./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack_longest-2.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_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/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_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack_longest-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/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_ea24b432-4999-496c-98c1-921f456cf2a4/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 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 --- 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 12:28:12,211 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:28:12,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:28:12,238 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:28:12,243 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:28:12,247 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:28:12,249 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:28:12,268 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:28:12,270 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:28:12,271 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:28:12,272 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:28:12,273 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:28:12,274 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:28:12,275 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:28:12,276 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:28:12,277 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:28:12,278 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:28:12,279 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:28:12,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:28:12,283 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:28:12,284 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:28:12,288 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:28:12,302 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:28:12,304 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:28:12,310 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:28:12,313 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:28:12,314 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:28:12,315 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:28:12,316 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:28:12,317 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:28:12,319 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:28:12,320 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:28:12,321 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:28:12,322 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:28:12,324 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:28:12,324 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:28:12,325 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:28:12,325 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:28:12,326 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:28:12,327 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:28:12,328 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:28:12,329 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 12:28:12,359 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:28:12,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:28:12,360 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:28:12,361 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:28:12,361 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 12:28:12,362 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 12:28:12,362 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:28:12,363 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:28:12,363 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:28:12,363 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:28:12,364 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 12:28:12,365 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 12:28:12,365 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 12:28:12,365 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:28:12,365 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 12:28:12,366 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 12:28:12,366 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 12:28:12,366 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 12:28:12,367 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 12:28:12,367 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:28:12,367 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 12:28:12,367 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:28:12,368 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:28:12,368 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 12:28:12,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:28:12,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:28:12,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 12:28:12,369 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 12:28:12,369 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 12:28:12,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 12:28:12,370 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 12:28:12,370 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 12:28:12,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 12:28:12,371 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_ea24b432-4999-496c-98c1-921f456cf2a4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 [2022-11-20 12:28:12,635 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:28:12,655 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:28:12,657 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:28:12,659 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:28:12,659 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:28:12,660 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/pthread/stack_longest-2.i [2022-11-20 12:28:15,646 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:28:15,951 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:28:15,952 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/sv-benchmarks/c/pthread/stack_longest-2.i [2022-11-20 12:28:15,968 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/data/d35dcf0fc/4085ebf93b1140ed9a48333aa7f24208/FLAG26ca6c353 [2022-11-20 12:28:15,981 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/data/d35dcf0fc/4085ebf93b1140ed9a48333aa7f24208 [2022-11-20 12:28:15,984 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:28:15,986 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:28:15,987 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:28:15,987 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:28:15,991 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:28:15,992 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:28:15" (1/1) ... [2022-11-20 12:28:15,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3712e3ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:15, skipping insertion in model container [2022-11-20 12:28:15,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:28:15" (1/1) ... [2022-11-20 12:28:16,001 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:28:16,044 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:28:16,630 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_ea24b432-4999-496c-98c1-921f456cf2a4/sv-benchmarks/c/pthread/stack_longest-2.i[41530,41543] [2022-11-20 12:28:16,669 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:28:16,684 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 12:28:16,717 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_ea24b432-4999-496c-98c1-921f456cf2a4/sv-benchmarks/c/pthread/stack_longest-2.i[41530,41543] [2022-11-20 12:28:16,743 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:28:16,800 INFO L208 MainTranslator]: Completed translation [2022-11-20 12:28:16,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:16 WrapperNode [2022-11-20 12:28:16,801 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 12:28:16,802 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 12:28:16,802 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 12:28:16,802 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 12:28:16,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:16" (1/1) ... [2022-11-20 12:28:16,835 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:16" (1/1) ... [2022-11-20 12:28:16,859 INFO L138 Inliner]: procedures = 277, calls = 38, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 148 [2022-11-20 12:28:16,860 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 12:28:16,861 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 12:28:16,861 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 12:28:16,861 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 12:28:16,876 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:16" (1/1) ... [2022-11-20 12:28:16,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:16" (1/1) ... [2022-11-20 12:28:16,879 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:16" (1/1) ... [2022-11-20 12:28:16,880 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:16" (1/1) ... [2022-11-20 12:28:16,889 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:16" (1/1) ... [2022-11-20 12:28:16,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:16" (1/1) ... [2022-11-20 12:28:16,912 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:16" (1/1) ... [2022-11-20 12:28:16,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:16" (1/1) ... [2022-11-20 12:28:16,916 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 12:28:16,917 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 12:28:16,917 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 12:28:16,917 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 12:28:16,918 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:16" (1/1) ... [2022-11-20 12:28:16,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:28:16,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:28:16,963 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 12:28:16,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 12:28:17,000 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-20 12:28:17,000 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-20 12:28:17,000 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-20 12:28:17,000 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-20 12:28:17,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 12:28:17,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 12:28:17,001 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 12:28:17,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 12:28:17,001 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-20 12:28:17,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 12:28:17,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 12:28:17,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 12:28:17,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 12:28:17,003 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 12:28:17,142 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 12:28:17,144 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 12:28:17,389 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 12:28:17,398 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 12:28:17,398 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 12:28:17,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:28:17 BoogieIcfgContainer [2022-11-20 12:28:17,400 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 12:28:17,403 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 12:28:17,403 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 12:28:17,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 12:28:17,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:28:15" (1/3) ... [2022-11-20 12:28:17,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b8f965c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:28:17, skipping insertion in model container [2022-11-20 12:28:17,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:16" (2/3) ... [2022-11-20 12:28:17,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b8f965c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:28:17, skipping insertion in model container [2022-11-20 12:28:17,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:28:17" (3/3) ... [2022-11-20 12:28:17,425 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2022-11-20 12:28:17,434 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 12:28:17,456 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 12:28:17,456 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-20 12:28:17,456 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 12:28:17,630 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 12:28:17,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 170 transitions, 356 flow [2022-11-20 12:28:17,761 INFO L130 PetriNetUnfolder]: 10/168 cut-off events. [2022-11-20 12:28:17,766 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 12:28:17,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 168 events. 10/168 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 408 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2022-11-20 12:28:17,773 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 170 transitions, 356 flow [2022-11-20 12:28:17,780 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 158 transitions, 325 flow [2022-11-20 12:28:17,792 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:28:17,806 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;@1a28cf13, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:28:17,808 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-20 12:28:17,857 INFO L130 PetriNetUnfolder]: 5/127 cut-off events. [2022-11-20 12:28:17,857 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 12:28:17,858 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:28:17,858 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] [2022-11-20 12:28:17,859 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 12:28:17,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:17,865 INFO L85 PathProgramCache]: Analyzing trace with hash -517190214, now seen corresponding path program 1 times [2022-11-20 12:28:17,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:17,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477622462] [2022-11-20 12:28:17,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:17,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:18,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:18,459 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 12:28:18,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:18,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477622462] [2022-11-20 12:28:18,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477622462] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:28:18,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:28:18,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:28:18,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583267624] [2022-11-20 12:28:18,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:28:18,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:28:18,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:18,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:28:18,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:28:18,519 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 170 [2022-11-20 12:28:18,526 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 158 transitions, 325 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 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 12:28:18,529 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:28:18,530 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 170 [2022-11-20 12:28:18,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:28:18,781 INFO L130 PetriNetUnfolder]: 88/697 cut-off events. [2022-11-20 12:28:18,782 INFO L131 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-11-20 12:28:18,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 880 conditions, 697 events. 88/697 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3111 event pairs, 32 based on Foata normal form. 69/700 useless extension candidates. Maximal degree in co-relation 747. Up to 111 conditions per place. [2022-11-20 12:28:18,794 INFO L137 encePairwiseOnDemand]: 160/170 looper letters, 20 selfloop transitions, 3 changer transitions 0/156 dead transitions. [2022-11-20 12:28:18,794 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 156 transitions, 373 flow [2022-11-20 12:28:18,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:28:18,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 12:28:18,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2022-11-20 12:28:18,809 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9274509803921569 [2022-11-20 12:28:18,810 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2022-11-20 12:28:18,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2022-11-20 12:28:18,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:28:18,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2022-11-20 12:28:18,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 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 12:28:18,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 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 12:28:18,827 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 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 12:28:18,829 INFO L175 Difference]: Start difference. First operand has 155 places, 158 transitions, 325 flow. Second operand 3 states and 473 transitions. [2022-11-20 12:28:18,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 156 transitions, 373 flow [2022-11-20 12:28:18,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 156 transitions, 365 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-20 12:28:18,838 INFO L231 Difference]: Finished difference. Result has 151 places, 150 transitions, 319 flow [2022-11-20 12:28:18,840 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=319, PETRI_PLACES=151, PETRI_TRANSITIONS=150} [2022-11-20 12:28:18,843 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, -4 predicate places. [2022-11-20 12:28:18,844 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 150 transitions, 319 flow [2022-11-20 12:28:18,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 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 12:28:18,844 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:28:18,845 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] [2022-11-20 12:28:18,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 12:28:18,846 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 12:28:18,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:18,848 INFO L85 PathProgramCache]: Analyzing trace with hash 694032677, now seen corresponding path program 1 times [2022-11-20 12:28:18,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:18,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350514984] [2022-11-20 12:28:18,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:18,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:18,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:19,054 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 12:28:19,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:19,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350514984] [2022-11-20 12:28:19,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350514984] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:28:19,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:28:19,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 12:28:19,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966753062] [2022-11-20 12:28:19,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:28:19,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:28:19,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:19,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:28:19,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:28:19,060 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 170 [2022-11-20 12:28:19,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 150 transitions, 319 flow. Second operand has 4 states, 4 states have (on average 151.75) internal successors, (607), 4 states have internal predecessors, (607), 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 12:28:19,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:28:19,061 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 170 [2022-11-20 12:28:19,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:28:19,240 INFO L130 PetriNetUnfolder]: 34/588 cut-off events. [2022-11-20 12:28:19,240 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-20 12:28:19,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 709 conditions, 588 events. 34/588 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2046 event pairs, 11 based on Foata normal form. 0/551 useless extension candidates. Maximal degree in co-relation 411. Up to 45 conditions per place. [2022-11-20 12:28:19,245 INFO L137 encePairwiseOnDemand]: 165/170 looper letters, 16 selfloop transitions, 4 changer transitions 0/158 dead transitions. [2022-11-20 12:28:19,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 158 transitions, 380 flow [2022-11-20 12:28:19,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:28:19,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-20 12:28:19,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 621 transitions. [2022-11-20 12:28:19,252 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.913235294117647 [2022-11-20 12:28:19,252 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 621 transitions. [2022-11-20 12:28:19,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 621 transitions. [2022-11-20 12:28:19,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:28:19,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 621 transitions. [2022-11-20 12:28:19,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.25) internal successors, (621), 4 states have internal predecessors, (621), 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 12:28:19,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 170.0) internal successors, (850), 5 states have internal predecessors, (850), 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 12:28:19,261 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 170.0) internal successors, (850), 5 states have internal predecessors, (850), 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 12:28:19,261 INFO L175 Difference]: Start difference. First operand has 151 places, 150 transitions, 319 flow. Second operand 4 states and 621 transitions. [2022-11-20 12:28:19,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 158 transitions, 380 flow [2022-11-20 12:28:19,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 158 transitions, 377 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 12:28:19,269 INFO L231 Difference]: Finished difference. Result has 155 places, 153 transitions, 344 flow [2022-11-20 12:28:19,270 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=344, PETRI_PLACES=155, PETRI_TRANSITIONS=153} [2022-11-20 12:28:19,271 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 0 predicate places. [2022-11-20 12:28:19,272 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 153 transitions, 344 flow [2022-11-20 12:28:19,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 151.75) internal successors, (607), 4 states have internal predecessors, (607), 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 12:28:19,272 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:28:19,273 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:28:19,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 12:28:19,274 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 12:28:19,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:19,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1141351082, now seen corresponding path program 1 times [2022-11-20 12:28:19,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:19,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433264083] [2022-11-20 12:28:19,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:19,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:19,459 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 12:28:19,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:19,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433264083] [2022-11-20 12:28:19,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433264083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:28:19,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:28:19,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:28:19,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932387491] [2022-11-20 12:28:19,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:28:19,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:28:19,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:19,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:28:19,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:28:19,464 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 170 [2022-11-20 12:28:19,464 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 153 transitions, 344 flow. Second operand has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 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 12:28:19,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:28:19,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 170 [2022-11-20 12:28:19,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:28:19,775 INFO L130 PetriNetUnfolder]: 127/1265 cut-off events. [2022-11-20 12:28:19,775 INFO L131 PetriNetUnfolder]: For 90/100 co-relation queries the response was YES. [2022-11-20 12:28:19,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1670 conditions, 1265 events. 127/1265 cut-off events. For 90/100 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 6947 event pairs, 33 based on Foata normal form. 12/1203 useless extension candidates. Maximal degree in co-relation 1334. Up to 135 conditions per place. [2022-11-20 12:28:19,785 INFO L137 encePairwiseOnDemand]: 164/170 looper letters, 25 selfloop transitions, 4 changer transitions 0/165 dead transitions. [2022-11-20 12:28:19,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 165 transitions, 435 flow [2022-11-20 12:28:19,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:28:19,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 12:28:19,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 468 transitions. [2022-11-20 12:28:19,787 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9176470588235294 [2022-11-20 12:28:19,787 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 468 transitions. [2022-11-20 12:28:19,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 468 transitions. [2022-11-20 12:28:19,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:28:19,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 468 transitions. [2022-11-20 12:28:19,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 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 12:28:19,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 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 12:28:19,793 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 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 12:28:19,793 INFO L175 Difference]: Start difference. First operand has 155 places, 153 transitions, 344 flow. Second operand 3 states and 468 transitions. [2022-11-20 12:28:19,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 165 transitions, 435 flow [2022-11-20 12:28:19,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 165 transitions, 433 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 12:28:19,802 INFO L231 Difference]: Finished difference. Result has 158 places, 157 transitions, 384 flow [2022-11-20 12:28:19,802 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=384, PETRI_PLACES=158, PETRI_TRANSITIONS=157} [2022-11-20 12:28:19,804 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 3 predicate places. [2022-11-20 12:28:19,805 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 157 transitions, 384 flow [2022-11-20 12:28:19,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 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 12:28:19,806 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:28:19,806 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2022-11-20 12:28:19,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 12:28:19,807 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 12:28:19,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:19,808 INFO L85 PathProgramCache]: Analyzing trace with hash 477260439, now seen corresponding path program 1 times [2022-11-20 12:28:19,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:19,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602294419] [2022-11-20 12:28:19,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:19,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:19,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:20,140 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:20,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:20,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602294419] [2022-11-20 12:28:20,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602294419] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:28:20,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889020569] [2022-11-20 12:28:20,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:20,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:20,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:28:20,153 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:28:20,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 12:28:20,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:20,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 12:28:20,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:28:20,556 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:20,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:28:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:20,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889020569] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:28:20,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:28:20,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 12:28:20,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164486721] [2022-11-20 12:28:20,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:28:20,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 12:28:20,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:20,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 12:28:20,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:28:20,728 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 170 [2022-11-20 12:28:20,730 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 157 transitions, 384 flow. Second operand has 10 states, 10 states have (on average 146.5) internal successors, (1465), 10 states have internal predecessors, (1465), 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 12:28:20,730 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:28:20,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 170 [2022-11-20 12:28:20,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:28:21,359 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([460] L1008-->L1010: Formula: (< 0 v_~top~0_7) InVars {~top~0=v_~top~0_7} OutVars{~top~0=v_~top~0_7} AuxVars[] AssignedVars[][178], [26#L1022-4true, 33#L1010true, Black: 177#(= |t1Thread1of1ForFork1_push_#res#1| 0), t2Thread1of1ForFork0InUse, Black: 180#(and (= |t1Thread1of1ForFork1_#t~ret41#1| 0) (= |t1Thread1of1ForFork1_push_#res#1| 0)), 190#true, 86#L945-2true, 186#(<= 1 ~top~0), Black: 184#true, Black: 172#(= ~top~0 0)]) [2022-11-20 12:28:21,359 INFO L383 tUnfolder$Statistics]: this new event has 183 ancestors and is cut-off event [2022-11-20 12:28:21,360 INFO L386 tUnfolder$Statistics]: existing Event has 163 ancestors and is cut-off event [2022-11-20 12:28:21,360 INFO L386 tUnfolder$Statistics]: existing Event has 155 ancestors and is cut-off event [2022-11-20 12:28:21,360 INFO L386 tUnfolder$Statistics]: existing Event has 162 ancestors and is cut-off event [2022-11-20 12:28:21,360 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([461] L1008-->L1008-1: Formula: (not (< 0 v_~top~0_13)) InVars {~top~0=v_~top~0_13} OutVars{~top~0=v_~top~0_13} AuxVars[] AssignedVars[][179], [154#L1008-1true, 26#L1022-4true, Black: 177#(= |t1Thread1of1ForFork1_push_#res#1| 0), t2Thread1of1ForFork0InUse, Black: 180#(and (= |t1Thread1of1ForFork1_#t~ret41#1| 0) (= |t1Thread1of1ForFork1_push_#res#1| 0)), 86#L945-2true, 184#true, Black: 186#(<= 1 ~top~0), 222#(<= ~top~0 0), Black: 172#(= ~top~0 0)]) [2022-11-20 12:28:21,360 INFO L383 tUnfolder$Statistics]: this new event has 183 ancestors and is cut-off event [2022-11-20 12:28:21,360 INFO L386 tUnfolder$Statistics]: existing Event has 163 ancestors and is cut-off event [2022-11-20 12:28:21,361 INFO L386 tUnfolder$Statistics]: existing Event has 155 ancestors and is cut-off event [2022-11-20 12:28:21,361 INFO L386 tUnfolder$Statistics]: existing Event has 162 ancestors and is cut-off event [2022-11-20 12:28:21,462 INFO L130 PetriNetUnfolder]: 387/2731 cut-off events. [2022-11-20 12:28:21,462 INFO L131 PetriNetUnfolder]: For 972/1058 co-relation queries the response was YES. [2022-11-20 12:28:21,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4169 conditions, 2731 events. 387/2731 cut-off events. For 972/1058 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 19218 event pairs, 64 based on Foata normal form. 38/2620 useless extension candidates. Maximal degree in co-relation 3635. Up to 300 conditions per place. [2022-11-20 12:28:21,482 INFO L137 encePairwiseOnDemand]: 161/170 looper letters, 86 selfloop transitions, 46 changer transitions 1/267 dead transitions. [2022-11-20 12:28:21,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 267 transitions, 1066 flow [2022-11-20 12:28:21,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 12:28:21,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-20 12:28:21,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2723 transitions. [2022-11-20 12:28:21,488 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8898692810457516 [2022-11-20 12:28:21,488 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2723 transitions. [2022-11-20 12:28:21,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2723 transitions. [2022-11-20 12:28:21,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:28:21,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2723 transitions. [2022-11-20 12:28:21,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 151.27777777777777) internal successors, (2723), 18 states have internal predecessors, (2723), 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 12:28:21,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 170.0) internal successors, (3230), 19 states have internal predecessors, (3230), 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 12:28:21,504 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 170.0) internal successors, (3230), 19 states have internal predecessors, (3230), 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 12:28:21,504 INFO L175 Difference]: Start difference. First operand has 158 places, 157 transitions, 384 flow. Second operand 18 states and 2723 transitions. [2022-11-20 12:28:21,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 267 transitions, 1066 flow [2022-11-20 12:28:21,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 267 transitions, 1004 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-11-20 12:28:21,513 INFO L231 Difference]: Finished difference. Result has 179 places, 212 transitions, 755 flow [2022-11-20 12:28:21,513 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=755, PETRI_PLACES=179, PETRI_TRANSITIONS=212} [2022-11-20 12:28:21,514 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 24 predicate places. [2022-11-20 12:28:21,514 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 212 transitions, 755 flow [2022-11-20 12:28:21,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 146.5) internal successors, (1465), 10 states have internal predecessors, (1465), 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 12:28:21,515 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:28:21,515 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, 1, 1, 1, 1, 1, 1, 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 12:28:21,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 12:28:21,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:21,736 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 12:28:21,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:21,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1349207881, now seen corresponding path program 1 times [2022-11-20 12:28:21,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:21,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600856738] [2022-11-20 12:28:21,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:21,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:21,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:21,949 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 12:28:21,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:21,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600856738] [2022-11-20 12:28:21,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600856738] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:28:21,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:28:21,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:28:21,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901378682] [2022-11-20 12:28:21,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:28:21,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:28:21,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:21,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:28:21,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:28:21,953 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 170 [2022-11-20 12:28:21,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 212 transitions, 755 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 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 12:28:21,954 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:28:21,954 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 170 [2022-11-20 12:28:21,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:28:22,173 INFO L130 PetriNetUnfolder]: 54/1105 cut-off events. [2022-11-20 12:28:22,173 INFO L131 PetriNetUnfolder]: For 239/239 co-relation queries the response was YES. [2022-11-20 12:28:22,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1514 conditions, 1105 events. 54/1105 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4850 event pairs, 9 based on Foata normal form. 18/1080 useless extension candidates. Maximal degree in co-relation 1132. Up to 51 conditions per place. [2022-11-20 12:28:22,179 INFO L137 encePairwiseOnDemand]: 166/170 looper letters, 12 selfloop transitions, 4 changer transitions 0/171 dead transitions. [2022-11-20 12:28:22,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 171 transitions, 532 flow [2022-11-20 12:28:22,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:28:22,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 12:28:22,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 462 transitions. [2022-11-20 12:28:22,181 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9058823529411765 [2022-11-20 12:28:22,182 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 462 transitions. [2022-11-20 12:28:22,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 462 transitions. [2022-11-20 12:28:22,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:28:22,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 462 transitions. [2022-11-20 12:28:22,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 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 12:28:22,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 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 12:28:22,185 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 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 12:28:22,185 INFO L175 Difference]: Start difference. First operand has 179 places, 212 transitions, 755 flow. Second operand 3 states and 462 transitions. [2022-11-20 12:28:22,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 171 transitions, 532 flow [2022-11-20 12:28:22,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 171 transitions, 510 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-11-20 12:28:22,192 INFO L231 Difference]: Finished difference. Result has 169 places, 169 transitions, 479 flow [2022-11-20 12:28:22,192 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=479, PETRI_PLACES=169, PETRI_TRANSITIONS=169} [2022-11-20 12:28:22,195 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 14 predicate places. [2022-11-20 12:28:22,195 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 169 transitions, 479 flow [2022-11-20 12:28:22,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 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 12:28:22,195 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:28:22,196 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:28:22,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 12:28:22,196 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 12:28:22,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:22,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1885154879, now seen corresponding path program 1 times [2022-11-20 12:28:22,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:22,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216867434] [2022-11-20 12:28:22,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:22,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:22,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:24,266 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 12:28:24,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:24,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216867434] [2022-11-20 12:28:24,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216867434] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:28:24,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:28:24,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-11-20 12:28:24,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919783681] [2022-11-20 12:28:24,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:28:24,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 12:28:24,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:24,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 12:28:24,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-11-20 12:28:24,273 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 170 [2022-11-20 12:28:24,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 169 transitions, 479 flow. Second operand has 25 states, 25 states have (on average 97.28) internal successors, (2432), 25 states have internal predecessors, (2432), 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 12:28:24,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:28:24,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 170 [2022-11-20 12:28:24,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:28:27,297 INFO L130 PetriNetUnfolder]: 1109/4445 cut-off events. [2022-11-20 12:28:27,297 INFO L131 PetriNetUnfolder]: For 789/789 co-relation queries the response was YES. [2022-11-20 12:28:27,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8358 conditions, 4445 events. 1109/4445 cut-off events. For 789/789 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 33497 event pairs, 163 based on Foata normal form. 0/4293 useless extension candidates. Maximal degree in co-relation 4747. Up to 1468 conditions per place. [2022-11-20 12:28:27,323 INFO L137 encePairwiseOnDemand]: 136/170 looper letters, 254 selfloop transitions, 42 changer transitions 2/382 dead transitions. [2022-11-20 12:28:27,323 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 382 transitions, 1684 flow [2022-11-20 12:28:27,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-20 12:28:27,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-11-20 12:28:27,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3209 transitions. [2022-11-20 12:28:27,332 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6089184060721062 [2022-11-20 12:28:27,332 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3209 transitions. [2022-11-20 12:28:27,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3209 transitions. [2022-11-20 12:28:27,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:28:27,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3209 transitions. [2022-11-20 12:28:27,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 103.51612903225806) internal successors, (3209), 31 states have internal predecessors, (3209), 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 12:28:27,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 170.0) internal successors, (5440), 32 states have internal predecessors, (5440), 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 12:28:27,357 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 170.0) internal successors, (5440), 32 states have internal predecessors, (5440), 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 12:28:27,358 INFO L175 Difference]: Start difference. First operand has 169 places, 169 transitions, 479 flow. Second operand 31 states and 3209 transitions. [2022-11-20 12:28:27,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 382 transitions, 1684 flow [2022-11-20 12:28:27,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 382 transitions, 1680 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 12:28:27,370 INFO L231 Difference]: Finished difference. Result has 225 places, 207 transitions, 793 flow [2022-11-20 12:28:27,371 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=793, PETRI_PLACES=225, PETRI_TRANSITIONS=207} [2022-11-20 12:28:27,373 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 70 predicate places. [2022-11-20 12:28:27,376 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 207 transitions, 793 flow [2022-11-20 12:28:27,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 97.28) internal successors, (2432), 25 states have internal predecessors, (2432), 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 12:28:27,382 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:28:27,383 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:28:27,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 12:28:27,384 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 12:28:27,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:27,384 INFO L85 PathProgramCache]: Analyzing trace with hash -498230787, now seen corresponding path program 2 times [2022-11-20 12:28:27,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:27,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538982005] [2022-11-20 12:28:27,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:27,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:27,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:29,685 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 12:28:29,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:29,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538982005] [2022-11-20 12:28:29,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538982005] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:28:29,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:28:29,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-11-20 12:28:29,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725590223] [2022-11-20 12:28:29,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:28:29,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-20 12:28:29,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:29,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-20 12:28:29,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-11-20 12:28:29,692 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 170 [2022-11-20 12:28:29,694 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 207 transitions, 793 flow. Second operand has 29 states, 29 states have (on average 85.24137931034483) internal successors, (2472), 29 states have internal predecessors, (2472), 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 12:28:29,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:28:29,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 170 [2022-11-20 12:28:29,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:28:34,008 INFO L130 PetriNetUnfolder]: 1488/5983 cut-off events. [2022-11-20 12:28:34,008 INFO L131 PetriNetUnfolder]: For 2945/2947 co-relation queries the response was YES. [2022-11-20 12:28:34,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13027 conditions, 5983 events. 1488/5983 cut-off events. For 2945/2947 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 49013 event pairs, 314 based on Foata normal form. 4/5867 useless extension candidates. Maximal degree in co-relation 7835. Up to 1503 conditions per place. [2022-11-20 12:28:34,059 INFO L137 encePairwiseOnDemand]: 134/170 looper letters, 259 selfloop transitions, 60 changer transitions 2/397 dead transitions. [2022-11-20 12:28:34,060 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 397 transitions, 2185 flow [2022-11-20 12:28:34,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-20 12:28:34,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-20 12:28:34,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2918 transitions. [2022-11-20 12:28:34,070 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5363970588235294 [2022-11-20 12:28:34,070 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2918 transitions. [2022-11-20 12:28:34,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2918 transitions. [2022-11-20 12:28:34,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:28:34,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2918 transitions. [2022-11-20 12:28:34,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 91.1875) internal successors, (2918), 32 states have internal predecessors, (2918), 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 12:28:34,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 170.0) internal successors, (5610), 33 states have internal predecessors, (5610), 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 12:28:34,092 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 170.0) internal successors, (5610), 33 states have internal predecessors, (5610), 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 12:28:34,092 INFO L175 Difference]: Start difference. First operand has 225 places, 207 transitions, 793 flow. Second operand 32 states and 2918 transitions. [2022-11-20 12:28:34,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 397 transitions, 2185 flow [2022-11-20 12:28:34,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 397 transitions, 2181 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-20 12:28:34,116 INFO L231 Difference]: Finished difference. Result has 269 places, 226 transitions, 1111 flow [2022-11-20 12:28:34,117 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=789, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1111, PETRI_PLACES=269, PETRI_TRANSITIONS=226} [2022-11-20 12:28:34,118 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 114 predicate places. [2022-11-20 12:28:34,118 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 226 transitions, 1111 flow [2022-11-20 12:28:34,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 85.24137931034483) internal successors, (2472), 29 states have internal predecessors, (2472), 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 12:28:34,120 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:28:34,120 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:28:34,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 12:28:34,120 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 12:28:34,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:34,121 INFO L85 PathProgramCache]: Analyzing trace with hash 77169637, now seen corresponding path program 3 times [2022-11-20 12:28:34,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:34,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389781693] [2022-11-20 12:28:34,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:34,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:36,394 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 12:28:36,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:36,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389781693] [2022-11-20 12:28:36,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389781693] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:28:36,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:28:36,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-11-20 12:28:36,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260893549] [2022-11-20 12:28:36,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:28:36,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 12:28:36,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:36,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 12:28:36,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-11-20 12:28:36,400 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 170 [2022-11-20 12:28:36,403 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 226 transitions, 1111 flow. Second operand has 25 states, 25 states have (on average 90.4) internal successors, (2260), 25 states have internal predecessors, (2260), 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 12:28:36,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:28:36,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 170 [2022-11-20 12:28:36,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:28:41,486 INFO L130 PetriNetUnfolder]: 1792/7572 cut-off events. [2022-11-20 12:28:41,486 INFO L131 PetriNetUnfolder]: For 5108/5111 co-relation queries the response was YES. [2022-11-20 12:28:41,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17104 conditions, 7572 events. 1792/7572 cut-off events. For 5108/5111 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 66507 event pairs, 273 based on Foata normal form. 8/7429 useless extension candidates. Maximal degree in co-relation 9319. Up to 1276 conditions per place. [2022-11-20 12:28:41,554 INFO L137 encePairwiseOnDemand]: 144/170 looper letters, 233 selfloop transitions, 53 changer transitions 14/388 dead transitions. [2022-11-20 12:28:41,554 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 388 transitions, 2442 flow [2022-11-20 12:28:41,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 12:28:41,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-20 12:28:41,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2429 transitions. [2022-11-20 12:28:41,566 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5715294117647058 [2022-11-20 12:28:41,567 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2429 transitions. [2022-11-20 12:28:41,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2429 transitions. [2022-11-20 12:28:41,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:28:41,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2429 transitions. [2022-11-20 12:28:41,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 97.16) internal successors, (2429), 25 states have internal predecessors, (2429), 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 12:28:41,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 170.0) internal successors, (4420), 26 states have internal predecessors, (4420), 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 12:28:41,585 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 170.0) internal successors, (4420), 26 states have internal predecessors, (4420), 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 12:28:41,585 INFO L175 Difference]: Start difference. First operand has 269 places, 226 transitions, 1111 flow. Second operand 25 states and 2429 transitions. [2022-11-20 12:28:41,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 388 transitions, 2442 flow [2022-11-20 12:28:41,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 388 transitions, 2350 flow, removed 27 selfloop flow, removed 14 redundant places. [2022-11-20 12:28:41,617 INFO L231 Difference]: Finished difference. Result has 287 places, 238 transitions, 1315 flow [2022-11-20 12:28:41,618 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=1043, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1315, PETRI_PLACES=287, PETRI_TRANSITIONS=238} [2022-11-20 12:28:41,619 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 132 predicate places. [2022-11-20 12:28:41,619 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 238 transitions, 1315 flow [2022-11-20 12:28:41,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 90.4) internal successors, (2260), 25 states have internal predecessors, (2260), 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 12:28:41,620 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:28:41,621 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:28:41,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 12:28:41,621 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 12:28:41,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:41,622 INFO L85 PathProgramCache]: Analyzing trace with hash -2016832061, now seen corresponding path program 1 times [2022-11-20 12:28:41,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:41,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098460255] [2022-11-20 12:28:41,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:41,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:41,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:41,833 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:41,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:41,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098460255] [2022-11-20 12:28:41,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098460255] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:28:41,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566492368] [2022-11-20 12:28:41,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:41,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:41,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:28:41,836 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:28:41,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 12:28:41,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:41,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 12:28:41,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:28:42,156 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 12:28:42,156 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:28:42,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566492368] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:28:42,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:28:42,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 8 [2022-11-20 12:28:42,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108685572] [2022-11-20 12:28:42,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:28:42,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:28:42,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:42,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:28:42,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:28:42,162 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 170 [2022-11-20 12:28:42,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 238 transitions, 1315 flow. Second operand has 6 states, 6 states have (on average 144.83333333333334) internal successors, (869), 6 states have internal predecessors, (869), 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 12:28:42,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:28:42,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 170 [2022-11-20 12:28:42,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:28:43,310 INFO L130 PetriNetUnfolder]: 247/3293 cut-off events. [2022-11-20 12:28:43,311 INFO L131 PetriNetUnfolder]: For 2623/2625 co-relation queries the response was YES. [2022-11-20 12:28:43,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6533 conditions, 3293 events. 247/3293 cut-off events. For 2623/2625 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 23842 event pairs, 67 based on Foata normal form. 13/3233 useless extension candidates. Maximal degree in co-relation 4741. Up to 261 conditions per place. [2022-11-20 12:28:43,335 INFO L137 encePairwiseOnDemand]: 160/170 looper letters, 50 selfloop transitions, 30 changer transitions 0/260 dead transitions. [2022-11-20 12:28:43,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 260 transitions, 1522 flow [2022-11-20 12:28:43,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 12:28:43,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-20 12:28:43,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1186 transitions. [2022-11-20 12:28:43,340 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8720588235294118 [2022-11-20 12:28:43,340 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1186 transitions. [2022-11-20 12:28:43,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1186 transitions. [2022-11-20 12:28:43,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:28:43,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1186 transitions. [2022-11-20 12:28:43,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 148.25) internal successors, (1186), 8 states have internal predecessors, (1186), 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 12:28:43,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 170.0) internal successors, (1530), 9 states have internal predecessors, (1530), 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 12:28:43,348 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 170.0) internal successors, (1530), 9 states have internal predecessors, (1530), 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 12:28:43,348 INFO L175 Difference]: Start difference. First operand has 287 places, 238 transitions, 1315 flow. Second operand 8 states and 1186 transitions. [2022-11-20 12:28:43,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 260 transitions, 1522 flow [2022-11-20 12:28:43,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 260 transitions, 1448 flow, removed 20 selfloop flow, removed 14 redundant places. [2022-11-20 12:28:43,370 INFO L231 Difference]: Finished difference. Result has 285 places, 241 transitions, 1351 flow [2022-11-20 12:28:43,370 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=1172, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1351, PETRI_PLACES=285, PETRI_TRANSITIONS=241} [2022-11-20 12:28:43,371 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 130 predicate places. [2022-11-20 12:28:43,371 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 241 transitions, 1351 flow [2022-11-20 12:28:43,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 144.83333333333334) internal successors, (869), 6 states have internal predecessors, (869), 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 12:28:43,372 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:28:43,372 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:28:43,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 12:28:43,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-20 12:28:43,588 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 12:28:43,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:43,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1911220724, now seen corresponding path program 1 times [2022-11-20 12:28:43,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:28:43,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946814609] [2022-11-20 12:28:43,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:43,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:28:43,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:45,022 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 12:28:45,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:28:45,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946814609] [2022-11-20 12:28:45,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946814609] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:28:45,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645534870] [2022-11-20 12:28:45,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:45,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:28:45,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:28:45,024 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:28:45,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 12:28:45,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:45,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-20 12:28:45,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:28:46,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-20 12:28:48,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2022-11-20 12:28:48,500 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:48,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:28:49,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-11-20 12:28:50,092 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 12:28:50,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645534870] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 12:28:50,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:28:50,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [23, 26] total 66 [2022-11-20 12:28:50,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819169613] [2022-11-20 12:28:50,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:28:50,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 12:28:50,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:28:50,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 12:28:50,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=4050, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 12:28:50,099 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 170 [2022-11-20 12:28:50,101 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 241 transitions, 1351 flow. Second operand has 22 states, 22 states have (on average 98.45454545454545) internal successors, (2166), 22 states have internal predecessors, (2166), 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 12:28:50,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:28:50,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 170 [2022-11-20 12:28:50,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:29:00,085 INFO L130 PetriNetUnfolder]: 2639/10837 cut-off events. [2022-11-20 12:29:00,086 INFO L131 PetriNetUnfolder]: For 9116/9116 co-relation queries the response was YES. [2022-11-20 12:29:00,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24866 conditions, 10837 events. 2639/10837 cut-off events. For 9116/9116 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 100656 event pairs, 407 based on Foata normal form. 12/10624 useless extension candidates. Maximal degree in co-relation 22474. Up to 1446 conditions per place. [2022-11-20 12:29:00,174 INFO L137 encePairwiseOnDemand]: 135/170 looper letters, 276 selfloop transitions, 184 changer transitions 3/547 dead transitions. [2022-11-20 12:29:00,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 547 transitions, 3746 flow [2022-11-20 12:29:00,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-20 12:29:00,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-11-20 12:29:00,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 6595 transitions. [2022-11-20 12:29:00,190 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5877896613190731 [2022-11-20 12:29:00,191 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 6595 transitions. [2022-11-20 12:29:00,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 6595 transitions. [2022-11-20 12:29:00,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:29:00,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 6595 transitions. [2022-11-20 12:29:00,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 99.92424242424242) internal successors, (6595), 66 states have internal predecessors, (6595), 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 12:29:00,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 170.0) internal successors, (11390), 67 states have internal predecessors, (11390), 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 12:29:00,232 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 170.0) internal successors, (11390), 67 states have internal predecessors, (11390), 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 12:29:00,232 INFO L175 Difference]: Start difference. First operand has 285 places, 241 transitions, 1351 flow. Second operand 66 states and 6595 transitions. [2022-11-20 12:29:00,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 547 transitions, 3746 flow [2022-11-20 12:29:00,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 547 transitions, 3686 flow, removed 30 selfloop flow, removed 0 redundant places. [2022-11-20 12:29:00,289 INFO L231 Difference]: Finished difference. Result has 367 places, 366 transitions, 2722 flow [2022-11-20 12:29:00,290 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=1331, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=2722, PETRI_PLACES=367, PETRI_TRANSITIONS=366} [2022-11-20 12:29:00,290 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 212 predicate places. [2022-11-20 12:29:00,291 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 366 transitions, 2722 flow [2022-11-20 12:29:00,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 98.45454545454545) internal successors, (2166), 22 states have internal predecessors, (2166), 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 12:29:00,292 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:29:00,292 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:29:00,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 12:29:00,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 12:29:00,497 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 12:29:00,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:29:00,498 INFO L85 PathProgramCache]: Analyzing trace with hash -242106828, now seen corresponding path program 2 times [2022-11-20 12:29:00,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:29:00,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387492363] [2022-11-20 12:29:00,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:29:00,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:29:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:29:02,600 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 12:29:02,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:29:02,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387492363] [2022-11-20 12:29:02,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387492363] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:29:02,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869239182] [2022-11-20 12:29:02,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:29:02,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:29:02,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:29:02,603 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:29:02,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 12:29:02,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 12:29:02,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:29:02,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-20 12:29:02,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:29:02,885 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 12:29:02,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-20 12:29:02,905 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:29:02,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 12:29:03,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-20 12:29:04,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2022-11-20 12:29:05,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 21 [2022-11-20 12:29:05,514 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 12:29:05,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:29:06,573 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:29:06,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-20 12:29:06,584 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:29:06,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-11-20 12:29:06,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-11-20 12:29:07,868 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 12:29:07,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-20 12:29:07,873 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 12:29:07,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869239182] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:29:07,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:29:07,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 73 [2022-11-20 12:29:07,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861324465] [2022-11-20 12:29:07,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:29:07,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-20 12:29:07,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:29:07,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-20 12:29:07,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=4976, Unknown=7, NotChecked=0, Total=5256 [2022-11-20 12:29:07,884 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 170 [2022-11-20 12:29:07,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 366 transitions, 2722 flow. Second operand has 73 states, 73 states have (on average 86.24657534246575) internal successors, (6296), 73 states have internal predecessors, (6296), 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 12:29:07,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:29:07,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 170 [2022-11-20 12:29:07,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:29:35,065 INFO L130 PetriNetUnfolder]: 3128/12626 cut-off events. [2022-11-20 12:29:35,065 INFO L131 PetriNetUnfolder]: For 13468/13475 co-relation queries the response was YES. [2022-11-20 12:29:35,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32404 conditions, 12626 events. 3128/12626 cut-off events. For 13468/13475 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 122261 event pairs, 155 based on Foata normal form. 8/12385 useless extension candidates. Maximal degree in co-relation 29594. Up to 1715 conditions per place. [2022-11-20 12:29:35,178 INFO L137 encePairwiseOnDemand]: 132/170 looper letters, 277 selfloop transitions, 264 changer transitions 3/620 dead transitions. [2022-11-20 12:29:35,178 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 620 transitions, 4944 flow [2022-11-20 12:29:35,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-11-20 12:29:35,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2022-11-20 12:29:35,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 6391 transitions. [2022-11-20 12:29:35,200 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5149879129734085 [2022-11-20 12:29:35,200 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 6391 transitions. [2022-11-20 12:29:35,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 6391 transitions. [2022-11-20 12:29:35,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:29:35,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 6391 transitions. [2022-11-20 12:29:35,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 87.54794520547945) internal successors, (6391), 73 states have internal predecessors, (6391), 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 12:29:35,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 170.0) internal successors, (12580), 74 states have internal predecessors, (12580), 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 12:29:35,249 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 170.0) internal successors, (12580), 74 states have internal predecessors, (12580), 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 12:29:35,250 INFO L175 Difference]: Start difference. First operand has 367 places, 366 transitions, 2722 flow. Second operand 73 states and 6391 transitions. [2022-11-20 12:29:35,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 620 transitions, 4944 flow [2022-11-20 12:29:35,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 620 transitions, 4568 flow, removed 161 selfloop flow, removed 11 redundant places. [2022-11-20 12:29:35,429 INFO L231 Difference]: Finished difference. Result has 443 places, 441 transitions, 3658 flow [2022-11-20 12:29:35,430 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=2400, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=3658, PETRI_PLACES=443, PETRI_TRANSITIONS=441} [2022-11-20 12:29:35,431 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 288 predicate places. [2022-11-20 12:29:35,431 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 441 transitions, 3658 flow [2022-11-20 12:29:35,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 86.24657534246575) internal successors, (6296), 73 states have internal predecessors, (6296), 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 12:29:35,433 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:29:35,433 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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 12:29:35,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 12:29:35,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:29:35,639 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 12:29:35,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:29:35,640 INFO L85 PathProgramCache]: Analyzing trace with hash -24835102, now seen corresponding path program 2 times [2022-11-20 12:29:35,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:29:35,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013189695] [2022-11-20 12:29:35,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:29:35,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:29:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:29:35,899 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 61 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 12:29:35,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:29:35,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013189695] [2022-11-20 12:29:35,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013189695] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:29:35,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147190971] [2022-11-20 12:29:35,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:29:35,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:29:35,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:29:35,902 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:29:35,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 12:29:36,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:29:36,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:29:36,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 12:29:36,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:29:36,448 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 61 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 12:29:36,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:29:36,699 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 61 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 12:29:36,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147190971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:29:36,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:29:36,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-11-20 12:29:36,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871214465] [2022-11-20 12:29:36,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:29:36,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:29:36,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:29:36,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:29:36,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:29:36,707 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 170 [2022-11-20 12:29:36,709 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 441 transitions, 3658 flow. Second operand has 16 states, 16 states have (on average 145.375) internal successors, (2326), 16 states have internal predecessors, (2326), 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 12:29:36,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:29:36,709 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 170 [2022-11-20 12:29:36,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:29:38,848 INFO L130 PetriNetUnfolder]: 568/6623 cut-off events. [2022-11-20 12:29:38,848 INFO L131 PetriNetUnfolder]: For 9854/9860 co-relation queries the response was YES. [2022-11-20 12:29:38,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16460 conditions, 6623 events. 568/6623 cut-off events. For 9854/9860 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 56452 event pairs, 133 based on Foata normal form. 20/6461 useless extension candidates. Maximal degree in co-relation 15090. Up to 244 conditions per place. [2022-11-20 12:29:38,892 INFO L137 encePairwiseOnDemand]: 160/170 looper letters, 94 selfloop transitions, 139 changer transitions 1/534 dead transitions. [2022-11-20 12:29:38,892 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 534 transitions, 4810 flow [2022-11-20 12:29:38,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 12:29:38,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-20 12:29:38,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3214 transitions. [2022-11-20 12:29:38,897 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8593582887700535 [2022-11-20 12:29:38,897 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3214 transitions. [2022-11-20 12:29:38,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3214 transitions. [2022-11-20 12:29:38,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:29:38,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3214 transitions. [2022-11-20 12:29:38,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 146.0909090909091) internal successors, (3214), 22 states have internal predecessors, (3214), 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 12:29:38,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 170.0) internal successors, (3910), 23 states have internal predecessors, (3910), 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 12:29:38,909 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 170.0) internal successors, (3910), 23 states have internal predecessors, (3910), 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 12:29:38,909 INFO L175 Difference]: Start difference. First operand has 443 places, 441 transitions, 3658 flow. Second operand 22 states and 3214 transitions. [2022-11-20 12:29:38,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 534 transitions, 4810 flow [2022-11-20 12:29:39,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 534 transitions, 4471 flow, removed 76 selfloop flow, removed 21 redundant places. [2022-11-20 12:29:39,020 INFO L231 Difference]: Finished difference. Result has 448 places, 473 transitions, 4073 flow [2022-11-20 12:29:39,020 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=3358, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4073, PETRI_PLACES=448, PETRI_TRANSITIONS=473} [2022-11-20 12:29:39,021 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 293 predicate places. [2022-11-20 12:29:39,021 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 473 transitions, 4073 flow [2022-11-20 12:29:39,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 145.375) internal successors, (2326), 16 states have internal predecessors, (2326), 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 12:29:39,022 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:29:39,022 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-20 12:29:39,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-20 12:29:39,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 12:29:39,228 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 12:29:39,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:29:39,229 INFO L85 PathProgramCache]: Analyzing trace with hash -2118414465, now seen corresponding path program 1 times [2022-11-20 12:29:39,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:29:39,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722788795] [2022-11-20 12:29:39,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:29:39,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:29:39,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:29:42,356 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 3 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:29:42,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:29:42,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722788795] [2022-11-20 12:29:42,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722788795] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:29:42,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992287049] [2022-11-20 12:29:42,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:29:42,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:29:42,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:29:42,359 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:29:42,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 12:29:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:29:42,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-20 12:29:42,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:29:43,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-20 12:29:45,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:29:45,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 36 [2022-11-20 12:29:47,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2022-11-20 12:29:47,463 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 5 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:29:47,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:29:51,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 48 [2022-11-20 12:29:52,561 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:29:52,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992287049] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:29:52,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:29:52,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 32] total 95 [2022-11-20 12:29:52,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357720661] [2022-11-20 12:29:52,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:29:52,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-11-20 12:29:52,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:29:52,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-11-20 12:29:52,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=8185, Unknown=0, NotChecked=0, Total=8930 [2022-11-20 12:29:52,575 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 170 [2022-11-20 12:29:52,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 473 transitions, 4073 flow. Second operand has 95 states, 95 states have (on average 98.05263157894737) internal successors, (9315), 95 states have internal predecessors, (9315), 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 12:29:52,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:29:52,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 170 [2022-11-20 12:29:52,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:32:02,235 WARN L233 SmtUtils]: Spent 5.86s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:32:04,739 INFO L130 PetriNetUnfolder]: 7578/30857 cut-off events. [2022-11-20 12:32:04,739 INFO L131 PetriNetUnfolder]: For 45744/45751 co-relation queries the response was YES. [2022-11-20 12:32:05,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84376 conditions, 30857 events. 7578/30857 cut-off events. For 45744/45751 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 328100 event pairs, 1006 based on Foata normal form. 91/30352 useless extension candidates. Maximal degree in co-relation 76169. Up to 5132 conditions per place. [2022-11-20 12:32:05,091 INFO L137 encePairwiseOnDemand]: 127/170 looper letters, 1596 selfloop transitions, 901 changer transitions 301/2882 dead transitions. [2022-11-20 12:32:05,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 856 places, 2882 transitions, 23988 flow [2022-11-20 12:32:05,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 409 states. [2022-11-20 12:32:05,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2022-11-20 12:32:05,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 40762 transitions. [2022-11-20 12:32:05,140 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5862505393355386 [2022-11-20 12:32:05,140 INFO L72 ComplementDD]: Start complementDD. Operand 409 states and 40762 transitions. [2022-11-20 12:32:05,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 409 states and 40762 transitions. [2022-11-20 12:32:05,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:32:05,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 409 states and 40762 transitions. [2022-11-20 12:32:05,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 410 states, 409 states have (on average 99.66259168704157) internal successors, (40762), 409 states have internal predecessors, (40762), 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 12:32:05,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 410 states, 410 states have (on average 170.0) internal successors, (69700), 410 states have internal predecessors, (69700), 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 12:32:05,330 INFO L81 ComplementDD]: Finished complementDD. Result has 410 states, 410 states have (on average 170.0) internal successors, (69700), 410 states have internal predecessors, (69700), 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 12:32:05,331 INFO L175 Difference]: Start difference. First operand has 448 places, 473 transitions, 4073 flow. Second operand 409 states and 40762 transitions. [2022-11-20 12:32:05,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 856 places, 2882 transitions, 23988 flow [2022-11-20 12:32:05,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 849 places, 2882 transitions, 23331 flow, removed 237 selfloop flow, removed 7 redundant places. [2022-11-20 12:32:05,912 INFO L231 Difference]: Finished difference. Result has 993 places, 1413 transitions, 15367 flow [2022-11-20 12:32:05,913 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=3869, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=409, PETRI_FLOW=15367, PETRI_PLACES=993, PETRI_TRANSITIONS=1413} [2022-11-20 12:32:05,915 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 838 predicate places. [2022-11-20 12:32:05,915 INFO L495 AbstractCegarLoop]: Abstraction has has 993 places, 1413 transitions, 15367 flow [2022-11-20 12:32:05,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 98.05263157894737) internal successors, (9315), 95 states have internal predecessors, (9315), 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 12:32:05,917 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:32:05,918 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-20 12:32:05,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 12:32:06,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 12:32:06,125 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 12:32:06,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:32:06,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1314927723, now seen corresponding path program 2 times [2022-11-20 12:32:06,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:32:06,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316532395] [2022-11-20 12:32:06,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:32:06,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:32:06,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:32:09,575 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 3 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:32:09,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:32:09,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316532395] [2022-11-20 12:32:09,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316532395] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:32:09,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112232771] [2022-11-20 12:32:09,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:32:09,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:32:09,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:32:09,583 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:32:09,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea24b432-4999-496c-98c1-921f456cf2a4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 12:32:09,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:32:09,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:32:09,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-20 12:32:09,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:32:09,904 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 12:32:09,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-20 12:32:09,925 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:32:09,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 12:32:10,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 12:32:11,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 12:32:12,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:32:12,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2022-11-20 12:32:13,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-11-20 12:32:13,791 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:32:13,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:32:16,776 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:32:16,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-20 12:32:16,787 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:32:16,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-11-20 12:32:16,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-11-20 12:32:18,171 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 12:32:18,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-20 12:32:18,243 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:32:18,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112232771] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:32:18,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:32:18,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 34, 34] total 96 [2022-11-20 12:32:18,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773425467] [2022-11-20 12:32:18,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:32:18,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-11-20 12:32:18,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:32:18,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-11-20 12:32:18,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=648, Invalid=8469, Unknown=3, NotChecked=0, Total=9120 [2022-11-20 12:32:18,251 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 170 [2022-11-20 12:32:18,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 993 places, 1413 transitions, 15367 flow. Second operand has 96 states, 96 states have (on average 86.04166666666667) internal successors, (8260), 96 states have internal predecessors, (8260), 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 12:32:18,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:32:18,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 170 [2022-11-20 12:32:18,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:34:22,572 WARN L233 SmtUtils]: Spent 10.44s on a formula simplification. DAG size of input: 102 DAG size of output: 91 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:34:32,681 WARN L233 SmtUtils]: Spent 8.96s on a formula simplification. DAG size of input: 118 DAG size of output: 103 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:35:00,931 WARN L233 SmtUtils]: Spent 8.36s on a formula simplification. DAG size of input: 111 DAG size of output: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:35:09,803 WARN L233 SmtUtils]: Spent 8.27s on a formula simplification. DAG size of input: 90 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:35:19,599 WARN L233 SmtUtils]: Spent 8.54s on a formula simplification. DAG size of input: 127 DAG size of output: 92 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:35:28,736 WARN L233 SmtUtils]: Spent 8.40s on a formula simplification. DAG size of input: 106 DAG size of output: 71 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:35:42,229 WARN L233 SmtUtils]: Spent 11.05s on a formula simplification. DAG size of input: 138 DAG size of output: 103 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:35:53,265 WARN L233 SmtUtils]: Spent 8.71s on a formula simplification. DAG size of input: 122 DAG size of output: 91 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:36:06,500 WARN L233 SmtUtils]: Spent 9.29s on a formula simplification. DAG size of input: 143 DAG size of output: 108 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:36:16,957 WARN L233 SmtUtils]: Spent 8.85s on a formula simplification. DAG size of input: 127 DAG size of output: 96 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)