./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8 --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 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 --- 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-2329fc7 [2022-12-13 15:01:44,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 15:01:44,441 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 15:01:44,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 15:01:44,459 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 15:01:44,460 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 15:01:44,461 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 15:01:44,463 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 15:01:44,464 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 15:01:44,465 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 15:01:44,466 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 15:01:44,467 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 15:01:44,467 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 15:01:44,468 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 15:01:44,469 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 15:01:44,470 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 15:01:44,471 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 15:01:44,472 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 15:01:44,473 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 15:01:44,475 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 15:01:44,476 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 15:01:44,477 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 15:01:44,478 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 15:01:44,479 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 15:01:44,482 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 15:01:44,483 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 15:01:44,483 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 15:01:44,484 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 15:01:44,484 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 15:01:44,485 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 15:01:44,485 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 15:01:44,486 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 15:01:44,486 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 15:01:44,487 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 15:01:44,488 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 15:01:44,488 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 15:01:44,489 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 15:01:44,489 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 15:01:44,489 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 15:01:44,490 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 15:01:44,490 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 15:01:44,491 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 15:01:44,509 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 15:01:44,509 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 15:01:44,509 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 15:01:44,509 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 15:01:44,510 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 15:01:44,510 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 15:01:44,511 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 15:01:44,511 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 15:01:44,511 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 15:01:44,511 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 15:01:44,511 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 15:01:44,511 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 15:01:44,512 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 15:01:44,512 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 15:01:44,512 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 15:01:44,512 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 15:01:44,512 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 15:01:44,512 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 15:01:44,513 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 15:01:44,513 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 15:01:44,513 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 15:01:44,513 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 15:01:44,513 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 15:01:44,513 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 15:01:44,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:01:44,514 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 15:01:44,514 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 15:01:44,514 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 15:01:44,514 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 15:01:44,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 15:01:44,515 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 15:01:44,515 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 15:01:44,515 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 15:01:44,515 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 15:01:44,515 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 15:01:44,515 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 [2022-12-13 15:01:44,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 15:01:44,716 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 15:01:44,718 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 15:01:44,720 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 15:01:44,720 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 15:01:44,721 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2022-12-13 15:01:47,293 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 15:01:47,465 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 15:01:47,466 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2022-12-13 15:01:47,471 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/data/0fc024eea/e0eb289c53a04919aeee8cf46d74fd79/FLAGfb8e7a0cc [2022-12-13 15:01:47,877 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/data/0fc024eea/e0eb289c53a04919aeee8cf46d74fd79 [2022-12-13 15:01:47,879 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 15:01:47,880 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 15:01:47,881 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 15:01:47,881 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 15:01:47,884 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 15:01:47,885 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:01:47" (1/1) ... [2022-12-13 15:01:47,886 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f6304fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:01:47, skipping insertion in model container [2022-12-13 15:01:47,886 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:01:47" (1/1) ... [2022-12-13 15:01:47,891 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 15:01:47,907 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 15:01:48,024 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:01:48,025 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:01:48,028 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:01:48,029 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:01:48,033 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_930ba681-46ff-46fe-bea8-366c17f6f302/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2022-12-13 15:01:48,041 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:01:48,048 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 15:01:48,057 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:01:48,058 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:01:48,059 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:01:48,059 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:01:48,061 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_930ba681-46ff-46fe-bea8-366c17f6f302/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2022-12-13 15:01:48,065 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:01:48,076 INFO L208 MainTranslator]: Completed translation [2022-12-13 15:01:48,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:01:48 WrapperNode [2022-12-13 15:01:48,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 15:01:48,077 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 15:01:48,077 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 15:01:48,077 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 15:01:48,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:01:48" (1/1) ... [2022-12-13 15:01:48,088 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:01:48" (1/1) ... [2022-12-13 15:01:48,104 INFO L138 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 138 [2022-12-13 15:01:48,104 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 15:01:48,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 15:01:48,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 15:01:48,105 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 15:01:48,112 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:01:48" (1/1) ... [2022-12-13 15:01:48,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:01:48" (1/1) ... [2022-12-13 15:01:48,114 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:01:48" (1/1) ... [2022-12-13 15:01:48,114 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:01:48" (1/1) ... [2022-12-13 15:01:48,118 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:01:48" (1/1) ... [2022-12-13 15:01:48,120 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:01:48" (1/1) ... [2022-12-13 15:01:48,122 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:01:48" (1/1) ... [2022-12-13 15:01:48,123 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:01:48" (1/1) ... [2022-12-13 15:01:48,124 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 15:01:48,125 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 15:01:48,125 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 15:01:48,125 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 15:01:48,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:01:48" (1/1) ... [2022-12-13 15:01:48,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:01:48,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:01:48,149 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 15:01:48,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 15:01:48,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 15:01:48,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 15:01:48,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 15:01:48,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 15:01:48,183 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 15:01:48,183 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 15:01:48,183 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 15:01:48,184 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 15:01:48,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 15:01:48,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 15:01:48,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 15:01:48,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 15:01:48,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 15:01:48,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 15:01:48,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 15:01:48,186 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 15:01:48,272 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 15:01:48,274 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 15:01:48,485 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 15:01:48,572 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 15:01:48,572 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 15:01:48,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:01:48 BoogieIcfgContainer [2022-12-13 15:01:48,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 15:01:48,576 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 15:01:48,576 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 15:01:48,578 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 15:01:48,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 03:01:47" (1/3) ... [2022-12-13 15:01:48,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c2f4dba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:01:48, skipping insertion in model container [2022-12-13 15:01:48,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:01:48" (2/3) ... [2022-12-13 15:01:48,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c2f4dba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:01:48, skipping insertion in model container [2022-12-13 15:01:48,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:01:48" (3/3) ... [2022-12-13 15:01:48,581 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2022-12-13 15:01:48,587 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 15:01:48,595 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 15:01:48,595 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 15:01:48,595 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 15:01:48,630 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 15:01:48,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 117 transitions, 250 flow [2022-12-13 15:01:48,689 INFO L130 PetriNetUnfolder]: 9/115 cut-off events. [2022-12-13 15:01:48,690 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 15:01:48,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 115 events. 9/115 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 64 event pairs, 0 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 80. Up to 2 conditions per place. [2022-12-13 15:01:48,693 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 117 transitions, 250 flow [2022-12-13 15:01:48,696 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 106 transitions, 224 flow [2022-12-13 15:01:48,699 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:01:48,706 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 106 transitions, 224 flow [2022-12-13 15:01:48,708 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 106 transitions, 224 flow [2022-12-13 15:01:48,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 106 transitions, 224 flow [2022-12-13 15:01:48,726 INFO L130 PetriNetUnfolder]: 9/106 cut-off events. [2022-12-13 15:01:48,726 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 15:01:48,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 106 events. 9/106 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 64 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 80. Up to 2 conditions per place. [2022-12-13 15:01:48,727 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2022-12-13 15:01:51,456 INFO L134 LiptonReduction]: Checked pairs total: 597 [2022-12-13 15:01:51,456 INFO L136 LiptonReduction]: Total number of compositions: 105 [2022-12-13 15:01:51,469 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:01:51,474 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;@52a543a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:01:51,474 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 15:01:51,479 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2022-12-13 15:01:51,479 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 15:01:51,479 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:01:51,480 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:51,480 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:01:51,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:51,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1828931281, now seen corresponding path program 1 times [2022-12-13 15:01:51,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:51,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774133331] [2022-12-13 15:01:51,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:51,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:51,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:51,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:51,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774133331] [2022-12-13 15:01:51,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774133331] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:01:51,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:01:51,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:01:51,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730016209] [2022-12-13 15:01:51,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:01:51,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:01:51,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:51,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:01:51,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:01:51,751 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 222 [2022-12-13 15:01:51,754 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 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) [2022-12-13 15:01:51,754 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:01:51,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 222 [2022-12-13 15:01:51,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:01:51,801 INFO L130 PetriNetUnfolder]: 66/116 cut-off events. [2022-12-13 15:01:51,801 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-12-13 15:01:51,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 116 events. 66/116 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 320 event pairs, 9 based on Foata normal form. 1/76 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2022-12-13 15:01:51,803 INFO L137 encePairwiseOnDemand]: 218/222 looper letters, 21 selfloop transitions, 3 changer transitions 1/27 dead transitions. [2022-12-13 15:01:51,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 27 transitions, 125 flow [2022-12-13 15:01:51,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:01:51,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:01:51,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 335 transitions. [2022-12-13 15:01:51,814 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.503003003003003 [2022-12-13 15:01:51,815 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 335 transitions. [2022-12-13 15:01:51,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 335 transitions. [2022-12-13 15:01:51,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:01:51,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 335 transitions. [2022-12-13 15:01:51,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 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) [2022-12-13 15:01:51,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 222.0) internal successors, (888), 4 states have internal predecessors, (888), 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) [2022-12-13 15:01:51,824 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 222.0) internal successors, (888), 4 states have internal predecessors, (888), 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) [2022-12-13 15:01:51,826 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 335 transitions. [2022-12-13 15:01:51,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 27 transitions, 125 flow [2022-12-13 15:01:51,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 27 transitions, 111 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 15:01:51,829 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 57 flow [2022-12-13 15:01:51,831 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2022-12-13 15:01:51,834 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2022-12-13 15:01:51,834 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 57 flow [2022-12-13 15:01:51,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 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) [2022-12-13 15:01:51,834 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:01:51,834 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:51,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 15:01:51,835 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:01:51,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:51,835 INFO L85 PathProgramCache]: Analyzing trace with hash -2102255140, now seen corresponding path program 1 times [2022-12-13 15:01:51,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:51,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893015778] [2022-12-13 15:01:51,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:51,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:51,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:51,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:51,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:51,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893015778] [2022-12-13 15:01:51,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893015778] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:01:51,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:01:51,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:01:51,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160889193] [2022-12-13 15:01:51,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:01:51,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 15:01:51,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:51,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 15:01:51,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:01:52,012 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 222 [2022-12-13 15:01:52,013 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 57 flow. Second operand has 5 states, 5 states have (on average 97.8) internal successors, (489), 5 states have internal predecessors, (489), 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) [2022-12-13 15:01:52,013 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:01:52,013 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 222 [2022-12-13 15:01:52,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:01:52,106 INFO L130 PetriNetUnfolder]: 113/217 cut-off events. [2022-12-13 15:01:52,106 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2022-12-13 15:01:52,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521 conditions, 217 events. 113/217 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 811 event pairs, 48 based on Foata normal form. 12/227 useless extension candidates. Maximal degree in co-relation 168. Up to 122 conditions per place. [2022-12-13 15:01:52,108 INFO L137 encePairwiseOnDemand]: 217/222 looper letters, 35 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2022-12-13 15:01:52,108 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 40 transitions, 194 flow [2022-12-13 15:01:52,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:01:52,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 15:01:52,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 511 transitions. [2022-12-13 15:01:52,112 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4603603603603604 [2022-12-13 15:01:52,112 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 511 transitions. [2022-12-13 15:01:52,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 511 transitions. [2022-12-13 15:01:52,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:01:52,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 511 transitions. [2022-12-13 15:01:52,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 102.2) internal successors, (511), 5 states have internal predecessors, (511), 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) [2022-12-13 15:01:52,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 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) [2022-12-13 15:01:52,116 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 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) [2022-12-13 15:01:52,116 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 57 flow. Second operand 5 states and 511 transitions. [2022-12-13 15:01:52,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 40 transitions, 194 flow [2022-12-13 15:01:52,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:01:52,117 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 84 flow [2022-12-13 15:01:52,117 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=84, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2022-12-13 15:01:52,118 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2022-12-13 15:01:52,118 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 84 flow [2022-12-13 15:01:52,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 97.8) internal successors, (489), 5 states have internal predecessors, (489), 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) [2022-12-13 15:01:52,118 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:01:52,118 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:52,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 15:01:52,118 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:01:52,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:52,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1452838095, now seen corresponding path program 1 times [2022-12-13 15:01:52,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:52,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035756822] [2022-12-13 15:01:52,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:52,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:52,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:52,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:52,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:52,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035756822] [2022-12-13 15:01:52,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035756822] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:01:52,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:01:52,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:01:52,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390713319] [2022-12-13 15:01:52,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:01:52,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 15:01:52,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:52,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 15:01:52,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:01:52,247 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 222 [2022-12-13 15:01:52,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 97.8) internal successors, (489), 5 states have internal predecessors, (489), 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) [2022-12-13 15:01:52,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:01:52,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 222 [2022-12-13 15:01:52,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:01:52,316 INFO L130 PetriNetUnfolder]: 79/161 cut-off events. [2022-12-13 15:01:52,316 INFO L131 PetriNetUnfolder]: For 65/70 co-relation queries the response was YES. [2022-12-13 15:01:52,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402 conditions, 161 events. 79/161 cut-off events. For 65/70 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 546 event pairs, 40 based on Foata normal form. 11/160 useless extension candidates. Maximal degree in co-relation 300. Up to 116 conditions per place. [2022-12-13 15:01:52,318 INFO L137 encePairwiseOnDemand]: 217/222 looper letters, 17 selfloop transitions, 2 changer transitions 16/36 dead transitions. [2022-12-13 15:01:52,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 36 transitions, 185 flow [2022-12-13 15:01:52,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:01:52,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 15:01:52,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 508 transitions. [2022-12-13 15:01:52,320 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45765765765765765 [2022-12-13 15:01:52,320 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 508 transitions. [2022-12-13 15:01:52,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 508 transitions. [2022-12-13 15:01:52,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:01:52,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 508 transitions. [2022-12-13 15:01:52,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 101.6) internal successors, (508), 5 states have internal predecessors, (508), 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) [2022-12-13 15:01:52,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 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) [2022-12-13 15:01:52,324 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 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) [2022-12-13 15:01:52,324 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 84 flow. Second operand 5 states and 508 transitions. [2022-12-13 15:01:52,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 36 transitions, 185 flow [2022-12-13 15:01:52,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 36 transitions, 179 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 15:01:52,325 INFO L231 Difference]: Finished difference. Result has 31 places, 20 transitions, 74 flow [2022-12-13 15:01:52,325 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=74, PETRI_PLACES=31, PETRI_TRANSITIONS=20} [2022-12-13 15:01:52,325 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2022-12-13 15:01:52,326 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 20 transitions, 74 flow [2022-12-13 15:01:52,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 97.8) internal successors, (489), 5 states have internal predecessors, (489), 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) [2022-12-13 15:01:52,326 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:01:52,326 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:52,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 15:01:52,326 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:01:52,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:52,327 INFO L85 PathProgramCache]: Analyzing trace with hash -360275054, now seen corresponding path program 1 times [2022-12-13 15:01:52,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:52,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418260122] [2022-12-13 15:01:52,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:52,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:52,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:52,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:01:52,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:52,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418260122] [2022-12-13 15:01:52,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418260122] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:01:52,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870591153] [2022-12-13 15:01:52,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:52,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:52,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:01:52,416 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:01:52,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 15:01:52,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:52,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 15:01:52,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:01:52,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:01:52,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:01:52,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:01:52,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870591153] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 15:01:52,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:01:52,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2022-12-13 15:01:52,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746423513] [2022-12-13 15:01:52,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:01:52,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 15:01:52,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:52,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 15:01:52,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-13 15:01:52,616 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 222 [2022-12-13 15:01:52,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 20 transitions, 74 flow. Second operand has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 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) [2022-12-13 15:01:52,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:01:52,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 222 [2022-12-13 15:01:52,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:01:52,680 INFO L130 PetriNetUnfolder]: 68/122 cut-off events. [2022-12-13 15:01:52,681 INFO L131 PetriNetUnfolder]: For 47/47 co-relation queries the response was YES. [2022-12-13 15:01:52,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 122 events. 68/122 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 333 event pairs, 23 based on Foata normal form. 12/133 useless extension candidates. Maximal degree in co-relation 312. Up to 92 conditions per place. [2022-12-13 15:01:52,682 INFO L137 encePairwiseOnDemand]: 217/222 looper letters, 21 selfloop transitions, 5 changer transitions 0/27 dead transitions. [2022-12-13 15:01:52,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 149 flow [2022-12-13 15:01:52,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:01:52,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 15:01:52,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 484 transitions. [2022-12-13 15:01:52,684 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.436036036036036 [2022-12-13 15:01:52,684 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 484 transitions. [2022-12-13 15:01:52,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 484 transitions. [2022-12-13 15:01:52,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:01:52,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 484 transitions. [2022-12-13 15:01:52,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 96.8) internal successors, (484), 5 states have internal predecessors, (484), 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) [2022-12-13 15:01:52,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 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) [2022-12-13 15:01:52,689 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 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) [2022-12-13 15:01:52,689 INFO L175 Difference]: Start difference. First operand has 31 places, 20 transitions, 74 flow. Second operand 5 states and 484 transitions. [2022-12-13 15:01:52,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 149 flow [2022-12-13 15:01:52,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 27 transitions, 133 flow, removed 6 selfloop flow, removed 6 redundant places. [2022-12-13 15:01:52,691 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 81 flow [2022-12-13 15:01:52,691 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=81, PETRI_PLACES=26, PETRI_TRANSITIONS=21} [2022-12-13 15:01:52,691 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2022-12-13 15:01:52,691 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 81 flow [2022-12-13 15:01:52,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 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) [2022-12-13 15:01:52,692 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:01:52,692 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:52,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 15:01:52,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:52,894 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:01:52,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:52,895 INFO L85 PathProgramCache]: Analyzing trace with hash 345485819, now seen corresponding path program 1 times [2022-12-13 15:01:52,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:52,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279111946] [2022-12-13 15:01:52,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:52,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:52,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:53,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:01:53,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:53,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279111946] [2022-12-13 15:01:53,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279111946] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:01:53,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484266132] [2022-12-13 15:01:53,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:53,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:53,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:01:53,078 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:01:53,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 15:01:53,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:53,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 15:01:53,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:01:53,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:01:53,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:01:53,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:01:53,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484266132] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 15:01:53,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:01:53,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2022-12-13 15:01:53,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345186414] [2022-12-13 15:01:53,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:01:53,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 15:01:53,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:53,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 15:01:53,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-13 15:01:53,227 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 222 [2022-12-13 15:01:53,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 81 flow. Second operand has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 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) [2022-12-13 15:01:53,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:01:53,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 222 [2022-12-13 15:01:53,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:01:53,272 INFO L130 PetriNetUnfolder]: 52/97 cut-off events. [2022-12-13 15:01:53,272 INFO L131 PetriNetUnfolder]: For 56/63 co-relation queries the response was YES. [2022-12-13 15:01:53,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 97 events. 52/97 cut-off events. For 56/63 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 216 event pairs, 20 based on Foata normal form. 15/108 useless extension candidates. Maximal degree in co-relation 267. Up to 75 conditions per place. [2022-12-13 15:01:53,273 INFO L137 encePairwiseOnDemand]: 217/222 looper letters, 22 selfloop transitions, 5 changer transitions 0/28 dead transitions. [2022-12-13 15:01:53,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 28 transitions, 163 flow [2022-12-13 15:01:53,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:01:53,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 15:01:53,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 484 transitions. [2022-12-13 15:01:53,275 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.436036036036036 [2022-12-13 15:01:53,275 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 484 transitions. [2022-12-13 15:01:53,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 484 transitions. [2022-12-13 15:01:53,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:01:53,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 484 transitions. [2022-12-13 15:01:53,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 96.8) internal successors, (484), 5 states have internal predecessors, (484), 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) [2022-12-13 15:01:53,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 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) [2022-12-13 15:01:53,280 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 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) [2022-12-13 15:01:53,280 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 81 flow. Second operand 5 states and 484 transitions. [2022-12-13 15:01:53,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 28 transitions, 163 flow [2022-12-13 15:01:53,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 28 transitions, 149 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-12-13 15:01:53,281 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 91 flow [2022-12-13 15:01:53,281 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2022-12-13 15:01:53,282 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2022-12-13 15:01:53,282 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 91 flow [2022-12-13 15:01:53,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 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) [2022-12-13 15:01:53,283 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:01:53,283 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:53,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 15:01:53,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:53,483 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:01:53,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:53,484 INFO L85 PathProgramCache]: Analyzing trace with hash -201200695, now seen corresponding path program 1 times [2022-12-13 15:01:53,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:53,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437677623] [2022-12-13 15:01:53,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:53,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:53,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:53,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:01:53,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:53,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437677623] [2022-12-13 15:01:53,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437677623] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:01:53,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15601738] [2022-12-13 15:01:53,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:53,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:53,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:01:53,899 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:01:53,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 15:01:53,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:53,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-13 15:01:53,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:01:54,018 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 11 treesize of output 7 [2022-12-13 15:01:54,051 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 6 treesize of output 5 [2022-12-13 15:01:54,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:01:54,121 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 14 treesize of output 16 [2022-12-13 15:01:54,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:54,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:01:54,257 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_133 (Array Int Int))) (<= c_~counter~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset))) (forall ((v_ArrVal_133 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset) (+ c_~counter~0 1)))) is different from false [2022-12-13 15:01:54,395 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_133 (Array Int Int)) (v_ArrVal_132 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_132))) (<= (+ c_~counter~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (forall ((v_ArrVal_133 (Array Int Int)) (v_ArrVal_132 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_132))) (< (select (select (store .cse1 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) (+ c_~counter~0 (select (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 1))))) is different from false [2022-12-13 15:01:54,406 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:01:54,407 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 46 treesize of output 35 [2022-12-13 15:01:54,412 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 286 treesize of output 254 [2022-12-13 15:01:54,418 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 254 treesize of output 238 [2022-12-13 15:01:54,424 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 238 treesize of output 222 [2022-12-13 15:01:54,870 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:01:54,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2022-12-13 15:01:54,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:01:54,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 64 treesize of output 56 [2022-12-13 15:01:54,877 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 56 treesize of output 52 [2022-12-13 15:01:54,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-12-13 15:01:54,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15601738] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:01:54,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:01:54,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2022-12-13 15:01:54,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187223576] [2022-12-13 15:01:54,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:01:54,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 15:01:54,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:54,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 15:01:54,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=266, Unknown=11, NotChecked=70, Total=420 [2022-12-13 15:01:55,007 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 222 [2022-12-13 15:01:55,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 91 flow. Second operand has 21 states, 21 states have (on average 69.61904761904762) internal successors, (1462), 21 states have internal predecessors, (1462), 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) [2022-12-13 15:01:55,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:01:55,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 222 [2022-12-13 15:01:55,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:01:55,327 INFO L130 PetriNetUnfolder]: 110/198 cut-off events. [2022-12-13 15:01:55,327 INFO L131 PetriNetUnfolder]: For 98/98 co-relation queries the response was YES. [2022-12-13 15:01:55,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 198 events. 110/198 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 586 event pairs, 1 based on Foata normal form. 1/198 useless extension candidates. Maximal degree in co-relation 587. Up to 115 conditions per place. [2022-12-13 15:01:55,329 INFO L137 encePairwiseOnDemand]: 215/222 looper letters, 41 selfloop transitions, 13 changer transitions 1/55 dead transitions. [2022-12-13 15:01:55,329 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 55 transitions, 313 flow [2022-12-13 15:01:55,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:01:55,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 15:01:55,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 598 transitions. [2022-12-13 15:01:55,331 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3367117117117117 [2022-12-13 15:01:55,331 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 598 transitions. [2022-12-13 15:01:55,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 598 transitions. [2022-12-13 15:01:55,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:01:55,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 598 transitions. [2022-12-13 15:01:55,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 74.75) internal successors, (598), 8 states have internal predecessors, (598), 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) [2022-12-13 15:01:55,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 222.0) internal successors, (1998), 9 states have internal predecessors, (1998), 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) [2022-12-13 15:01:55,335 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 222.0) internal successors, (1998), 9 states have internal predecessors, (1998), 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) [2022-12-13 15:01:55,335 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 91 flow. Second operand 8 states and 598 transitions. [2022-12-13 15:01:55,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 55 transitions, 313 flow [2022-12-13 15:01:55,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 55 transitions, 301 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-12-13 15:01:55,337 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 172 flow [2022-12-13 15:01:55,337 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=172, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2022-12-13 15:01:55,337 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2022-12-13 15:01:55,338 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 172 flow [2022-12-13 15:01:55,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 69.61904761904762) internal successors, (1462), 21 states have internal predecessors, (1462), 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) [2022-12-13 15:01:55,339 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:01:55,339 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:55,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 15:01:55,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:55,539 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:01:55,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:55,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1542630223, now seen corresponding path program 2 times [2022-12-13 15:01:55,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:55,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903862533] [2022-12-13 15:01:55,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:55,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:55,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:55,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:01:55,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:55,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903862533] [2022-12-13 15:01:55,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903862533] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:01:55,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469065138] [2022-12-13 15:01:55,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:01:55,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:55,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:01:55,895 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:01:55,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 15:01:55,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:01:55,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:01:55,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-13 15:01:55,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:01:56,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:01:56,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:01:56,106 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:01:56,106 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 22 treesize of output 19 [2022-12-13 15:01:56,117 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-12-13 15:01:56,118 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 21 treesize of output 10 [2022-12-13 15:01:56,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:01:56,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469065138] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:01:56,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:01:56,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2022-12-13 15:01:56,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403404505] [2022-12-13 15:01:56,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:01:56,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 15:01:56,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:56,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 15:01:56,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-12-13 15:01:56,314 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 222 [2022-12-13 15:01:56,315 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 172 flow. Second operand has 11 states, 11 states have (on average 94.81818181818181) internal successors, (1043), 11 states have internal predecessors, (1043), 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) [2022-12-13 15:01:56,315 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:01:56,316 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 222 [2022-12-13 15:01:56,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:01:56,496 INFO L130 PetriNetUnfolder]: 137/246 cut-off events. [2022-12-13 15:01:56,496 INFO L131 PetriNetUnfolder]: For 273/273 co-relation queries the response was YES. [2022-12-13 15:01:56,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 892 conditions, 246 events. 137/246 cut-off events. For 273/273 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 776 event pairs, 25 based on Foata normal form. 1/246 useless extension candidates. Maximal degree in co-relation 868. Up to 190 conditions per place. [2022-12-13 15:01:56,499 INFO L137 encePairwiseOnDemand]: 216/222 looper letters, 41 selfloop transitions, 13 changer transitions 1/55 dead transitions. [2022-12-13 15:01:56,499 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 55 transitions, 387 flow [2022-12-13 15:01:56,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:01:56,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 15:01:56,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 689 transitions. [2022-12-13 15:01:56,500 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44337194337194336 [2022-12-13 15:01:56,501 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 689 transitions. [2022-12-13 15:01:56,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 689 transitions. [2022-12-13 15:01:56,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:01:56,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 689 transitions. [2022-12-13 15:01:56,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 98.42857142857143) internal successors, (689), 7 states have internal predecessors, (689), 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) [2022-12-13 15:01:56,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 222.0) internal successors, (1776), 8 states have internal predecessors, (1776), 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) [2022-12-13 15:01:56,504 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 222.0) internal successors, (1776), 8 states have internal predecessors, (1776), 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) [2022-12-13 15:01:56,504 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 172 flow. Second operand 7 states and 689 transitions. [2022-12-13 15:01:56,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 55 transitions, 387 flow [2022-12-13 15:01:56,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 55 transitions, 362 flow, removed 8 selfloop flow, removed 2 redundant places. [2022-12-13 15:01:56,507 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 266 flow [2022-12-13 15:01:56,507 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=266, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2022-12-13 15:01:56,508 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2022-12-13 15:01:56,508 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 266 flow [2022-12-13 15:01:56,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 94.81818181818181) internal successors, (1043), 11 states have internal predecessors, (1043), 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) [2022-12-13 15:01:56,509 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:01:56,509 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:56,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 15:01:56,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 15:01:56,710 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:01:56,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:56,711 INFO L85 PathProgramCache]: Analyzing trace with hash 976741349, now seen corresponding path program 3 times [2022-12-13 15:01:56,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:56,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817909961] [2022-12-13 15:01:56,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:56,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:57,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:57,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:57,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817909961] [2022-12-13 15:01:57,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817909961] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:01:57,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381471330] [2022-12-13 15:01:57,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:01:57,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:57,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:01:57,276 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:01:57,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 15:01:57,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 15:01:57,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:01:57,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-13 15:01:57,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:01:57,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:01:57,381 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:01:57,381 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 35 treesize of output 14 [2022-12-13 15:01:57,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:01:57,396 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:01:57,396 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 35 treesize of output 14 [2022-12-13 15:01:57,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:01:57,409 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:01:57,410 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 35 treesize of output 14 [2022-12-13 15:01:57,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:01:57,424 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:01:57,424 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 35 treesize of output 14 [2022-12-13 15:01:57,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:01:57,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:01:57,507 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:01:57,508 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 22 treesize of output 19 [2022-12-13 15:01:57,516 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-12-13 15:01:57,516 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 21 treesize of output 10 [2022-12-13 15:01:57,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:01:57,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381471330] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:01:57,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:01:57,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 4] total 13 [2022-12-13 15:01:57,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628576109] [2022-12-13 15:01:57,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:01:57,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 15:01:57,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:57,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 15:01:57,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-12-13 15:01:57,861 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 222 [2022-12-13 15:01:57,862 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 266 flow. Second operand has 15 states, 15 states have (on average 87.33333333333333) internal successors, (1310), 15 states have internal predecessors, (1310), 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) [2022-12-13 15:01:57,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:01:57,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 222 [2022-12-13 15:01:57,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:01:58,075 INFO L130 PetriNetUnfolder]: 159/285 cut-off events. [2022-12-13 15:01:58,076 INFO L131 PetriNetUnfolder]: For 489/489 co-relation queries the response was YES. [2022-12-13 15:01:58,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1115 conditions, 285 events. 159/285 cut-off events. For 489/489 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 944 event pairs, 35 based on Foata normal form. 1/285 useless extension candidates. Maximal degree in co-relation 1087. Up to 233 conditions per place. [2022-12-13 15:01:58,077 INFO L137 encePairwiseOnDemand]: 215/222 looper letters, 44 selfloop transitions, 15 changer transitions 1/60 dead transitions. [2022-12-13 15:01:58,077 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 60 transitions, 470 flow [2022-12-13 15:01:58,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:01:58,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 15:01:58,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 726 transitions. [2022-12-13 15:01:58,081 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40878378378378377 [2022-12-13 15:01:58,081 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 726 transitions. [2022-12-13 15:01:58,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 726 transitions. [2022-12-13 15:01:58,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:01:58,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 726 transitions. [2022-12-13 15:01:58,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 90.75) internal successors, (726), 8 states have internal predecessors, (726), 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) [2022-12-13 15:01:58,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 222.0) internal successors, (1998), 9 states have internal predecessors, (1998), 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) [2022-12-13 15:01:58,084 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 222.0) internal successors, (1998), 9 states have internal predecessors, (1998), 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) [2022-12-13 15:01:58,084 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 266 flow. Second operand 8 states and 726 transitions. [2022-12-13 15:01:58,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 60 transitions, 470 flow [2022-12-13 15:01:58,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 60 transitions, 449 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 15:01:58,087 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 341 flow [2022-12-13 15:01:58,087 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=341, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2022-12-13 15:01:58,087 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 31 predicate places. [2022-12-13 15:01:58,087 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 341 flow [2022-12-13 15:01:58,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 87.33333333333333) internal successors, (1310), 15 states have internal predecessors, (1310), 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) [2022-12-13 15:01:58,088 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:01:58,088 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:58,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-13 15:01:58,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-13 15:01:58,289 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:01:58,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:58,289 INFO L85 PathProgramCache]: Analyzing trace with hash 625445091, now seen corresponding path program 4 times [2022-12-13 15:01:58,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:58,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836247582] [2022-12-13 15:01:58,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:58,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:58,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:58,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:01:58,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:58,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836247582] [2022-12-13 15:01:58,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836247582] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:01:58,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113259746] [2022-12-13 15:01:58,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:01:58,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:58,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:01:58,504 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:01:58,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 15:01:58,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:01:58,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:01:58,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-13 15:01:58,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:01:58,602 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 11 treesize of output 7 [2022-12-13 15:01:58,627 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 6 treesize of output 5 [2022-12-13 15:01:58,649 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 6 treesize of output 5 [2022-12-13 15:01:58,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:58,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:01:58,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:01:58,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113259746] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:01:58,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:01:58,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 4] total 12 [2022-12-13 15:01:58,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508589365] [2022-12-13 15:01:58,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:01:58,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 15:01:58,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:58,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 15:01:58,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-12-13 15:01:59,087 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 222 [2022-12-13 15:01:59,088 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 341 flow. Second operand has 14 states, 14 states have (on average 87.42857142857143) internal successors, (1224), 14 states have internal predecessors, (1224), 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) [2022-12-13 15:01:59,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:01:59,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 222 [2022-12-13 15:01:59,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:01:59,303 INFO L130 PetriNetUnfolder]: 175/314 cut-off events. [2022-12-13 15:01:59,303 INFO L131 PetriNetUnfolder]: For 697/697 co-relation queries the response was YES. [2022-12-13 15:01:59,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1281 conditions, 314 events. 175/314 cut-off events. For 697/697 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1104 event pairs, 39 based on Foata normal form. 1/314 useless extension candidates. Maximal degree in co-relation 1248. Up to 258 conditions per place. [2022-12-13 15:01:59,305 INFO L137 encePairwiseOnDemand]: 215/222 looper letters, 49 selfloop transitions, 15 changer transitions 1/65 dead transitions. [2022-12-13 15:01:59,305 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 65 transitions, 549 flow [2022-12-13 15:01:59,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:01:59,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 15:01:59,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 728 transitions. [2022-12-13 15:01:59,306 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4099099099099099 [2022-12-13 15:01:59,306 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 728 transitions. [2022-12-13 15:01:59,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 728 transitions. [2022-12-13 15:01:59,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:01:59,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 728 transitions. [2022-12-13 15:01:59,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 91.0) internal successors, (728), 8 states have internal predecessors, (728), 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) [2022-12-13 15:01:59,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 222.0) internal successors, (1998), 9 states have internal predecessors, (1998), 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) [2022-12-13 15:01:59,309 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 222.0) internal successors, (1998), 9 states have internal predecessors, (1998), 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) [2022-12-13 15:01:59,309 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 341 flow. Second operand 8 states and 728 transitions. [2022-12-13 15:01:59,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 65 transitions, 549 flow [2022-12-13 15:01:59,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 65 transitions, 516 flow, removed 10 selfloop flow, removed 3 redundant places. [2022-12-13 15:01:59,312 INFO L231 Difference]: Finished difference. Result has 58 places, 48 transitions, 385 flow [2022-12-13 15:01:59,312 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=385, PETRI_PLACES=58, PETRI_TRANSITIONS=48} [2022-12-13 15:01:59,313 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 37 predicate places. [2022-12-13 15:01:59,313 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 48 transitions, 385 flow [2022-12-13 15:01:59,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 87.42857142857143) internal successors, (1224), 14 states have internal predecessors, (1224), 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) [2022-12-13 15:01:59,313 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:01:59,313 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:59,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 15:01:59,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:59,514 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:01:59,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:59,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1227205373, now seen corresponding path program 5 times [2022-12-13 15:01:59,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:59,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404865857] [2022-12-13 15:01:59,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:59,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:59,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:59,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:01:59,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:59,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404865857] [2022-12-13 15:01:59,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404865857] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:01:59,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082796820] [2022-12-13 15:01:59,732 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:01:59,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:59,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:01:59,733 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:01:59,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 15:01:59,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:01:59,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:01:59,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-13 15:01:59,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:01:59,832 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 11 treesize of output 7 [2022-12-13 15:01:59,854 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 6 treesize of output 5 [2022-12-13 15:01:59,876 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 6 treesize of output 5 [2022-12-13 15:01:59,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:59,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:02:00,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:02:00,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082796820] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:02:00,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:02:00,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 4] total 12 [2022-12-13 15:02:00,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744875799] [2022-12-13 15:02:00,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:02:00,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 15:02:00,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:00,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 15:02:00,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-12-13 15:02:00,235 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 222 [2022-12-13 15:02:00,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 48 transitions, 385 flow. Second operand has 14 states, 14 states have (on average 87.42857142857143) internal successors, (1224), 14 states have internal predecessors, (1224), 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) [2022-12-13 15:02:00,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:02:00,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 222 [2022-12-13 15:02:00,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:02:00,428 INFO L130 PetriNetUnfolder]: 209/373 cut-off events. [2022-12-13 15:02:00,428 INFO L131 PetriNetUnfolder]: For 1036/1036 co-relation queries the response was YES. [2022-12-13 15:02:00,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1575 conditions, 373 events. 209/373 cut-off events. For 1036/1036 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1373 event pairs, 35 based on Foata normal form. 1/373 useless extension candidates. Maximal degree in co-relation 1539. Up to 301 conditions per place. [2022-12-13 15:02:00,430 INFO L137 encePairwiseOnDemand]: 215/222 looper letters, 49 selfloop transitions, 19 changer transitions 1/69 dead transitions. [2022-12-13 15:02:00,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 69 transitions, 636 flow [2022-12-13 15:02:00,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:02:00,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 15:02:00,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 726 transitions. [2022-12-13 15:02:00,432 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40878378378378377 [2022-12-13 15:02:00,432 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 726 transitions. [2022-12-13 15:02:00,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 726 transitions. [2022-12-13 15:02:00,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:02:00,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 726 transitions. [2022-12-13 15:02:00,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 90.75) internal successors, (726), 8 states have internal predecessors, (726), 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) [2022-12-13 15:02:00,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 222.0) internal successors, (1998), 9 states have internal predecessors, (1998), 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) [2022-12-13 15:02:00,435 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 222.0) internal successors, (1998), 9 states have internal predecessors, (1998), 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) [2022-12-13 15:02:00,435 INFO L175 Difference]: Start difference. First operand has 58 places, 48 transitions, 385 flow. Second operand 8 states and 726 transitions. [2022-12-13 15:02:00,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 69 transitions, 636 flow [2022-12-13 15:02:00,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 69 transitions, 592 flow, removed 10 selfloop flow, removed 5 redundant places. [2022-12-13 15:02:00,439 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 474 flow [2022-12-13 15:02:00,439 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=474, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2022-12-13 15:02:00,440 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 41 predicate places. [2022-12-13 15:02:00,440 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 474 flow [2022-12-13 15:02:00,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 87.42857142857143) internal successors, (1224), 14 states have internal predecessors, (1224), 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) [2022-12-13 15:02:00,441 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:02:00,441 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:00,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 15:02:00,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 15:02:00,642 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:02:00,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:00,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1327199247, now seen corresponding path program 6 times [2022-12-13 15:02:00,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:00,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715053079] [2022-12-13 15:02:00,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:00,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:00,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:01,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:01,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:02:01,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715053079] [2022-12-13 15:02:01,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715053079] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:02:01,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069960565] [2022-12-13 15:02:01,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:02:01,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:01,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:02:01,087 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:02:01,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 15:02:01,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 15:02:01,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:02:01,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-13 15:02:01,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:02:01,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:02:01,216 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:02:01,216 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 35 treesize of output 14 [2022-12-13 15:02:01,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:02:01,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:02:01,294 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:02:01,295 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 22 treesize of output 19 [2022-12-13 15:02:01,304 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-12-13 15:02:01,305 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 21 treesize of output 10 [2022-12-13 15:02:01,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:02:01,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069960565] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:02:01,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:02:01,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 4] total 12 [2022-12-13 15:02:01,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614541269] [2022-12-13 15:02:01,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:02:01,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 15:02:01,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:01,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 15:02:01,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-13 15:02:01,612 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 222 [2022-12-13 15:02:01,613 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 55 transitions, 474 flow. Second operand has 14 states, 14 states have (on average 87.42857142857143) internal successors, (1224), 14 states have internal predecessors, (1224), 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) [2022-12-13 15:02:01,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:02:01,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 222 [2022-12-13 15:02:01,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:02:01,833 INFO L130 PetriNetUnfolder]: 225/402 cut-off events. [2022-12-13 15:02:01,833 INFO L131 PetriNetUnfolder]: For 1267/1267 co-relation queries the response was YES. [2022-12-13 15:02:01,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1744 conditions, 402 events. 225/402 cut-off events. For 1267/1267 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1520 event pairs, 57 based on Foata normal form. 1/402 useless extension candidates. Maximal degree in co-relation 1706. Up to 350 conditions per place. [2022-12-13 15:02:01,835 INFO L137 encePairwiseOnDemand]: 215/222 looper letters, 55 selfloop transitions, 15 changer transitions 1/71 dead transitions. [2022-12-13 15:02:01,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 71 transitions, 700 flow [2022-12-13 15:02:01,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:02:01,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 15:02:01,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 724 transitions. [2022-12-13 15:02:01,837 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40765765765765766 [2022-12-13 15:02:01,837 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 724 transitions. [2022-12-13 15:02:01,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 724 transitions. [2022-12-13 15:02:01,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:02:01,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 724 transitions. [2022-12-13 15:02:01,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 90.5) internal successors, (724), 8 states have internal predecessors, (724), 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) [2022-12-13 15:02:01,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 222.0) internal successors, (1998), 9 states have internal predecessors, (1998), 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) [2022-12-13 15:02:01,840 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 222.0) internal successors, (1998), 9 states have internal predecessors, (1998), 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) [2022-12-13 15:02:01,840 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 474 flow. Second operand 8 states and 724 transitions. [2022-12-13 15:02:01,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 71 transitions, 700 flow [2022-12-13 15:02:01,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 71 transitions, 631 flow, removed 28 selfloop flow, removed 3 redundant places. [2022-12-13 15:02:01,845 INFO L231 Difference]: Finished difference. Result has 68 places, 58 transitions, 498 flow [2022-12-13 15:02:01,846 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=498, PETRI_PLACES=68, PETRI_TRANSITIONS=58} [2022-12-13 15:02:01,846 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 47 predicate places. [2022-12-13 15:02:01,846 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 58 transitions, 498 flow [2022-12-13 15:02:01,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 87.42857142857143) internal successors, (1224), 14 states have internal predecessors, (1224), 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) [2022-12-13 15:02:01,847 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:02:01,847 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:01,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 15:02:02,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 15:02:02,048 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:02:02,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:02,048 INFO L85 PathProgramCache]: Analyzing trace with hash -2028468581, now seen corresponding path program 7 times [2022-12-13 15:02:02,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:02,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461012537] [2022-12-13 15:02:02,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:02,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:02,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:02,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:02:02,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:02:02,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461012537] [2022-12-13 15:02:02,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461012537] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:02:02,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646026311] [2022-12-13 15:02:02,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:02:02,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:02,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:02:02,120 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:02:02,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 15:02:02,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:02,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:02:02,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:02:02,220 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:02:02,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:02:02,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:02:02,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646026311] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:02:02,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:02:02,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-12-13 15:02:02,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727211826] [2022-12-13 15:02:02,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:02:02,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 15:02:02,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:02,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 15:02:02,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-12-13 15:02:02,342 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 222 [2022-12-13 15:02:02,343 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 58 transitions, 498 flow. Second operand has 14 states, 14 states have (on average 94.42857142857143) internal successors, (1322), 14 states have internal predecessors, (1322), 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) [2022-12-13 15:02:02,343 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:02:02,343 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 222 [2022-12-13 15:02:02,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:02:02,521 INFO L130 PetriNetUnfolder]: 371/695 cut-off events. [2022-12-13 15:02:02,522 INFO L131 PetriNetUnfolder]: For 2442/2468 co-relation queries the response was YES. [2022-12-13 15:02:02,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2877 conditions, 695 events. 371/695 cut-off events. For 2442/2468 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3425 event pairs, 82 based on Foata normal form. 56/740 useless extension candidates. Maximal degree in co-relation 2501. Up to 275 conditions per place. [2022-12-13 15:02:02,525 INFO L137 encePairwiseOnDemand]: 216/222 looper letters, 103 selfloop transitions, 16 changer transitions 0/123 dead transitions. [2022-12-13 15:02:02,525 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 123 transitions, 1233 flow [2022-12-13 15:02:02,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:02:02,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 15:02:02,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 784 transitions. [2022-12-13 15:02:02,527 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44144144144144143 [2022-12-13 15:02:02,527 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 784 transitions. [2022-12-13 15:02:02,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 784 transitions. [2022-12-13 15:02:02,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:02:02,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 784 transitions. [2022-12-13 15:02:02,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 98.0) internal successors, (784), 8 states have internal predecessors, (784), 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) [2022-12-13 15:02:02,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 222.0) internal successors, (1998), 9 states have internal predecessors, (1998), 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) [2022-12-13 15:02:02,530 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 222.0) internal successors, (1998), 9 states have internal predecessors, (1998), 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) [2022-12-13 15:02:02,530 INFO L175 Difference]: Start difference. First operand has 68 places, 58 transitions, 498 flow. Second operand 8 states and 784 transitions. [2022-12-13 15:02:02,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 123 transitions, 1233 flow [2022-12-13 15:02:02,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 123 transitions, 1131 flow, removed 28 selfloop flow, removed 6 redundant places. [2022-12-13 15:02:02,536 INFO L231 Difference]: Finished difference. Result has 74 places, 72 transitions, 665 flow [2022-12-13 15:02:02,536 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=443, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=665, PETRI_PLACES=74, PETRI_TRANSITIONS=72} [2022-12-13 15:02:02,536 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 53 predicate places. [2022-12-13 15:02:02,537 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 72 transitions, 665 flow [2022-12-13 15:02:02,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 94.42857142857143) internal successors, (1322), 14 states have internal predecessors, (1322), 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) [2022-12-13 15:02:02,537 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:02:02,537 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:02,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 15:02:02,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 15:02:02,738 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:02:02,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:02,738 INFO L85 PathProgramCache]: Analyzing trace with hash 654977204, now seen corresponding path program 8 times [2022-12-13 15:02:02,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:02,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271397512] [2022-12-13 15:02:02,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:02,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:02,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:02:02,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271397512] [2022-12-13 15:02:02,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271397512] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:02:02,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572402453] [2022-12-13 15:02:02,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:02:02,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:02,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:02:02,806 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:02:02,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 15:02:02,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:02:02,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:02:02,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:02:02,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:02:02,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:02,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:02:02,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:02,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572402453] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:02:02,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:02:02,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-12-13 15:02:02,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984604199] [2022-12-13 15:02:02,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:02:02,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 15:02:02,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:02,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 15:02:02,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-12-13 15:02:03,066 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 222 [2022-12-13 15:02:03,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 665 flow. Second operand has 14 states, 14 states have (on average 94.14285714285714) internal successors, (1318), 14 states have internal predecessors, (1318), 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) [2022-12-13 15:02:03,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:02:03,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 222 [2022-12-13 15:02:03,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:02:03,238 INFO L130 PetriNetUnfolder]: 305/610 cut-off events. [2022-12-13 15:02:03,238 INFO L131 PetriNetUnfolder]: For 1764/1793 co-relation queries the response was YES. [2022-12-13 15:02:03,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2560 conditions, 610 events. 305/610 cut-off events. For 1764/1793 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3076 event pairs, 89 based on Foata normal form. 55/662 useless extension candidates. Maximal degree in co-relation 2225. Up to 251 conditions per place. [2022-12-13 15:02:03,241 INFO L137 encePairwiseOnDemand]: 216/222 looper letters, 66 selfloop transitions, 4 changer transitions 36/110 dead transitions. [2022-12-13 15:02:03,241 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 110 transitions, 1102 flow [2022-12-13 15:02:03,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:02:03,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 15:02:03,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 783 transitions. [2022-12-13 15:02:03,243 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4408783783783784 [2022-12-13 15:02:03,243 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 783 transitions. [2022-12-13 15:02:03,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 783 transitions. [2022-12-13 15:02:03,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:02:03,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 783 transitions. [2022-12-13 15:02:03,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 97.875) internal successors, (783), 8 states have internal predecessors, (783), 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) [2022-12-13 15:02:03,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 222.0) internal successors, (1998), 9 states have internal predecessors, (1998), 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) [2022-12-13 15:02:03,246 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 222.0) internal successors, (1998), 9 states have internal predecessors, (1998), 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) [2022-12-13 15:02:03,246 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 665 flow. Second operand 8 states and 783 transitions. [2022-12-13 15:02:03,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 110 transitions, 1102 flow [2022-12-13 15:02:03,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 110 transitions, 1090 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-12-13 15:02:03,252 INFO L231 Difference]: Finished difference. Result has 83 places, 59 transitions, 546 flow [2022-12-13 15:02:03,252 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=633, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=546, PETRI_PLACES=83, PETRI_TRANSITIONS=59} [2022-12-13 15:02:03,252 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 62 predicate places. [2022-12-13 15:02:03,253 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 59 transitions, 546 flow [2022-12-13 15:02:03,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 94.14285714285714) internal successors, (1318), 14 states have internal predecessors, (1318), 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) [2022-12-13 15:02:03,253 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:02:03,253 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:03,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 15:02:03,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 15:02:03,454 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:02:03,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:03,455 INFO L85 PathProgramCache]: Analyzing trace with hash 163471994, now seen corresponding path program 9 times [2022-12-13 15:02:03,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:03,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507387509] [2022-12-13 15:02:03,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:03,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:03,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:03,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:02:03,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:02:03,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507387509] [2022-12-13 15:02:03,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507387509] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:02:03,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317541796] [2022-12-13 15:02:03,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:02:03,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:03,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:02:03,527 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:02:03,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 15:02:03,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 15:02:03,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:02:03,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:02:03,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:02:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:02:03,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:02:03,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:02:03,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317541796] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:02:03,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:02:03,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-12-13 15:02:03,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516847194] [2022-12-13 15:02:03,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:02:03,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 15:02:03,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:03,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 15:02:03,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-12-13 15:02:03,848 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 222 [2022-12-13 15:02:03,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 59 transitions, 546 flow. Second operand has 14 states, 14 states have (on average 94.21428571428571) internal successors, (1319), 14 states have internal predecessors, (1319), 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) [2022-12-13 15:02:03,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:02:03,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 222 [2022-12-13 15:02:03,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:02:03,980 INFO L130 PetriNetUnfolder]: 166/297 cut-off events. [2022-12-13 15:02:03,980 INFO L131 PetriNetUnfolder]: For 1506/1513 co-relation queries the response was YES. [2022-12-13 15:02:03,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1566 conditions, 297 events. 166/297 cut-off events. For 1506/1513 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1033 event pairs, 28 based on Foata normal form. 51/347 useless extension candidates. Maximal degree in co-relation 1510. Up to 139 conditions per place. [2022-12-13 15:02:03,984 INFO L137 encePairwiseOnDemand]: 217/222 looper letters, 41 selfloop transitions, 25 changer transitions 0/70 dead transitions. [2022-12-13 15:02:03,984 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 70 transitions, 764 flow [2022-12-13 15:02:03,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:02:03,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 15:02:03,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 675 transitions. [2022-12-13 15:02:03,985 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4343629343629344 [2022-12-13 15:02:03,985 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 675 transitions. [2022-12-13 15:02:03,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 675 transitions. [2022-12-13 15:02:03,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:02:03,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 675 transitions. [2022-12-13 15:02:03,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 96.42857142857143) internal successors, (675), 7 states have internal predecessors, (675), 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) [2022-12-13 15:02:03,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 222.0) internal successors, (1776), 8 states have internal predecessors, (1776), 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) [2022-12-13 15:02:03,988 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 222.0) internal successors, (1776), 8 states have internal predecessors, (1776), 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) [2022-12-13 15:02:03,988 INFO L175 Difference]: Start difference. First operand has 83 places, 59 transitions, 546 flow. Second operand 7 states and 675 transitions. [2022-12-13 15:02:03,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 70 transitions, 764 flow [2022-12-13 15:02:03,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 70 transitions, 611 flow, removed 68 selfloop flow, removed 11 redundant places. [2022-12-13 15:02:03,993 INFO L231 Difference]: Finished difference. Result has 73 places, 60 transitions, 491 flow [2022-12-13 15:02:03,993 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=491, PETRI_PLACES=73, PETRI_TRANSITIONS=60} [2022-12-13 15:02:03,993 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 52 predicate places. [2022-12-13 15:02:03,993 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 60 transitions, 491 flow [2022-12-13 15:02:03,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 94.21428571428571) internal successors, (1319), 14 states have internal predecessors, (1319), 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) [2022-12-13 15:02:03,994 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:02:03,994 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:03,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 15:02:04,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:04,195 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:02:04,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:04,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1595131935, now seen corresponding path program 10 times [2022-12-13 15:02:04,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:04,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682001454] [2022-12-13 15:02:04,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:04,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:04,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:04,393 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:02:04,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:02:04,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682001454] [2022-12-13 15:02:04,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682001454] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:02:04,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666072143] [2022-12-13 15:02:04,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:02:04,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:04,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:02:04,394 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:02:04,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 15:02:04,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:02:04,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:02:04,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:02:04,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:02:04,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:02:04,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:02:04,546 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:02:04,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666072143] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:02:04,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:02:04,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-12-13 15:02:04,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311552575] [2022-12-13 15:02:04,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:02:04,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 15:02:04,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:04,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 15:02:04,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2022-12-13 15:02:04,651 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 222 [2022-12-13 15:02:04,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 60 transitions, 491 flow. Second operand has 15 states, 15 states have (on average 94.06666666666666) internal successors, (1411), 15 states have internal predecessors, (1411), 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) [2022-12-13 15:02:04,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:02:04,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 222 [2022-12-13 15:02:04,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:02:04,753 INFO L130 PetriNetUnfolder]: 120/214 cut-off events. [2022-12-13 15:02:04,753 INFO L131 PetriNetUnfolder]: For 1248/1254 co-relation queries the response was YES. [2022-12-13 15:02:04,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1181 conditions, 214 events. 120/214 cut-off events. For 1248/1254 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 642 event pairs, 27 based on Foata normal form. 30/239 useless extension candidates. Maximal degree in co-relation 1133. Up to 118 conditions per place. [2022-12-13 15:02:04,754 INFO L137 encePairwiseOnDemand]: 217/222 looper letters, 42 selfloop transitions, 25 changer transitions 0/71 dead transitions. [2022-12-13 15:02:04,755 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 71 transitions, 711 flow [2022-12-13 15:02:04,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:02:04,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 15:02:04,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 675 transitions. [2022-12-13 15:02:04,756 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4343629343629344 [2022-12-13 15:02:04,756 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 675 transitions. [2022-12-13 15:02:04,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 675 transitions. [2022-12-13 15:02:04,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:02:04,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 675 transitions. [2022-12-13 15:02:04,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 96.42857142857143) internal successors, (675), 7 states have internal predecessors, (675), 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) [2022-12-13 15:02:04,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 222.0) internal successors, (1776), 8 states have internal predecessors, (1776), 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) [2022-12-13 15:02:04,758 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 222.0) internal successors, (1776), 8 states have internal predecessors, (1776), 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) [2022-12-13 15:02:04,759 INFO L175 Difference]: Start difference. First operand has 73 places, 60 transitions, 491 flow. Second operand 7 states and 675 transitions. [2022-12-13 15:02:04,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 71 transitions, 711 flow [2022-12-13 15:02:04,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 71 transitions, 629 flow, removed 25 selfloop flow, removed 5 redundant places. [2022-12-13 15:02:04,762 INFO L231 Difference]: Finished difference. Result has 75 places, 61 transitions, 503 flow [2022-12-13 15:02:04,762 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=503, PETRI_PLACES=75, PETRI_TRANSITIONS=61} [2022-12-13 15:02:04,762 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 54 predicate places. [2022-12-13 15:02:04,762 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 61 transitions, 503 flow [2022-12-13 15:02:04,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 94.06666666666666) internal successors, (1411), 15 states have internal predecessors, (1411), 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) [2022-12-13 15:02:04,763 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:02:04,763 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:04,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 15:02:04,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 15:02:04,965 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:02:04,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:04,966 INFO L85 PathProgramCache]: Analyzing trace with hash 945936139, now seen corresponding path program 11 times [2022-12-13 15:02:04,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:04,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831375276] [2022-12-13 15:02:04,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:04,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:05,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:05,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:05,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:02:05,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831375276] [2022-12-13 15:02:05,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831375276] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:02:05,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907904529] [2022-12-13 15:02:05,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:02:05,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:05,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:02:05,635 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:02:05,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 15:02:05,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:02:05,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:02:05,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 80 conjunts are in the unsatisfiable core [2022-12-13 15:02:05,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:02:05,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:02:05,865 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 22 treesize of output 22 [2022-12-13 15:02:05,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:02:05,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:02:06,064 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_454 (Array Int Int))) (<= c_~counter~0 (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_454) c_~A~0.base))) (+ (select .cse0 .cse1) (select .cse0 c_~A~0.offset))))) (forall ((v_ArrVal_454 (Array Int Int))) (< (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_454) c_~A~0.base))) (+ (select .cse2 .cse1) (select .cse2 c_~A~0.offset))) (+ c_~counter~0 1))))) is different from false [2022-12-13 15:02:06,072 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (.cse1 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_454 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_454) c_~A~0.base))) (+ (select .cse0 .cse1) (select .cse0 c_~A~0.offset))) (+ .cse2 c_~counter~0 1))) (forall ((v_ArrVal_454 (Array Int Int))) (<= (+ .cse2 c_~counter~0) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_454) c_~A~0.base))) (+ (select .cse3 .cse1) (select .cse3 c_~A~0.offset))))))) is different from false [2022-12-13 15:02:06,088 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:02:06,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 76 [2022-12-13 15:02:06,094 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:02:06,094 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 19 treesize of output 13 [2022-12-13 15:02:06,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:02:06,142 INFO L321 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2022-12-13 15:02:06,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 17 [2022-12-13 15:02:06,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2022-12-13 15:02:06,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907904529] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:02:06,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:02:06,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 28 [2022-12-13 15:02:06,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158091387] [2022-12-13 15:02:06,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:02:06,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 15:02:06,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:06,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 15:02:06,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=660, Unknown=2, NotChecked=106, Total=870 [2022-12-13 15:02:06,229 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 222 [2022-12-13 15:02:06,230 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 61 transitions, 503 flow. Second operand has 30 states, 30 states have (on average 65.63333333333334) internal successors, (1969), 30 states have internal predecessors, (1969), 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) [2022-12-13 15:02:06,230 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:02:06,230 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 222 [2022-12-13 15:02:06,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:02:06,891 INFO L130 PetriNetUnfolder]: 179/316 cut-off events. [2022-12-13 15:02:06,891 INFO L131 PetriNetUnfolder]: For 1748/1748 co-relation queries the response was YES. [2022-12-13 15:02:06,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1747 conditions, 316 events. 179/316 cut-off events. For 1748/1748 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1057 event pairs, 11 based on Foata normal form. 1/316 useless extension candidates. Maximal degree in co-relation 1698. Up to 187 conditions per place. [2022-12-13 15:02:06,893 INFO L137 encePairwiseOnDemand]: 215/222 looper letters, 66 selfloop transitions, 37 changer transitions 1/104 dead transitions. [2022-12-13 15:02:06,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 104 transitions, 951 flow [2022-12-13 15:02:06,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 15:02:06,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 15:02:06,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1106 transitions. [2022-12-13 15:02:06,895 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3113738738738739 [2022-12-13 15:02:06,895 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1106 transitions. [2022-12-13 15:02:06,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1106 transitions. [2022-12-13 15:02:06,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:02:06,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1106 transitions. [2022-12-13 15:02:06,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 69.125) internal successors, (1106), 16 states have internal predecessors, (1106), 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) [2022-12-13 15:02:06,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 222.0) internal successors, (3774), 17 states have internal predecessors, (3774), 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) [2022-12-13 15:02:06,899 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 222.0) internal successors, (3774), 17 states have internal predecessors, (3774), 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) [2022-12-13 15:02:06,899 INFO L175 Difference]: Start difference. First operand has 75 places, 61 transitions, 503 flow. Second operand 16 states and 1106 transitions. [2022-12-13 15:02:06,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 104 transitions, 951 flow [2022-12-13 15:02:06,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 104 transitions, 895 flow, removed 12 selfloop flow, removed 5 redundant places. [2022-12-13 15:02:06,903 INFO L231 Difference]: Finished difference. Result has 88 places, 70 transitions, 682 flow [2022-12-13 15:02:06,903 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=682, PETRI_PLACES=88, PETRI_TRANSITIONS=70} [2022-12-13 15:02:06,904 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 67 predicate places. [2022-12-13 15:02:06,904 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 70 transitions, 682 flow [2022-12-13 15:02:06,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 65.63333333333334) internal successors, (1969), 30 states have internal predecessors, (1969), 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) [2022-12-13 15:02:06,904 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:02:06,904 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:06,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 15:02:07,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 15:02:07,105 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:02:07,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:07,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1039487397, now seen corresponding path program 12 times [2022-12-13 15:02:07,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:07,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095496508] [2022-12-13 15:02:07,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:07,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:07,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:07,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:07,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:02:07,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095496508] [2022-12-13 15:02:07,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095496508] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:02:07,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145852635] [2022-12-13 15:02:07,593 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:02:07,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:07,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:02:07,594 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:02:07,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 15:02:07,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 15:02:07,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:02:07,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2022-12-13 15:02:07,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:02:07,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:02:07,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:02:07,916 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:02:07,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2022-12-13 15:02:07,953 INFO L321 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2022-12-13 15:02:07,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 17 [2022-12-13 15:02:07,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:02:07,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145852635] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:02:07,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:02:07,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 23 [2022-12-13 15:02:07,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750794827] [2022-12-13 15:02:07,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:02:07,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 15:02:07,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:07,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 15:02:07,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-12-13 15:02:08,772 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 222 [2022-12-13 15:02:08,773 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 70 transitions, 682 flow. Second operand has 25 states, 25 states have (on average 82.92) internal successors, (2073), 25 states have internal predecessors, (2073), 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) [2022-12-13 15:02:08,773 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:02:08,773 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 222 [2022-12-13 15:02:08,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:02:09,627 INFO L130 PetriNetUnfolder]: 275/489 cut-off events. [2022-12-13 15:02:09,628 INFO L131 PetriNetUnfolder]: For 2996/2996 co-relation queries the response was YES. [2022-12-13 15:02:09,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2857 conditions, 489 events. 275/489 cut-off events. For 2996/2996 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1826 event pairs, 30 based on Foata normal form. 2/490 useless extension candidates. Maximal degree in co-relation 2805. Up to 318 conditions per place. [2022-12-13 15:02:09,632 INFO L137 encePairwiseOnDemand]: 214/222 looper letters, 96 selfloop transitions, 44 changer transitions 2/142 dead transitions. [2022-12-13 15:02:09,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 142 transitions, 1445 flow [2022-12-13 15:02:09,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 15:02:09,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 15:02:09,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1811 transitions. [2022-12-13 15:02:09,634 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38845988845988844 [2022-12-13 15:02:09,634 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1811 transitions. [2022-12-13 15:02:09,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1811 transitions. [2022-12-13 15:02:09,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:02:09,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1811 transitions. [2022-12-13 15:02:09,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 86.23809523809524) internal successors, (1811), 21 states have internal predecessors, (1811), 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) [2022-12-13 15:02:09,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 222.0) internal successors, (4884), 22 states have internal predecessors, (4884), 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) [2022-12-13 15:02:09,640 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 222.0) internal successors, (4884), 22 states have internal predecessors, (4884), 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) [2022-12-13 15:02:09,640 INFO L175 Difference]: Start difference. First operand has 88 places, 70 transitions, 682 flow. Second operand 21 states and 1811 transitions. [2022-12-13 15:02:09,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 142 transitions, 1445 flow [2022-12-13 15:02:09,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 142 transitions, 1294 flow, removed 48 selfloop flow, removed 11 redundant places. [2022-12-13 15:02:09,646 INFO L231 Difference]: Finished difference. Result has 105 places, 91 transitions, 985 flow [2022-12-13 15:02:09,646 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=985, PETRI_PLACES=105, PETRI_TRANSITIONS=91} [2022-12-13 15:02:09,646 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 84 predicate places. [2022-12-13 15:02:09,646 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 91 transitions, 985 flow [2022-12-13 15:02:09,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 82.92) internal successors, (2073), 25 states have internal predecessors, (2073), 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) [2022-12-13 15:02:09,646 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:02:09,646 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:09,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 15:02:09,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 15:02:09,847 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:02:09,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:09,848 INFO L85 PathProgramCache]: Analyzing trace with hash -824056421, now seen corresponding path program 13 times [2022-12-13 15:02:09,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:09,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049245795] [2022-12-13 15:02:09,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:09,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:09,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:10,499 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:10,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:02:10,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049245795] [2022-12-13 15:02:10,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049245795] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:02:10,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910265633] [2022-12-13 15:02:10,499 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:02:10,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:10,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:02:10,500 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:02:10,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 15:02:10,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:10,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2022-12-13 15:02:10,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:02:10,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:02:10,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:02:10,881 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:02:10,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2022-12-13 15:02:10,914 INFO L321 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2022-12-13 15:02:10,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 17 [2022-12-13 15:02:10,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:02:10,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910265633] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:02:10,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:02:10,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 6] total 25 [2022-12-13 15:02:10,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753144616] [2022-12-13 15:02:10,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:02:10,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 15:02:10,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:10,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 15:02:10,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-12-13 15:02:12,163 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 222 [2022-12-13 15:02:12,164 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 91 transitions, 985 flow. Second operand has 27 states, 27 states have (on average 78.96296296296296) internal successors, (2132), 27 states have internal predecessors, (2132), 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) [2022-12-13 15:02:12,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:02:12,164 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 222 [2022-12-13 15:02:12,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:02:13,192 INFO L130 PetriNetUnfolder]: 346/615 cut-off events. [2022-12-13 15:02:13,192 INFO L131 PetriNetUnfolder]: For 4573/4573 co-relation queries the response was YES. [2022-12-13 15:02:13,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3695 conditions, 615 events. 346/615 cut-off events. For 4573/4573 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2492 event pairs, 45 based on Foata normal form. 3/617 useless extension candidates. Maximal degree in co-relation 3635. Up to 416 conditions per place. [2022-12-13 15:02:13,196 INFO L137 encePairwiseOnDemand]: 212/222 looper letters, 86 selfloop transitions, 54 changer transitions 2/142 dead transitions. [2022-12-13 15:02:13,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 142 transitions, 1642 flow [2022-12-13 15:02:13,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 15:02:13,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 15:02:13,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1475 transitions. [2022-12-13 15:02:13,198 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3691191191191191 [2022-12-13 15:02:13,198 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1475 transitions. [2022-12-13 15:02:13,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1475 transitions. [2022-12-13 15:02:13,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:02:13,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1475 transitions. [2022-12-13 15:02:13,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 81.94444444444444) internal successors, (1475), 18 states have internal predecessors, (1475), 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) [2022-12-13 15:02:13,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 222.0) internal successors, (4218), 19 states have internal predecessors, (4218), 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) [2022-12-13 15:02:13,202 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 222.0) internal successors, (4218), 19 states have internal predecessors, (4218), 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) [2022-12-13 15:02:13,202 INFO L175 Difference]: Start difference. First operand has 105 places, 91 transitions, 985 flow. Second operand 18 states and 1475 transitions. [2022-12-13 15:02:13,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 142 transitions, 1642 flow [2022-12-13 15:02:13,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 142 transitions, 1427 flow, removed 84 selfloop flow, removed 12 redundant places. [2022-12-13 15:02:13,211 INFO L231 Difference]: Finished difference. Result has 115 places, 105 transitions, 1172 flow [2022-12-13 15:02:13,211 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=770, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1172, PETRI_PLACES=115, PETRI_TRANSITIONS=105} [2022-12-13 15:02:13,211 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 94 predicate places. [2022-12-13 15:02:13,212 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 105 transitions, 1172 flow [2022-12-13 15:02:13,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 78.96296296296296) internal successors, (2132), 27 states have internal predecessors, (2132), 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) [2022-12-13 15:02:13,212 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:02:13,212 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:13,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 15:02:13,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 15:02:13,413 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:02:13,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:13,414 INFO L85 PathProgramCache]: Analyzing trace with hash 780873043, now seen corresponding path program 14 times [2022-12-13 15:02:13,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:13,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386864031] [2022-12-13 15:02:13,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:13,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:13,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:13,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:13,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:02:13,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386864031] [2022-12-13 15:02:13,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386864031] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:02:13,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095047605] [2022-12-13 15:02:13,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:02:13,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:13,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:02:13,934 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:02:13,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 15:02:14,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:02:14,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:02:14,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2022-12-13 15:02:14,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:02:14,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:02:14,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:02:14,244 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:02:14,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 61 [2022-12-13 15:02:14,297 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-12-13 15:02:14,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2022-12-13 15:02:14,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:02:14,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095047605] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:02:14,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:02:14,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 20 [2022-12-13 15:02:14,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52253732] [2022-12-13 15:02:14,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:02:14,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 15:02:14,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:14,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 15:02:14,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-12-13 15:02:14,797 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 222 [2022-12-13 15:02:14,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 105 transitions, 1172 flow. Second operand has 22 states, 22 states have (on average 86.04545454545455) internal successors, (1893), 22 states have internal predecessors, (1893), 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) [2022-12-13 15:02:14,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:02:14,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 222 [2022-12-13 15:02:14,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:02:15,298 INFO L130 PetriNetUnfolder]: 438/779 cut-off events. [2022-12-13 15:02:15,298 INFO L131 PetriNetUnfolder]: For 5804/5804 co-relation queries the response was YES. [2022-12-13 15:02:15,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4706 conditions, 779 events. 438/779 cut-off events. For 5804/5804 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3371 event pairs, 82 based on Foata normal form. 2/781 useless extension candidates. Maximal degree in co-relation 4488. Up to 625 conditions per place. [2022-12-13 15:02:15,303 INFO L137 encePairwiseOnDemand]: 214/222 looper letters, 132 selfloop transitions, 41 changer transitions 2/175 dead transitions. [2022-12-13 15:02:15,303 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 175 transitions, 2144 flow [2022-12-13 15:02:15,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 15:02:15,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 15:02:15,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1781 transitions. [2022-12-13 15:02:15,305 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40112612612612614 [2022-12-13 15:02:15,305 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1781 transitions. [2022-12-13 15:02:15,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1781 transitions. [2022-12-13 15:02:15,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:02:15,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1781 transitions. [2022-12-13 15:02:15,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 89.05) internal successors, (1781), 20 states have internal predecessors, (1781), 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) [2022-12-13 15:02:15,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 222.0) internal successors, (4662), 21 states have internal predecessors, (4662), 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) [2022-12-13 15:02:15,309 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 222.0) internal successors, (4662), 21 states have internal predecessors, (4662), 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) [2022-12-13 15:02:15,309 INFO L175 Difference]: Start difference. First operand has 115 places, 105 transitions, 1172 flow. Second operand 20 states and 1781 transitions. [2022-12-13 15:02:15,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 175 transitions, 2144 flow [2022-12-13 15:02:15,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 175 transitions, 1919 flow, removed 85 selfloop flow, removed 8 redundant places. [2022-12-13 15:02:15,322 INFO L231 Difference]: Finished difference. Result has 130 places, 130 transitions, 1499 flow [2022-12-13 15:02:15,322 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=987, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1499, PETRI_PLACES=130, PETRI_TRANSITIONS=130} [2022-12-13 15:02:15,322 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 109 predicate places. [2022-12-13 15:02:15,322 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 130 transitions, 1499 flow [2022-12-13 15:02:15,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 86.04545454545455) internal successors, (1893), 22 states have internal predecessors, (1893), 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) [2022-12-13 15:02:15,323 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:02:15,323 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:15,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 15:02:15,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:15,524 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:02:15,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:15,524 INFO L85 PathProgramCache]: Analyzing trace with hash 90508051, now seen corresponding path program 15 times [2022-12-13 15:02:15,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:15,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901964479] [2022-12-13 15:02:15,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:15,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:15,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:02:15,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:02:15,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901964479] [2022-12-13 15:02:15,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901964479] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:02:15,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929277008] [2022-12-13 15:02:15,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:02:15,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:15,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:02:15,859 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:02:15,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 15:02:15,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 15:02:15,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:02:15,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2022-12-13 15:02:15,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:02:16,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:02:16,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:02:16,165 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:02:16,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 61 [2022-12-13 15:02:16,219 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-12-13 15:02:16,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2022-12-13 15:02:16,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:02:16,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929277008] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:02:16,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:02:16,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 6] total 14 [2022-12-13 15:02:16,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913909544] [2022-12-13 15:02:16,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:02:16,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 15:02:16,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:16,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 15:02:16,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-12-13 15:02:16,586 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 222 [2022-12-13 15:02:16,587 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 130 transitions, 1499 flow. Second operand has 16 states, 16 states have (on average 92.1875) internal successors, (1475), 16 states have internal predecessors, (1475), 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) [2022-12-13 15:02:16,587 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:02:16,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 222 [2022-12-13 15:02:16,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:02:17,050 INFO L130 PetriNetUnfolder]: 486/867 cut-off events. [2022-12-13 15:02:17,050 INFO L131 PetriNetUnfolder]: For 6096/6096 co-relation queries the response was YES. [2022-12-13 15:02:17,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5089 conditions, 867 events. 486/867 cut-off events. For 6096/6096 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3884 event pairs, 98 based on Foata normal form. 2/869 useless extension candidates. Maximal degree in co-relation 4849. Up to 694 conditions per place. [2022-12-13 15:02:17,055 INFO L137 encePairwiseOnDemand]: 215/222 looper letters, 134 selfloop transitions, 40 changer transitions 3/177 dead transitions. [2022-12-13 15:02:17,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 177 transitions, 2183 flow [2022-12-13 15:02:17,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:02:17,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 15:02:17,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1344 transitions. [2022-12-13 15:02:17,057 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43243243243243246 [2022-12-13 15:02:17,057 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1344 transitions. [2022-12-13 15:02:17,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1344 transitions. [2022-12-13 15:02:17,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:02:17,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1344 transitions. [2022-12-13 15:02:17,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 96.0) internal successors, (1344), 14 states have internal predecessors, (1344), 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) [2022-12-13 15:02:17,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 222.0) internal successors, (3330), 15 states have internal predecessors, (3330), 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) [2022-12-13 15:02:17,060 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 222.0) internal successors, (3330), 15 states have internal predecessors, (3330), 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) [2022-12-13 15:02:17,060 INFO L175 Difference]: Start difference. First operand has 130 places, 130 transitions, 1499 flow. Second operand 14 states and 1344 transitions. [2022-12-13 15:02:17,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 177 transitions, 2183 flow [2022-12-13 15:02:17,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 177 transitions, 1942 flow, removed 106 selfloop flow, removed 6 redundant places. [2022-12-13 15:02:17,072 INFO L231 Difference]: Finished difference. Result has 140 places, 137 transitions, 1527 flow [2022-12-13 15:02:17,073 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=1258, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1527, PETRI_PLACES=140, PETRI_TRANSITIONS=137} [2022-12-13 15:02:17,073 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 119 predicate places. [2022-12-13 15:02:17,073 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 137 transitions, 1527 flow [2022-12-13 15:02:17,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 92.1875) internal successors, (1475), 16 states have internal predecessors, (1475), 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) [2022-12-13 15:02:17,073 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:02:17,073 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:17,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-13 15:02:17,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:17,275 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:02:17,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:17,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1968483439, now seen corresponding path program 16 times [2022-12-13 15:02:17,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:17,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556785682] [2022-12-13 15:02:17,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:17,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:17,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:17,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:17,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:02:17,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556785682] [2022-12-13 15:02:17,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556785682] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:02:17,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634165226] [2022-12-13 15:02:17,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:02:17,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:17,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:02:17,825 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:02:17,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 15:02:17,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:02:17,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:02:17,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2022-12-13 15:02:17,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:02:18,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:02:18,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:02:18,185 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:02:18,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 61 [2022-12-13 15:02:18,228 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-12-13 15:02:18,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2022-12-13 15:02:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:02:18,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634165226] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:02:18,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:02:18,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 23 [2022-12-13 15:02:18,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69543970] [2022-12-13 15:02:18,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:02:18,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 15:02:18,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:18,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 15:02:18,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-12-13 15:02:19,267 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 222 [2022-12-13 15:02:19,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 137 transitions, 1527 flow. Second operand has 25 states, 25 states have (on average 81.0) internal successors, (2025), 25 states have internal predecessors, (2025), 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) [2022-12-13 15:02:19,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:02:19,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 222 [2022-12-13 15:02:19,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:02:19,933 INFO L130 PetriNetUnfolder]: 558/998 cut-off events. [2022-12-13 15:02:19,933 INFO L131 PetriNetUnfolder]: For 7011/7011 co-relation queries the response was YES. [2022-12-13 15:02:19,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5743 conditions, 998 events. 558/998 cut-off events. For 7011/7011 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4656 event pairs, 130 based on Foata normal form. 2/1000 useless extension candidates. Maximal degree in co-relation 5486. Up to 825 conditions per place. [2022-12-13 15:02:19,938 INFO L137 encePairwiseOnDemand]: 214/222 looper letters, 150 selfloop transitions, 43 changer transitions 3/196 dead transitions. [2022-12-13 15:02:19,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 196 transitions, 2347 flow [2022-12-13 15:02:19,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 15:02:19,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 15:02:19,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1604 transitions. [2022-12-13 15:02:19,940 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38027501185395923 [2022-12-13 15:02:19,940 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1604 transitions. [2022-12-13 15:02:19,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1604 transitions. [2022-12-13 15:02:19,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:02:19,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1604 transitions. [2022-12-13 15:02:19,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 84.42105263157895) internal successors, (1604), 19 states have internal predecessors, (1604), 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) [2022-12-13 15:02:19,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 222.0) internal successors, (4440), 20 states have internal predecessors, (4440), 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) [2022-12-13 15:02:19,944 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 222.0) internal successors, (4440), 20 states have internal predecessors, (4440), 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) [2022-12-13 15:02:19,944 INFO L175 Difference]: Start difference. First operand has 140 places, 137 transitions, 1527 flow. Second operand 19 states and 1604 transitions. [2022-12-13 15:02:19,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 196 transitions, 2347 flow [2022-12-13 15:02:19,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 196 transitions, 2190 flow, removed 51 selfloop flow, removed 11 redundant places. [2022-12-13 15:02:19,960 INFO L231 Difference]: Finished difference. Result has 151 places, 147 transitions, 1711 flow [2022-12-13 15:02:19,960 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=1370, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1711, PETRI_PLACES=151, PETRI_TRANSITIONS=147} [2022-12-13 15:02:19,960 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 130 predicate places. [2022-12-13 15:02:19,960 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 147 transitions, 1711 flow [2022-12-13 15:02:19,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 81.0) internal successors, (2025), 25 states have internal predecessors, (2025), 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) [2022-12-13 15:02:19,961 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:02:19,961 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:19,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 15:02:20,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:20,161 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:02:20,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:20,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1521096321, now seen corresponding path program 17 times [2022-12-13 15:02:20,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:20,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152033577] [2022-12-13 15:02:20,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:20,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:20,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:20,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:20,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:02:20,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152033577] [2022-12-13 15:02:20,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152033577] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:02:20,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155453681] [2022-12-13 15:02:20,741 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:02:20,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:20,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:02:20,742 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:02:20,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 15:02:20,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 15:02:20,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:02:20,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 84 conjunts are in the unsatisfiable core [2022-12-13 15:02:20,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:02:20,883 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 [2022-12-13 15:02:20,910 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 6 treesize of output 5 [2022-12-13 15:02:20,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:02:20,964 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 14 treesize of output 16 [2022-12-13 15:02:21,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:21,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:02:21,378 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset))) (and (forall ((v_ArrVal_662 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_662) c_~A~0.base) c_~A~0.offset) (+ .cse0 c_~counter~0 1))) (forall ((v_ArrVal_662 (Array Int Int))) (<= (+ .cse0 c_~counter~0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_662) c_~A~0.base) c_~A~0.offset))))) is different from false [2022-12-13 15:02:21,389 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_661 (Array Int Int)) (v_ArrVal_662 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_661))) (<= (+ c_~counter~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_662) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (forall ((v_ArrVal_661 (Array Int Int)) (v_ArrVal_662 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_661))) (< (select (select (store .cse1 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_662) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) (+ c_~counter~0 (select (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 1))))) is different from false [2022-12-13 15:02:21,396 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:02:21,396 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 47 treesize of output 36 [2022-12-13 15:02:21,398 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 306 treesize of output 274 [2022-12-13 15:02:21,402 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 274 treesize of output 258 [2022-12-13 15:02:21,406 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 258 treesize of output 242 [2022-12-13 15:02:21,544 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:02:21,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 35 [2022-12-13 15:02:21,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:02:21,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 58 treesize of output 50 [2022-12-13 15:02:21,551 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 50 treesize of output 46 [2022-12-13 15:02:21,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-12-13 15:02:21,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155453681] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:02:21,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:02:21,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 31 [2022-12-13 15:02:21,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931228858] [2022-12-13 15:02:21,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:02:21,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 15:02:21,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:21,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 15:02:21,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=806, Unknown=27, NotChecked=118, Total=1056 [2022-12-13 15:02:21,758 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 222 [2022-12-13 15:02:21,760 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 147 transitions, 1711 flow. Second operand has 33 states, 33 states have (on average 62.515151515151516) internal successors, (2063), 33 states have internal predecessors, (2063), 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) [2022-12-13 15:02:21,760 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:02:21,760 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 222 [2022-12-13 15:02:21,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:02:23,028 INFO L130 PetriNetUnfolder]: 628/1125 cut-off events. [2022-12-13 15:02:23,028 INFO L131 PetriNetUnfolder]: For 8716/8716 co-relation queries the response was YES. [2022-12-13 15:02:23,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6626 conditions, 1125 events. 628/1125 cut-off events. For 8716/8716 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5454 event pairs, 122 based on Foata normal form. 1/1126 useless extension candidates. Maximal degree in co-relation 6353. Up to 808 conditions per place. [2022-12-13 15:02:23,034 INFO L137 encePairwiseOnDemand]: 214/222 looper letters, 129 selfloop transitions, 75 changer transitions 1/205 dead transitions. [2022-12-13 15:02:23,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 205 transitions, 2632 flow [2022-12-13 15:02:23,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 15:02:23,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 15:02:23,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1319 transitions. [2022-12-13 15:02:23,043 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2970720720720721 [2022-12-13 15:02:23,043 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1319 transitions. [2022-12-13 15:02:23,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1319 transitions. [2022-12-13 15:02:23,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:02:23,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1319 transitions. [2022-12-13 15:02:23,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 65.95) internal successors, (1319), 20 states have internal predecessors, (1319), 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) [2022-12-13 15:02:23,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 222.0) internal successors, (4662), 21 states have internal predecessors, (4662), 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) [2022-12-13 15:02:23,046 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 222.0) internal successors, (4662), 21 states have internal predecessors, (4662), 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) [2022-12-13 15:02:23,046 INFO L175 Difference]: Start difference. First operand has 151 places, 147 transitions, 1711 flow. Second operand 20 states and 1319 transitions. [2022-12-13 15:02:23,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 205 transitions, 2632 flow [2022-12-13 15:02:23,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 205 transitions, 2453 flow, removed 66 selfloop flow, removed 12 redundant places. [2022-12-13 15:02:23,065 INFO L231 Difference]: Finished difference. Result has 163 places, 162 transitions, 2054 flow [2022-12-13 15:02:23,065 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=1536, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2054, PETRI_PLACES=163, PETRI_TRANSITIONS=162} [2022-12-13 15:02:23,065 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 142 predicate places. [2022-12-13 15:02:23,065 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 162 transitions, 2054 flow [2022-12-13 15:02:23,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 62.515151515151516) internal successors, (2063), 33 states have internal predecessors, (2063), 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) [2022-12-13 15:02:23,066 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:02:23,066 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:23,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 15:02:23,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:23,267 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:02:23,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:23,268 INFO L85 PathProgramCache]: Analyzing trace with hash 558805787, now seen corresponding path program 18 times [2022-12-13 15:02:23,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:23,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876907584] [2022-12-13 15:02:23,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:23,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:23,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:23,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:23,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:02:23,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876907584] [2022-12-13 15:02:23,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876907584] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:02:23,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467355591] [2022-12-13 15:02:23,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:02:23,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:23,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:02:23,659 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:02:23,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 15:02:23,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 15:02:23,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:02:23,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2022-12-13 15:02:23,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:02:23,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:02:23,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:02:23,936 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:02:23,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 51 [2022-12-13 15:02:23,969 INFO L321 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2022-12-13 15:02:23,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 18 [2022-12-13 15:02:23,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:02:23,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467355591] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:02:23,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:02:23,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 19 [2022-12-13 15:02:23,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210013296] [2022-12-13 15:02:23,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:02:23,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 15:02:23,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:23,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 15:02:23,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-12-13 15:02:24,540 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 222 [2022-12-13 15:02:24,541 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 162 transitions, 2054 flow. Second operand has 21 states, 21 states have (on average 87.0952380952381) internal successors, (1829), 21 states have internal predecessors, (1829), 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) [2022-12-13 15:02:24,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:02:24,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 222 [2022-12-13 15:02:24,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:02:25,035 INFO L130 PetriNetUnfolder]: 668/1194 cut-off events. [2022-12-13 15:02:25,035 INFO L131 PetriNetUnfolder]: For 9634/9634 co-relation queries the response was YES. [2022-12-13 15:02:25,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7187 conditions, 1194 events. 668/1194 cut-off events. For 9634/9634 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5877 event pairs, 176 based on Foata normal form. 1/1195 useless extension candidates. Maximal degree in co-relation 6908. Up to 1064 conditions per place. [2022-12-13 15:02:25,042 INFO L137 encePairwiseOnDemand]: 214/222 looper letters, 151 selfloop transitions, 44 changer transitions 1/196 dead transitions. [2022-12-13 15:02:25,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 196 transitions, 2757 flow [2022-12-13 15:02:25,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 15:02:25,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 15:02:25,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1346 transitions. [2022-12-13 15:02:25,044 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4042042042042042 [2022-12-13 15:02:25,044 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1346 transitions. [2022-12-13 15:02:25,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1346 transitions. [2022-12-13 15:02:25,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:02:25,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1346 transitions. [2022-12-13 15:02:25,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 89.73333333333333) internal successors, (1346), 15 states have internal predecessors, (1346), 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) [2022-12-13 15:02:25,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 222.0) internal successors, (3552), 16 states have internal predecessors, (3552), 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) [2022-12-13 15:02:25,047 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 222.0) internal successors, (3552), 16 states have internal predecessors, (3552), 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) [2022-12-13 15:02:25,047 INFO L175 Difference]: Start difference. First operand has 163 places, 162 transitions, 2054 flow. Second operand 15 states and 1346 transitions. [2022-12-13 15:02:25,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 196 transitions, 2757 flow [2022-12-13 15:02:25,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 196 transitions, 2499 flow, removed 91 selfloop flow, removed 13 redundant places. [2022-12-13 15:02:25,077 INFO L231 Difference]: Finished difference. Result has 167 places, 172 transitions, 2134 flow [2022-12-13 15:02:25,077 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=1800, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2134, PETRI_PLACES=167, PETRI_TRANSITIONS=172} [2022-12-13 15:02:25,077 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 146 predicate places. [2022-12-13 15:02:25,077 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 172 transitions, 2134 flow [2022-12-13 15:02:25,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 87.0952380952381) internal successors, (1829), 21 states have internal predecessors, (1829), 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) [2022-12-13 15:02:25,078 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:02:25,078 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:25,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-13 15:02:25,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:25,279 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:02:25,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:25,280 INFO L85 PathProgramCache]: Analyzing trace with hash 2135611657, now seen corresponding path program 19 times [2022-12-13 15:02:25,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:25,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788289956] [2022-12-13 15:02:25,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:25,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:25,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:25,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:02:25,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788289956] [2022-12-13 15:02:25,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788289956] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:02:25,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858123094] [2022-12-13 15:02:25,775 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:02:25,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:25,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:02:25,776 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:02:25,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 15:02:25,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:25,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2022-12-13 15:02:25,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:02:26,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:02:26,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:02:26,178 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:02:26,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 51 [2022-12-13 15:02:26,212 INFO L321 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2022-12-13 15:02:26,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 18 [2022-12-13 15:02:26,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:02:26,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858123094] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:02:26,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:02:26,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 23 [2022-12-13 15:02:26,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818234062] [2022-12-13 15:02:26,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:02:26,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 15:02:26,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:26,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 15:02:26,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-12-13 15:02:27,568 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 222 [2022-12-13 15:02:27,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 172 transitions, 2134 flow. Second operand has 25 states, 25 states have (on average 80.92) internal successors, (2023), 25 states have internal predecessors, (2023), 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) [2022-12-13 15:02:27,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:02:27,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 222 [2022-12-13 15:02:27,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:02:28,497 INFO L130 PetriNetUnfolder]: 695/1255 cut-off events. [2022-12-13 15:02:28,498 INFO L131 PetriNetUnfolder]: For 9657/9657 co-relation queries the response was YES. [2022-12-13 15:02:28,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7404 conditions, 1255 events. 695/1255 cut-off events. For 9657/9657 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6378 event pairs, 200 based on Foata normal form. 2/1257 useless extension candidates. Maximal degree in co-relation 7119. Up to 1131 conditions per place. [2022-12-13 15:02:28,504 INFO L137 encePairwiseOnDemand]: 213/222 looper letters, 167 selfloop transitions, 44 changer transitions 5/216 dead transitions. [2022-12-13 15:02:28,504 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 216 transitions, 2968 flow [2022-12-13 15:02:28,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 15:02:28,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 15:02:28,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1506 transitions. [2022-12-13 15:02:28,513 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3768768768768769 [2022-12-13 15:02:28,513 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1506 transitions. [2022-12-13 15:02:28,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1506 transitions. [2022-12-13 15:02:28,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:02:28,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1506 transitions. [2022-12-13 15:02:28,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 83.66666666666667) internal successors, (1506), 18 states have internal predecessors, (1506), 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) [2022-12-13 15:02:28,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 222.0) internal successors, (4218), 19 states have internal predecessors, (4218), 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) [2022-12-13 15:02:28,516 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 222.0) internal successors, (4218), 19 states have internal predecessors, (4218), 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) [2022-12-13 15:02:28,516 INFO L175 Difference]: Start difference. First operand has 167 places, 172 transitions, 2134 flow. Second operand 18 states and 1506 transitions. [2022-12-13 15:02:28,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 216 transitions, 2968 flow [2022-12-13 15:02:28,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 216 transitions, 2748 flow, removed 94 selfloop flow, removed 7 redundant places. [2022-12-13 15:02:28,542 INFO L231 Difference]: Finished difference. Result has 180 places, 184 transitions, 2307 flow [2022-12-13 15:02:28,542 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=1940, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2307, PETRI_PLACES=180, PETRI_TRANSITIONS=184} [2022-12-13 15:02:28,543 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 159 predicate places. [2022-12-13 15:02:28,543 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 184 transitions, 2307 flow [2022-12-13 15:02:28,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 80.92) internal successors, (2023), 25 states have internal predecessors, (2023), 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) [2022-12-13 15:02:28,543 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:02:28,543 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:28,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-13 15:02:28,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-13 15:02:28,744 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:02:28,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:28,745 INFO L85 PathProgramCache]: Analyzing trace with hash -2123987649, now seen corresponding path program 20 times [2022-12-13 15:02:28,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:28,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312444785] [2022-12-13 15:02:28,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:28,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:28,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:29,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:29,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:02:29,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312444785] [2022-12-13 15:02:29,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312444785] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:02:29,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106314260] [2022-12-13 15:02:29,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:02:29,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:29,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:02:29,208 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:02:29,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 15:02:29,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:02:29,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:02:29,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2022-12-13 15:02:29,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:02:29,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:02:29,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:02:29,567 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:02:29,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 61 [2022-12-13 15:02:29,611 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-12-13 15:02:29,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2022-12-13 15:02:29,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:02:29,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106314260] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:02:29,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:02:29,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 22 [2022-12-13 15:02:29,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107929763] [2022-12-13 15:02:29,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:02:29,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 15:02:29,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:29,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 15:02:29,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-12-13 15:02:30,298 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 222 [2022-12-13 15:02:30,300 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 184 transitions, 2307 flow. Second operand has 24 states, 24 states have (on average 82.95833333333333) internal successors, (1991), 24 states have internal predecessors, (1991), 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) [2022-12-13 15:02:30,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:02:30,300 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 222 [2022-12-13 15:02:30,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:02:30,985 INFO L130 PetriNetUnfolder]: 773/1397 cut-off events. [2022-12-13 15:02:30,985 INFO L131 PetriNetUnfolder]: For 13185/13185 co-relation queries the response was YES. [2022-12-13 15:02:30,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8744 conditions, 1397 events. 773/1397 cut-off events. For 13185/13185 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7317 event pairs, 210 based on Foata normal form. 2/1399 useless extension candidates. Maximal degree in co-relation 8387. Up to 1223 conditions per place. [2022-12-13 15:02:30,993 INFO L137 encePairwiseOnDemand]: 215/222 looper letters, 192 selfloop transitions, 41 changer transitions 2/235 dead transitions. [2022-12-13 15:02:30,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 235 transitions, 3381 flow [2022-12-13 15:02:30,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 15:02:30,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 15:02:30,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1299 transitions. [2022-12-13 15:02:30,994 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3900900900900901 [2022-12-13 15:02:30,994 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1299 transitions. [2022-12-13 15:02:30,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1299 transitions. [2022-12-13 15:02:30,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:02:30,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1299 transitions. [2022-12-13 15:02:30,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 86.6) internal successors, (1299), 15 states have internal predecessors, (1299), 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) [2022-12-13 15:02:30,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 222.0) internal successors, (3552), 16 states have internal predecessors, (3552), 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) [2022-12-13 15:02:30,997 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 222.0) internal successors, (3552), 16 states have internal predecessors, (3552), 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) [2022-12-13 15:02:30,998 INFO L175 Difference]: Start difference. First operand has 180 places, 184 transitions, 2307 flow. Second operand 15 states and 1299 transitions. [2022-12-13 15:02:30,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 235 transitions, 3381 flow [2022-12-13 15:02:31,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 235 transitions, 3134 flow, removed 100 selfloop flow, removed 10 redundant places. [2022-12-13 15:02:31,028 INFO L231 Difference]: Finished difference. Result has 188 places, 196 transitions, 2567 flow [2022-12-13 15:02:31,028 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=2062, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2567, PETRI_PLACES=188, PETRI_TRANSITIONS=196} [2022-12-13 15:02:31,028 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 167 predicate places. [2022-12-13 15:02:31,028 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 196 transitions, 2567 flow [2022-12-13 15:02:31,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 82.95833333333333) internal successors, (1991), 24 states have internal predecessors, (1991), 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) [2022-12-13 15:02:31,029 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:02:31,029 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:31,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-13 15:02:31,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 15:02:31,229 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:02:31,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:31,229 INFO L85 PathProgramCache]: Analyzing trace with hash 811104107, now seen corresponding path program 21 times [2022-12-13 15:02:31,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:31,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293980709] [2022-12-13 15:02:31,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:31,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:31,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:02:31,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293980709] [2022-12-13 15:02:31,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293980709] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:02:31,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698763570] [2022-12-13 15:02:31,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:02:31,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:31,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:02:31,846 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:02:31,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 15:02:31,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 15:02:31,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:02:31,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2022-12-13 15:02:31,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:02:32,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:02:32,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:02:32,219 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:02:32,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 61 [2022-12-13 15:02:32,263 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-12-13 15:02:32,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2022-12-13 15:02:32,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:02:32,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698763570] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:02:32,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:02:32,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 6] total 23 [2022-12-13 15:02:32,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656750158] [2022-12-13 15:02:32,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:02:32,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 15:02:32,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:32,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 15:02:32,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-12-13 15:02:33,297 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 222 [2022-12-13 15:02:33,298 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 196 transitions, 2567 flow. Second operand has 25 states, 25 states have (on average 79.0) internal successors, (1975), 25 states have internal predecessors, (1975), 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) [2022-12-13 15:02:33,298 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:02:33,298 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 222 [2022-12-13 15:02:33,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:02:34,100 INFO L130 PetriNetUnfolder]: 837/1512 cut-off events. [2022-12-13 15:02:34,101 INFO L131 PetriNetUnfolder]: For 16509/16509 co-relation queries the response was YES. [2022-12-13 15:02:34,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9710 conditions, 1512 events. 837/1512 cut-off events. For 16509/16509 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8129 event pairs, 216 based on Foata normal form. 3/1513 useless extension candidates. Maximal degree in co-relation 9349. Up to 1321 conditions per place. [2022-12-13 15:02:34,109 INFO L137 encePairwiseOnDemand]: 214/222 looper letters, 209 selfloop transitions, 43 changer transitions 3/255 dead transitions. [2022-12-13 15:02:34,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 255 transitions, 3645 flow [2022-12-13 15:02:34,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 15:02:34,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 15:02:34,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1484 transitions. [2022-12-13 15:02:34,111 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3713713713713714 [2022-12-13 15:02:34,111 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1484 transitions. [2022-12-13 15:02:34,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1484 transitions. [2022-12-13 15:02:34,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:02:34,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1484 transitions. [2022-12-13 15:02:34,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 82.44444444444444) internal successors, (1484), 18 states have internal predecessors, (1484), 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) [2022-12-13 15:02:34,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 222.0) internal successors, (4218), 19 states have internal predecessors, (4218), 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) [2022-12-13 15:02:34,115 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 222.0) internal successors, (4218), 19 states have internal predecessors, (4218), 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) [2022-12-13 15:02:34,115 INFO L175 Difference]: Start difference. First operand has 188 places, 196 transitions, 2567 flow. Second operand 18 states and 1484 transitions. [2022-12-13 15:02:34,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 255 transitions, 3645 flow [2022-12-13 15:02:34,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 255 transitions, 3319 flow, removed 145 selfloop flow, removed 7 redundant places. [2022-12-13 15:02:34,150 INFO L231 Difference]: Finished difference. Result has 202 places, 207 transitions, 2708 flow [2022-12-13 15:02:34,150 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=2241, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2708, PETRI_PLACES=202, PETRI_TRANSITIONS=207} [2022-12-13 15:02:34,150 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 181 predicate places. [2022-12-13 15:02:34,150 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 207 transitions, 2708 flow [2022-12-13 15:02:34,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 79.0) internal successors, (1975), 25 states have internal predecessors, (1975), 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) [2022-12-13 15:02:34,150 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:02:34,151 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:34,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 15:02:34,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 15:02:34,352 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:02:34,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:34,353 INFO L85 PathProgramCache]: Analyzing trace with hash 2142953115, now seen corresponding path program 22 times [2022-12-13 15:02:34,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:34,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480629803] [2022-12-13 15:02:34,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:34,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:34,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:34,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:34,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:02:34,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480629803] [2022-12-13 15:02:34,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480629803] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:02:34,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217314068] [2022-12-13 15:02:34,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:02:34,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:34,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:02:34,775 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:02:34,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 15:02:34,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:02:34,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:02:34,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2022-12-13 15:02:34,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:02:34,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:02:34,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:02:35,099 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:02:35,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 51 [2022-12-13 15:02:35,141 INFO L321 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2022-12-13 15:02:35,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 18 [2022-12-13 15:02:35,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:02:35,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217314068] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:02:35,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:02:35,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 22 [2022-12-13 15:02:35,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624727667] [2022-12-13 15:02:35,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:02:35,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 15:02:35,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:35,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 15:02:35,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-12-13 15:02:35,732 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 222 [2022-12-13 15:02:35,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 207 transitions, 2708 flow. Second operand has 24 states, 24 states have (on average 86.0) internal successors, (2064), 24 states have internal predecessors, (2064), 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) [2022-12-13 15:02:35,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:02:35,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 222 [2022-12-13 15:02:35,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:02:36,469 INFO L130 PetriNetUnfolder]: 895/1628 cut-off events. [2022-12-13 15:02:36,469 INFO L131 PetriNetUnfolder]: For 17912/17912 co-relation queries the response was YES. [2022-12-13 15:02:36,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10368 conditions, 1628 events. 895/1628 cut-off events. For 17912/17912 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 8992 event pairs, 258 based on Foata normal form. 4/1630 useless extension candidates. Maximal degree in co-relation 9979. Up to 1464 conditions per place. [2022-12-13 15:02:36,478 INFO L137 encePairwiseOnDemand]: 213/222 looper letters, 206 selfloop transitions, 47 changer transitions 10/263 dead transitions. [2022-12-13 15:02:36,478 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 263 transitions, 3817 flow [2022-12-13 15:02:36,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 15:02:36,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 15:02:36,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1783 transitions. [2022-12-13 15:02:36,480 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4015765765765766 [2022-12-13 15:02:36,480 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1783 transitions. [2022-12-13 15:02:36,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1783 transitions. [2022-12-13 15:02:36,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:02:36,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1783 transitions. [2022-12-13 15:02:36,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 89.15) internal successors, (1783), 20 states have internal predecessors, (1783), 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) [2022-12-13 15:02:36,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 222.0) internal successors, (4662), 21 states have internal predecessors, (4662), 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) [2022-12-13 15:02:36,484 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 222.0) internal successors, (4662), 21 states have internal predecessors, (4662), 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) [2022-12-13 15:02:36,484 INFO L175 Difference]: Start difference. First operand has 202 places, 207 transitions, 2708 flow. Second operand 20 states and 1783 transitions. [2022-12-13 15:02:36,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 263 transitions, 3817 flow [2022-12-13 15:02:36,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 263 transitions, 3496 flow, removed 140 selfloop flow, removed 10 redundant places. [2022-12-13 15:02:36,527 INFO L231 Difference]: Finished difference. Result has 216 places, 219 transitions, 2907 flow [2022-12-13 15:02:36,527 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=2387, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2907, PETRI_PLACES=216, PETRI_TRANSITIONS=219} [2022-12-13 15:02:36,527 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 195 predicate places. [2022-12-13 15:02:36,527 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 219 transitions, 2907 flow [2022-12-13 15:02:36,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 86.0) internal successors, (2064), 24 states have internal predecessors, (2064), 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) [2022-12-13 15:02:36,527 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:02:36,528 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:36,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-13 15:02:36,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 15:02:36,728 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:02:36,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:36,729 INFO L85 PathProgramCache]: Analyzing trace with hash -523013925, now seen corresponding path program 23 times [2022-12-13 15:02:36,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:36,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638194606] [2022-12-13 15:02:36,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:36,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:36,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:37,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:37,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:02:37,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638194606] [2022-12-13 15:02:37,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638194606] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:02:37,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238927828] [2022-12-13 15:02:37,275 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:02:37,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:37,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:02:37,275 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:02:37,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 15:02:37,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:02:37,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:02:37,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2022-12-13 15:02:37,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:02:37,480 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:02:37,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:02:37,561 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:02:37,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 61 [2022-12-13 15:02:37,590 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-12-13 15:02:37,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2022-12-13 15:02:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:02:37,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238927828] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:02:37,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:02:37,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 22 [2022-12-13 15:02:37,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909788849] [2022-12-13 15:02:37,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:02:37,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 15:02:37,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:37,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 15:02:37,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-12-13 15:02:38,701 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 222 [2022-12-13 15:02:38,702 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 219 transitions, 2907 flow. Second operand has 24 states, 24 states have (on average 80.91666666666667) internal successors, (1942), 24 states have internal predecessors, (1942), 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) [2022-12-13 15:02:38,702 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:02:38,702 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 222 [2022-12-13 15:02:38,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:02:39,631 INFO L130 PetriNetUnfolder]: 979/1784 cut-off events. [2022-12-13 15:02:39,631 INFO L131 PetriNetUnfolder]: For 23909/23909 co-relation queries the response was YES. [2022-12-13 15:02:39,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12045 conditions, 1784 events. 979/1784 cut-off events. For 23909/23909 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 10070 event pairs, 278 based on Foata normal form. 2/1784 useless extension candidates. Maximal degree in co-relation 11639. Up to 1604 conditions per place. [2022-12-13 15:02:39,641 INFO L137 encePairwiseOnDemand]: 213/222 looper letters, 230 selfloop transitions, 46 changer transitions 2/278 dead transitions. [2022-12-13 15:02:39,642 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 278 transitions, 4310 flow [2022-12-13 15:02:39,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 15:02:39,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 15:02:39,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1758 transitions. [2022-12-13 15:02:39,644 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3770913770913771 [2022-12-13 15:02:39,644 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1758 transitions. [2022-12-13 15:02:39,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1758 transitions. [2022-12-13 15:02:39,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:02:39,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1758 transitions. [2022-12-13 15:02:39,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 83.71428571428571) internal successors, (1758), 21 states have internal predecessors, (1758), 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) [2022-12-13 15:02:39,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 222.0) internal successors, (4884), 22 states have internal predecessors, (4884), 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) [2022-12-13 15:02:39,648 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 222.0) internal successors, (4884), 22 states have internal predecessors, (4884), 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) [2022-12-13 15:02:39,648 INFO L175 Difference]: Start difference. First operand has 216 places, 219 transitions, 2907 flow. Second operand 21 states and 1758 transitions. [2022-12-13 15:02:39,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 278 transitions, 4310 flow [2022-12-13 15:02:39,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 278 transitions, 3764 flow, removed 243 selfloop flow, removed 11 redundant places. [2022-12-13 15:02:39,704 INFO L231 Difference]: Finished difference. Result has 229 places, 236 transitions, 3101 flow [2022-12-13 15:02:39,704 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=2521, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3101, PETRI_PLACES=229, PETRI_TRANSITIONS=236} [2022-12-13 15:02:39,705 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 208 predicate places. [2022-12-13 15:02:39,705 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 236 transitions, 3101 flow [2022-12-13 15:02:39,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 80.91666666666667) internal successors, (1942), 24 states have internal predecessors, (1942), 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) [2022-12-13 15:02:39,705 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:02:39,705 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:39,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-13 15:02:39,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:39,905 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:02:39,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:39,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1882353975, now seen corresponding path program 24 times [2022-12-13 15:02:39,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:39,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684167521] [2022-12-13 15:02:39,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:39,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:39,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:40,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:40,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:02:40,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684167521] [2022-12-13 15:02:40,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684167521] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:02:40,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267203697] [2022-12-13 15:02:40,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:02:40,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:40,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:02:40,344 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:02:40,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 15:02:40,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 15:02:40,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:02:40,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2022-12-13 15:02:40,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:02:40,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:02:40,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:02:40,735 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:02:40,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 51 [2022-12-13 15:02:40,770 INFO L321 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2022-12-13 15:02:40,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 18 [2022-12-13 15:02:40,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:02:40,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267203697] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:02:40,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:02:40,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 22 [2022-12-13 15:02:40,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816418048] [2022-12-13 15:02:40,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:02:40,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 15:02:40,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:40,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 15:02:40,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-12-13 15:02:41,426 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 222 [2022-12-13 15:02:41,426 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 236 transitions, 3101 flow. Second operand has 24 states, 24 states have (on average 86.08333333333333) internal successors, (2066), 24 states have internal predecessors, (2066), 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) [2022-12-13 15:02:41,427 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:02:41,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 222 [2022-12-13 15:02:41,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:02:42,253 INFO L130 PetriNetUnfolder]: 1035/1886 cut-off events. [2022-12-13 15:02:42,253 INFO L131 PetriNetUnfolder]: For 25932/25932 co-relation queries the response was YES. [2022-12-13 15:02:42,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12640 conditions, 1886 events. 1035/1886 cut-off events. For 25932/25932 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 10848 event pairs, 296 based on Foata normal form. 2/1886 useless extension candidates. Maximal degree in co-relation 12223. Up to 1691 conditions per place. [2022-12-13 15:02:42,266 INFO L137 encePairwiseOnDemand]: 214/222 looper letters, 237 selfloop transitions, 50 changer transitions 3/290 dead transitions. [2022-12-13 15:02:42,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 290 transitions, 4256 flow [2022-12-13 15:02:42,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 15:02:42,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 15:02:42,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1783 transitions. [2022-12-13 15:02:42,268 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4015765765765766 [2022-12-13 15:02:42,268 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1783 transitions. [2022-12-13 15:02:42,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1783 transitions. [2022-12-13 15:02:42,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:02:42,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1783 transitions. [2022-12-13 15:02:42,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 89.15) internal successors, (1783), 20 states have internal predecessors, (1783), 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) [2022-12-13 15:02:42,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 222.0) internal successors, (4662), 21 states have internal predecessors, (4662), 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) [2022-12-13 15:02:42,272 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 222.0) internal successors, (4662), 21 states have internal predecessors, (4662), 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) [2022-12-13 15:02:42,272 INFO L175 Difference]: Start difference. First operand has 229 places, 236 transitions, 3101 flow. Second operand 20 states and 1783 transitions. [2022-12-13 15:02:42,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 290 transitions, 4256 flow [2022-12-13 15:02:42,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 290 transitions, 3870 flow, removed 162 selfloop flow, removed 13 redundant places. [2022-12-13 15:02:42,355 INFO L231 Difference]: Finished difference. Result has 238 places, 244 transitions, 3163 flow [2022-12-13 15:02:42,356 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=2715, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3163, PETRI_PLACES=238, PETRI_TRANSITIONS=244} [2022-12-13 15:02:42,356 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 217 predicate places. [2022-12-13 15:02:42,356 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 244 transitions, 3163 flow [2022-12-13 15:02:42,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 86.08333333333333) internal successors, (2066), 24 states have internal predecessors, (2066), 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) [2022-12-13 15:02:42,356 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:02:42,357 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:42,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-13 15:02:42,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 15:02:42,558 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:02:42,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:42,559 INFO L85 PathProgramCache]: Analyzing trace with hash -246012261, now seen corresponding path program 25 times [2022-12-13 15:02:42,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:42,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495440095] [2022-12-13 15:02:42,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:42,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:42,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:42,989 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:42,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:02:42,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495440095] [2022-12-13 15:02:42,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495440095] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:02:42,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003243400] [2022-12-13 15:02:42,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:02:42,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:42,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:02:42,990 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:02:42,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 15:02:43,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:43,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2022-12-13 15:02:43,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:02:43,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:02:43,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:02:43,310 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:02:43,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 61 [2022-12-13 15:02:43,344 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-12-13 15:02:43,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2022-12-13 15:02:43,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:02:43,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003243400] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:02:43,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:02:43,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 6] total 23 [2022-12-13 15:02:43,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259773614] [2022-12-13 15:02:43,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:02:43,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 15:02:43,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:43,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 15:02:43,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-12-13 15:02:44,217 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 222 [2022-12-13 15:02:44,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 244 transitions, 3163 flow. Second operand has 25 states, 25 states have (on average 86.04) internal successors, (2151), 25 states have internal predecessors, (2151), 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) [2022-12-13 15:02:44,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:02:44,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 222 [2022-12-13 15:02:44,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:02:45,310 INFO L130 PetriNetUnfolder]: 1093/1998 cut-off events. [2022-12-13 15:02:45,311 INFO L131 PetriNetUnfolder]: For 28296/28296 co-relation queries the response was YES. [2022-12-13 15:02:45,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13425 conditions, 1998 events. 1093/1998 cut-off events. For 28296/28296 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 11680 event pairs, 322 based on Foata normal form. 2/1998 useless extension candidates. Maximal degree in co-relation 13055. Up to 1806 conditions per place. [2022-12-13 15:02:45,322 INFO L137 encePairwiseOnDemand]: 213/222 looper letters, 257 selfloop transitions, 47 changer transitions 6/310 dead transitions. [2022-12-13 15:02:45,322 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 310 transitions, 4551 flow [2022-12-13 15:02:45,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 15:02:45,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 15:02:45,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1962 transitions. [2022-12-13 15:02:45,324 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40171990171990174 [2022-12-13 15:02:45,325 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1962 transitions. [2022-12-13 15:02:45,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1962 transitions. [2022-12-13 15:02:45,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:02:45,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1962 transitions. [2022-12-13 15:02:45,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 89.18181818181819) internal successors, (1962), 22 states have internal predecessors, (1962), 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) [2022-12-13 15:02:45,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 222.0) internal successors, (5106), 23 states have internal predecessors, (5106), 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) [2022-12-13 15:02:45,329 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 222.0) internal successors, (5106), 23 states have internal predecessors, (5106), 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) [2022-12-13 15:02:45,329 INFO L175 Difference]: Start difference. First operand has 238 places, 244 transitions, 3163 flow. Second operand 22 states and 1962 transitions. [2022-12-13 15:02:45,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 310 transitions, 4551 flow [2022-12-13 15:02:45,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 310 transitions, 4251 flow, removed 120 selfloop flow, removed 14 redundant places. [2022-12-13 15:02:45,410 INFO L231 Difference]: Finished difference. Result has 249 places, 255 transitions, 3429 flow [2022-12-13 15:02:45,410 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=2863, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3429, PETRI_PLACES=249, PETRI_TRANSITIONS=255} [2022-12-13 15:02:45,410 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 228 predicate places. [2022-12-13 15:02:45,410 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 255 transitions, 3429 flow [2022-12-13 15:02:45,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 86.04) internal successors, (2151), 25 states have internal predecessors, (2151), 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) [2022-12-13 15:02:45,411 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:02:45,411 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:45,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-13 15:02:45,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:45,612 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:02:45,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:45,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1251436115, now seen corresponding path program 26 times [2022-12-13 15:02:45,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:45,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216597395] [2022-12-13 15:02:45,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:45,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:45,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:46,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:46,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:02:46,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216597395] [2022-12-13 15:02:46,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216597395] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:02:46,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214797581] [2022-12-13 15:02:46,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:02:46,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:46,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:02:46,138 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:02:46,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 15:02:46,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:02:46,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:02:46,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 76 conjunts are in the unsatisfiable core [2022-12-13 15:02:46,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:02:46,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:02:46,301 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 19 treesize of output 21 [2022-12-13 15:02:46,410 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:02:46,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:02:46,614 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:02:46,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 83 [2022-12-13 15:02:46,622 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:02:46,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 36 [2022-12-13 15:02:46,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:02:46,669 INFO L321 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2022-12-13 15:02:46,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 17 [2022-12-13 15:02:46,739 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:02:46,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214797581] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:02:46,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:02:46,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 28 [2022-12-13 15:02:46,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212129458] [2022-12-13 15:02:46,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:02:46,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 15:02:46,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:46,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 15:02:46,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=748, Unknown=10, NotChecked=0, Total=870 [2022-12-13 15:02:47,884 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 222 [2022-12-13 15:02:47,885 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 255 transitions, 3429 flow. Second operand has 30 states, 30 states have (on average 65.66666666666667) internal successors, (1970), 30 states have internal predecessors, (1970), 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) [2022-12-13 15:02:47,885 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:02:47,885 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 222 [2022-12-13 15:02:47,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:02:49,121 INFO L130 PetriNetUnfolder]: 1157/2115 cut-off events. [2022-12-13 15:02:49,121 INFO L131 PetriNetUnfolder]: For 31503/31503 co-relation queries the response was YES. [2022-12-13 15:02:49,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14355 conditions, 2115 events. 1157/2115 cut-off events. For 31503/31503 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 12568 event pairs, 294 based on Foata normal form. 2/2115 useless extension candidates. Maximal degree in co-relation 13973. Up to 1842 conditions per place. [2022-12-13 15:02:49,138 INFO L137 encePairwiseOnDemand]: 214/222 looper letters, 230 selfloop transitions, 70 changer transitions 2/302 dead transitions. [2022-12-13 15:02:49,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 302 transitions, 4500 flow [2022-12-13 15:02:49,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 15:02:49,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 15:02:49,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1244 transitions. [2022-12-13 15:02:49,141 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3113113113113113 [2022-12-13 15:02:49,141 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1244 transitions. [2022-12-13 15:02:49,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1244 transitions. [2022-12-13 15:02:49,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:02:49,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1244 transitions. [2022-12-13 15:02:49,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 69.11111111111111) internal successors, (1244), 18 states have internal predecessors, (1244), 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) [2022-12-13 15:02:49,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 222.0) internal successors, (4218), 19 states have internal predecessors, (4218), 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) [2022-12-13 15:02:49,146 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 222.0) internal successors, (4218), 19 states have internal predecessors, (4218), 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) [2022-12-13 15:02:49,147 INFO L175 Difference]: Start difference. First operand has 249 places, 255 transitions, 3429 flow. Second operand 18 states and 1244 transitions. [2022-12-13 15:02:49,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 302 transitions, 4500 flow [2022-12-13 15:02:49,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 302 transitions, 4093 flow, removed 180 selfloop flow, removed 13 redundant places. [2022-12-13 15:02:49,299 INFO L231 Difference]: Finished difference. Result has 257 places, 265 transitions, 3449 flow [2022-12-13 15:02:49,299 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=3022, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3449, PETRI_PLACES=257, PETRI_TRANSITIONS=265} [2022-12-13 15:02:49,300 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 236 predicate places. [2022-12-13 15:02:49,300 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 265 transitions, 3449 flow [2022-12-13 15:02:49,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 65.66666666666667) internal successors, (1970), 30 states have internal predecessors, (1970), 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) [2022-12-13 15:02:49,301 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:02:49,301 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:49,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-12-13 15:02:49,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:49,502 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:02:49,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:49,503 INFO L85 PathProgramCache]: Analyzing trace with hash 408879819, now seen corresponding path program 27 times [2022-12-13 15:02:49,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:49,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641088929] [2022-12-13 15:02:49,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:49,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:49,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:49,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:02:49,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:02:49,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641088929] [2022-12-13 15:02:49,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641088929] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:02:49,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577785559] [2022-12-13 15:02:49,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:02:49,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:49,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:02:49,608 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:02:49,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 15:02:49,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 15:02:49,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:02:49,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 15:02:49,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:02:49,775 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:02:49,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:02:49,818 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:02:49,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577785559] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:02:49,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:02:49,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-12-13 15:02:49,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281158617] [2022-12-13 15:02:49,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:02:49,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 15:02:49,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:49,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 15:02:49,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-12-13 15:02:49,928 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 222 [2022-12-13 15:02:49,929 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 265 transitions, 3449 flow. Second operand has 19 states, 19 states have (on average 93.73684210526316) internal successors, (1781), 19 states have internal predecessors, (1781), 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) [2022-12-13 15:02:49,929 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:02:49,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 222 [2022-12-13 15:02:49,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:02:50,728 INFO L130 PetriNetUnfolder]: 1733/3279 cut-off events. [2022-12-13 15:02:50,728 INFO L131 PetriNetUnfolder]: For 45701/45725 co-relation queries the response was YES. [2022-12-13 15:02:50,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20883 conditions, 3279 events. 1733/3279 cut-off events. For 45701/45725 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 22378 event pairs, 380 based on Foata normal form. 162/3423 useless extension candidates. Maximal degree in co-relation 20228. Up to 1161 conditions per place. [2022-12-13 15:02:50,750 INFO L137 encePairwiseOnDemand]: 216/222 looper letters, 412 selfloop transitions, 52 changer transitions 13/486 dead transitions. [2022-12-13 15:02:50,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 486 transitions, 7126 flow [2022-12-13 15:02:50,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 15:02:50,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 15:02:50,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 975 transitions. [2022-12-13 15:02:50,752 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4391891891891892 [2022-12-13 15:02:50,752 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 975 transitions. [2022-12-13 15:02:50,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 975 transitions. [2022-12-13 15:02:50,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:02:50,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 975 transitions. [2022-12-13 15:02:50,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 97.5) internal successors, (975), 10 states have internal predecessors, (975), 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) [2022-12-13 15:02:50,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 222.0) internal successors, (2442), 11 states have internal predecessors, (2442), 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) [2022-12-13 15:02:50,754 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 222.0) internal successors, (2442), 11 states have internal predecessors, (2442), 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) [2022-12-13 15:02:50,754 INFO L175 Difference]: Start difference. First operand has 257 places, 265 transitions, 3449 flow. Second operand 10 states and 975 transitions. [2022-12-13 15:02:50,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 486 transitions, 7126 flow [2022-12-13 15:02:50,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 486 transitions, 6761 flow, removed 114 selfloop flow, removed 13 redundant places. [2022-12-13 15:02:50,885 INFO L231 Difference]: Finished difference. Result has 258 places, 306 transitions, 4050 flow [2022-12-13 15:02:50,885 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=3211, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4050, PETRI_PLACES=258, PETRI_TRANSITIONS=306} [2022-12-13 15:02:50,885 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 237 predicate places. [2022-12-13 15:02:50,885 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 306 transitions, 4050 flow [2022-12-13 15:02:50,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 93.73684210526316) internal successors, (1781), 19 states have internal predecessors, (1781), 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) [2022-12-13 15:02:50,885 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:02:50,885 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:50,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-13 15:02:51,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-13 15:02:51,087 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:02:51,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:51,088 INFO L85 PathProgramCache]: Analyzing trace with hash -879349566, now seen corresponding path program 28 times [2022-12-13 15:02:51,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:51,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414339867] [2022-12-13 15:02:51,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:51,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:51,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:51,209 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:02:51,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:02:51,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414339867] [2022-12-13 15:02:51,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414339867] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:02:51,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304259044] [2022-12-13 15:02:51,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:02:51,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:51,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:02:51,211 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:02:51,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 15:02:51,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:02:51,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:02:51,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 15:02:51,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:02:51,349 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:02:51,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:02:51,391 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:02:51,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304259044] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:02:51,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:02:51,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-12-13 15:02:51,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344451] [2022-12-13 15:02:51,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:02:51,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 15:02:51,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:51,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 15:02:51,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-12-13 15:02:51,527 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 222 [2022-12-13 15:02:51,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 306 transitions, 4050 flow. Second operand has 19 states, 19 states have (on average 93.89473684210526) internal successors, (1784), 19 states have internal predecessors, (1784), 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) [2022-12-13 15:02:51,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:02:51,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 222 [2022-12-13 15:02:51,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:02:52,282 INFO L130 PetriNetUnfolder]: 1460/2875 cut-off events. [2022-12-13 15:02:52,282 INFO L131 PetriNetUnfolder]: For 33119/33135 co-relation queries the response was YES. [2022-12-13 15:02:52,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18501 conditions, 2875 events. 1460/2875 cut-off events. For 33119/33135 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 20087 event pairs, 354 based on Foata normal form. 163/3035 useless extension candidates. Maximal degree in co-relation 17911. Up to 1162 conditions per place. [2022-12-13 15:02:52,304 INFO L137 encePairwiseOnDemand]: 216/222 looper letters, 303 selfloop transitions, 12 changer transitions 110/431 dead transitions. [2022-12-13 15:02:52,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 431 transitions, 6205 flow [2022-12-13 15:02:52,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 15:02:52,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 15:02:52,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 974 transitions. [2022-12-13 15:02:52,306 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43873873873873875 [2022-12-13 15:02:52,307 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 974 transitions. [2022-12-13 15:02:52,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 974 transitions. [2022-12-13 15:02:52,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:02:52,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 974 transitions. [2022-12-13 15:02:52,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 97.4) internal successors, (974), 10 states have internal predecessors, (974), 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) [2022-12-13 15:02:52,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 222.0) internal successors, (2442), 11 states have internal predecessors, (2442), 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) [2022-12-13 15:02:52,310 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 222.0) internal successors, (2442), 11 states have internal predecessors, (2442), 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) [2022-12-13 15:02:52,310 INFO L175 Difference]: Start difference. First operand has 258 places, 306 transitions, 4050 flow. Second operand 10 states and 974 transitions. [2022-12-13 15:02:52,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 431 transitions, 6205 flow [2022-12-13 15:02:52,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 431 transitions, 6158 flow, removed 20 selfloop flow, removed 3 redundant places. [2022-12-13 15:02:52,476 INFO L231 Difference]: Finished difference. Result has 268 places, 253 transitions, 3341 flow [2022-12-13 15:02:52,476 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=3943, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3341, PETRI_PLACES=268, PETRI_TRANSITIONS=253} [2022-12-13 15:02:52,476 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 247 predicate places. [2022-12-13 15:02:52,476 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 253 transitions, 3341 flow [2022-12-13 15:02:52,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 93.89473684210526) internal successors, (1784), 19 states have internal predecessors, (1784), 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) [2022-12-13 15:02:52,477 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:02:52,477 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:52,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-13 15:02:52,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-13 15:02:52,678 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:02:52,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:52,679 INFO L85 PathProgramCache]: Analyzing trace with hash 2104555214, now seen corresponding path program 29 times [2022-12-13 15:02:52,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:52,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387092153] [2022-12-13 15:02:52,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:52,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:52,797 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:02:52,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:02:52,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387092153] [2022-12-13 15:02:52,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387092153] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:02:52,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062645033] [2022-12-13 15:02:52,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:02:52,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:52,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:02:52,799 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:02:52,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-13 15:02:52,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 15:02:52,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:02:52,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:02:52,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:02:52,980 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:02:52,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:02:53,026 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:02:53,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062645033] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:02:53,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:02:53,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-12-13 15:02:53,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108985619] [2022-12-13 15:02:53,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:02:53,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 15:02:53,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:53,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 15:02:53,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-12-13 15:02:53,218 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 222 [2022-12-13 15:02:53,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 253 transitions, 3341 flow. Second operand has 17 states, 17 states have (on average 90.3529411764706) internal successors, (1536), 17 states have internal predecessors, (1536), 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) [2022-12-13 15:02:53,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:02:53,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 222 [2022-12-13 15:02:53,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:02:53,819 INFO L130 PetriNetUnfolder]: 886/1581 cut-off events. [2022-12-13 15:02:53,819 INFO L131 PetriNetUnfolder]: For 28195/28195 co-relation queries the response was YES. [2022-12-13 15:02:53,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11165 conditions, 1581 events. 886/1581 cut-off events. For 28195/28195 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 8544 event pairs, 86 based on Foata normal form. 200/1781 useless extension candidates. Maximal degree in co-relation 11027. Up to 876 conditions per place. [2022-12-13 15:02:53,830 INFO L137 encePairwiseOnDemand]: 215/222 looper letters, 142 selfloop transitions, 135 changer transitions 0/277 dead transitions. [2022-12-13 15:02:53,830 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 277 transitions, 4281 flow [2022-12-13 15:02:53,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 15:02:53,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 15:02:53,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1937 transitions. [2022-12-13 15:02:53,832 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41548691548691546 [2022-12-13 15:02:53,832 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1937 transitions. [2022-12-13 15:02:53,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1937 transitions. [2022-12-13 15:02:53,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:02:53,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1937 transitions. [2022-12-13 15:02:53,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 92.23809523809524) internal successors, (1937), 21 states have internal predecessors, (1937), 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) [2022-12-13 15:02:53,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 222.0) internal successors, (4884), 22 states have internal predecessors, (4884), 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) [2022-12-13 15:02:53,836 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 222.0) internal successors, (4884), 22 states have internal predecessors, (4884), 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) [2022-12-13 15:02:53,836 INFO L175 Difference]: Start difference. First operand has 268 places, 253 transitions, 3341 flow. Second operand 21 states and 1937 transitions. [2022-12-13 15:02:53,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 277 transitions, 4281 flow [2022-12-13 15:02:53,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 277 transitions, 3583 flow, removed 305 selfloop flow, removed 32 redundant places. [2022-12-13 15:02:53,913 INFO L231 Difference]: Finished difference. Result has 238 places, 240 transitions, 2957 flow [2022-12-13 15:02:53,913 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=2506, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2957, PETRI_PLACES=238, PETRI_TRANSITIONS=240} [2022-12-13 15:02:53,913 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 217 predicate places. [2022-12-13 15:02:53,913 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 240 transitions, 2957 flow [2022-12-13 15:02:53,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 90.3529411764706) internal successors, (1536), 17 states have internal predecessors, (1536), 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) [2022-12-13 15:02:53,914 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:02:53,914 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:53,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-13 15:02:54,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-13 15:02:54,115 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:02:54,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:54,116 INFO L85 PathProgramCache]: Analyzing trace with hash 407754677, now seen corresponding path program 30 times [2022-12-13 15:02:54,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:54,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404215385] [2022-12-13 15:02:54,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:54,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:54,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:54,241 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:02:54,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:02:54,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404215385] [2022-12-13 15:02:54,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404215385] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:02:54,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049083265] [2022-12-13 15:02:54,242 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:02:54,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:54,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:02:54,243 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:02:54,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-13 15:02:54,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 15:02:54,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:02:54,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 15:02:54,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:02:54,393 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:02:54,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:02:54,450 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:02:54,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049083265] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:02:54,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:02:54,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-12-13 15:02:54,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400248924] [2022-12-13 15:02:54,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:02:54,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:02:54,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:54,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:02:54,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:02:54,616 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 222 [2022-12-13 15:02:54,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 240 transitions, 2957 flow. Second operand has 20 states, 20 states have (on average 93.7) internal successors, (1874), 20 states have internal predecessors, (1874), 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) [2022-12-13 15:02:54,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:02:54,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 222 [2022-12-13 15:02:54,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:02:54,932 INFO L130 PetriNetUnfolder]: 640/1128 cut-off events. [2022-12-13 15:02:54,932 INFO L131 PetriNetUnfolder]: For 18819/18825 co-relation queries the response was YES. [2022-12-13 15:02:54,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8540 conditions, 1128 events. 640/1128 cut-off events. For 18819/18825 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5374 event pairs, 194 based on Foata normal form. 106/1228 useless extension candidates. Maximal degree in co-relation 8425. Up to 738 conditions per place. [2022-12-13 15:02:54,940 INFO L137 encePairwiseOnDemand]: 217/222 looper letters, 156 selfloop transitions, 92 changer transitions 0/255 dead transitions. [2022-12-13 15:02:54,940 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 255 transitions, 3782 flow [2022-12-13 15:02:54,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 15:02:54,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 15:02:54,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 866 transitions. [2022-12-13 15:02:54,942 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43343343343343343 [2022-12-13 15:02:54,942 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 866 transitions. [2022-12-13 15:02:54,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 866 transitions. [2022-12-13 15:02:54,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:02:54,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 866 transitions. [2022-12-13 15:02:54,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 96.22222222222223) internal successors, (866), 9 states have internal predecessors, (866), 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) [2022-12-13 15:02:54,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 222.0) internal successors, (2220), 10 states have internal predecessors, (2220), 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) [2022-12-13 15:02:54,944 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 222.0) internal successors, (2220), 10 states have internal predecessors, (2220), 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) [2022-12-13 15:02:54,944 INFO L175 Difference]: Start difference. First operand has 238 places, 240 transitions, 2957 flow. Second operand 9 states and 866 transitions. [2022-12-13 15:02:54,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 255 transitions, 3782 flow [2022-12-13 15:02:55,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 255 transitions, 3140 flow, removed 166 selfloop flow, removed 30 redundant places. [2022-12-13 15:02:55,003 INFO L231 Difference]: Finished difference. Result has 217 places, 242 transitions, 2655 flow [2022-12-13 15:02:55,003 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=2327, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2655, PETRI_PLACES=217, PETRI_TRANSITIONS=242} [2022-12-13 15:02:55,003 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 196 predicate places. [2022-12-13 15:02:55,003 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 242 transitions, 2655 flow [2022-12-13 15:02:55,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 93.7) internal successors, (1874), 20 states have internal predecessors, (1874), 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) [2022-12-13 15:02:55,003 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:02:55,004 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:55,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-13 15:02:55,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-13 15:02:55,205 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:02:55,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:55,205 INFO L85 PathProgramCache]: Analyzing trace with hash -757864505, now seen corresponding path program 31 times [2022-12-13 15:02:55,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:55,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590106788] [2022-12-13 15:02:55,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:55,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:55,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:55,970 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:02:55,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:02:55,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590106788] [2022-12-13 15:02:55,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590106788] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:02:55,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074195903] [2022-12-13 15:02:55,970 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:02:55,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:55,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:02:55,971 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:02:55,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-13 15:02:56,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:02:56,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2022-12-13 15:02:56,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:02:56,296 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:02:56,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:02:56,533 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:02:56,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 108 [2022-12-13 15:02:56,672 INFO L321 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2022-12-13 15:02:56,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 23 [2022-12-13 15:02:56,708 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:02:56,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074195903] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:02:56,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:02:56,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 30 [2022-12-13 15:02:56,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678622175] [2022-12-13 15:02:56,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:02:56,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 15:02:56,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:02:56,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 15:02:56,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2022-12-13 15:02:58,106 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 222 [2022-12-13 15:02:58,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 242 transitions, 2655 flow. Second operand has 32 states, 32 states have (on average 85.84375) internal successors, (2747), 32 states have internal predecessors, (2747), 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) [2022-12-13 15:02:58,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:02:58,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 222 [2022-12-13 15:02:58,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:02:59,335 INFO L130 PetriNetUnfolder]: 736/1292 cut-off events. [2022-12-13 15:02:59,335 INFO L131 PetriNetUnfolder]: For 21040/21040 co-relation queries the response was YES. [2022-12-13 15:02:59,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9462 conditions, 1292 events. 736/1292 cut-off events. For 21040/21040 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6276 event pairs, 144 based on Foata normal form. 1/1293 useless extension candidates. Maximal degree in co-relation 9358. Up to 1069 conditions per place. [2022-12-13 15:02:59,344 INFO L137 encePairwiseOnDemand]: 213/222 looper letters, 223 selfloop transitions, 93 changer transitions 1/317 dead transitions. [2022-12-13 15:02:59,344 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 317 transitions, 3996 flow [2022-12-13 15:02:59,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 15:02:59,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-13 15:02:59,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2477 transitions. [2022-12-13 15:02:59,346 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3984877734877735 [2022-12-13 15:02:59,346 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2477 transitions. [2022-12-13 15:02:59,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2477 transitions. [2022-12-13 15:02:59,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:02:59,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2477 transitions. [2022-12-13 15:02:59,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 88.46428571428571) internal successors, (2477), 28 states have internal predecessors, (2477), 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) [2022-12-13 15:02:59,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 222.0) internal successors, (6438), 29 states have internal predecessors, (6438), 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) [2022-12-13 15:02:59,351 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 222.0) internal successors, (6438), 29 states have internal predecessors, (6438), 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) [2022-12-13 15:02:59,351 INFO L175 Difference]: Start difference. First operand has 217 places, 242 transitions, 2655 flow. Second operand 28 states and 2477 transitions. [2022-12-13 15:02:59,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 317 transitions, 3996 flow [2022-12-13 15:02:59,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 317 transitions, 3828 flow, removed 19 selfloop flow, removed 8 redundant places. [2022-12-13 15:02:59,400 INFO L231 Difference]: Finished difference. Result has 242 places, 272 transitions, 3272 flow [2022-12-13 15:02:59,400 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=2499, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3272, PETRI_PLACES=242, PETRI_TRANSITIONS=272} [2022-12-13 15:02:59,400 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 221 predicate places. [2022-12-13 15:02:59,400 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 272 transitions, 3272 flow [2022-12-13 15:02:59,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 85.84375) internal successors, (2747), 32 states have internal predecessors, (2747), 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) [2022-12-13 15:02:59,401 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:02:59,401 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:02:59,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-13 15:02:59,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:02:59,601 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:02:59,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:02:59,602 INFO L85 PathProgramCache]: Analyzing trace with hash 306259727, now seen corresponding path program 32 times [2022-12-13 15:02:59,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:02:59,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449429330] [2022-12-13 15:02:59,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:02:59,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:02:59,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:03:00,192 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:03:00,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:03:00,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449429330] [2022-12-13 15:03:00,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449429330] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:03:00,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287043222] [2022-12-13 15:03:00,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:03:00,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:03:00,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:03:00,193 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:03:00,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-13 15:03:00,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:03:00,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:03:00,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2022-12-13 15:03:00,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:03:00,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:03:00,705 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:03:00,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 47 [2022-12-13 15:03:00,791 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:03:00,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:03:01,518 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:03:01,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 148 [2022-12-13 15:03:02,265 INFO L321 Elim1Store]: treesize reduction 62, result has 54.7 percent of original size [2022-12-13 15:03:02,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 85 [2022-12-13 15:03:02,596 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:03:02,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287043222] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:03:02,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:03:02,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 37 [2022-12-13 15:03:02,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81486043] [2022-12-13 15:03:02,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:03:02,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-13 15:03:02,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:03:02,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-13 15:03:02,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1323, Unknown=0, NotChecked=0, Total=1482 [2022-12-13 15:03:05,838 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 222 [2022-12-13 15:03:05,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 272 transitions, 3272 flow. Second operand has 39 states, 39 states have (on average 82.53846153846153) internal successors, (3219), 39 states have internal predecessors, (3219), 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) [2022-12-13 15:03:05,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:03:05,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 222 [2022-12-13 15:03:05,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:03:09,082 INFO L130 PetriNetUnfolder]: 919/1660 cut-off events. [2022-12-13 15:03:09,083 INFO L131 PetriNetUnfolder]: For 30486/30486 co-relation queries the response was YES. [2022-12-13 15:03:09,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12858 conditions, 1660 events. 919/1660 cut-off events. For 30486/30486 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8863 event pairs, 61 based on Foata normal form. 2/1662 useless extension candidates. Maximal degree in co-relation 12675. Up to 1062 conditions per place. [2022-12-13 15:03:09,094 INFO L137 encePairwiseOnDemand]: 210/222 looper letters, 272 selfloop transitions, 195 changer transitions 9/476 dead transitions. [2022-12-13 15:03:09,094 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 476 transitions, 6639 flow [2022-12-13 15:03:09,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-12-13 15:03:09,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-12-13 15:03:09,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4511 transitions. [2022-12-13 15:03:09,098 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38339282678905323 [2022-12-13 15:03:09,098 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4511 transitions. [2022-12-13 15:03:09,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4511 transitions. [2022-12-13 15:03:09,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:03:09,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4511 transitions. [2022-12-13 15:03:09,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 85.11320754716981) internal successors, (4511), 53 states have internal predecessors, (4511), 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) [2022-12-13 15:03:09,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 222.0) internal successors, (11988), 54 states have internal predecessors, (11988), 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) [2022-12-13 15:03:09,107 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 222.0) internal successors, (11988), 54 states have internal predecessors, (11988), 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) [2022-12-13 15:03:09,108 INFO L175 Difference]: Start difference. First operand has 242 places, 272 transitions, 3272 flow. Second operand 53 states and 4511 transitions. [2022-12-13 15:03:09,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 476 transitions, 6639 flow [2022-12-13 15:03:09,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 476 transitions, 5964 flow, removed 261 selfloop flow, removed 16 redundant places. [2022-12-13 15:03:09,185 INFO L231 Difference]: Finished difference. Result has 287 places, 385 transitions, 5240 flow [2022-12-13 15:03:09,185 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=2831, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=5240, PETRI_PLACES=287, PETRI_TRANSITIONS=385} [2022-12-13 15:03:09,185 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 266 predicate places. [2022-12-13 15:03:09,185 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 385 transitions, 5240 flow [2022-12-13 15:03:09,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 82.53846153846153) internal successors, (3219), 39 states have internal predecessors, (3219), 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) [2022-12-13 15:03:09,186 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:03:09,186 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:03:09,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-12-13 15:03:09,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-13 15:03:09,387 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:03:09,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:03:09,388 INFO L85 PathProgramCache]: Analyzing trace with hash 711923449, now seen corresponding path program 33 times [2022-12-13 15:03:09,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:03:09,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346823415] [2022-12-13 15:03:09,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:03:09,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:03:09,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:03:10,112 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:03:10,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:03:10,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346823415] [2022-12-13 15:03:10,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346823415] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:03:10,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215300249] [2022-12-13 15:03:10,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:03:10,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:03:10,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:03:10,113 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:03:10,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-13 15:03:10,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 15:03:10,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:03:10,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 121 conjunts are in the unsatisfiable core [2022-12-13 15:03:10,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:03:10,311 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 15 treesize of output 11 [2022-12-13 15:03:10,347 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 6 treesize of output 5 [2022-12-13 15:03:10,374 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 6 treesize of output 5 [2022-12-13 15:03:10,602 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:03:10,602 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 35 treesize of output 23 [2022-12-13 15:03:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:03:10,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:03:11,282 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:03:11,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215300249] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:03:11,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:03:11,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 10] total 33 [2022-12-13 15:03:11,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581922231] [2022-12-13 15:03:11,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:03:11,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-13 15:03:11,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:03:11,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-13 15:03:11,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2022-12-13 15:03:13,241 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 222 [2022-12-13 15:03:13,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 385 transitions, 5240 flow. Second operand has 35 states, 35 states have (on average 77.71428571428571) internal successors, (2720), 35 states have internal predecessors, (2720), 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) [2022-12-13 15:03:13,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:03:13,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 222 [2022-12-13 15:03:13,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:03:15,318 INFO L130 PetriNetUnfolder]: 1094/2006 cut-off events. [2022-12-13 15:03:15,318 INFO L131 PetriNetUnfolder]: For 44354/44354 co-relation queries the response was YES. [2022-12-13 15:03:15,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17402 conditions, 2006 events. 1094/2006 cut-off events. For 44354/44354 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11251 event pairs, 180 based on Foata normal form. 5/2011 useless extension candidates. Maximal degree in co-relation 17173. Up to 1510 conditions per place. [2022-12-13 15:03:15,332 INFO L137 encePairwiseOnDemand]: 212/222 looper letters, 334 selfloop transitions, 165 changer transitions 12/511 dead transitions. [2022-12-13 15:03:15,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 511 transitions, 8915 flow [2022-12-13 15:03:15,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 15:03:15,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-13 15:03:15,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2429 transitions. [2022-12-13 15:03:15,334 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3647147147147147 [2022-12-13 15:03:15,334 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2429 transitions. [2022-12-13 15:03:15,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2429 transitions. [2022-12-13 15:03:15,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:03:15,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2429 transitions. [2022-12-13 15:03:15,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 80.96666666666667) internal successors, (2429), 30 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) [2022-12-13 15:03:15,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 222.0) internal successors, (6882), 31 states have internal predecessors, (6882), 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) [2022-12-13 15:03:15,340 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 222.0) internal successors, (6882), 31 states have internal predecessors, (6882), 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) [2022-12-13 15:03:15,340 INFO L175 Difference]: Start difference. First operand has 287 places, 385 transitions, 5240 flow. Second operand 30 states and 2429 transitions. [2022-12-13 15:03:15,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 511 transitions, 8915 flow [2022-12-13 15:03:15,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 511 transitions, 7624 flow, removed 600 selfloop flow, removed 14 redundant places. [2022-12-13 15:03:15,469 INFO L231 Difference]: Finished difference. Result has 314 places, 438 transitions, 6571 flow [2022-12-13 15:03:15,470 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=4525, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=6571, PETRI_PLACES=314, PETRI_TRANSITIONS=438} [2022-12-13 15:03:15,470 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 293 predicate places. [2022-12-13 15:03:15,470 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 438 transitions, 6571 flow [2022-12-13 15:03:15,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 77.71428571428571) internal successors, (2720), 35 states have internal predecessors, (2720), 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) [2022-12-13 15:03:15,471 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:03:15,471 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:03:15,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-13 15:03:15,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-13 15:03:15,672 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:03:15,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:03:15,673 INFO L85 PathProgramCache]: Analyzing trace with hash 108702973, now seen corresponding path program 34 times [2022-12-13 15:03:15,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:03:15,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545233670] [2022-12-13 15:03:15,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:03:15,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:03:15,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:03:16,741 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:03:16,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:03:16,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545233670] [2022-12-13 15:03:16,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545233670] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:03:16,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657146936] [2022-12-13 15:03:16,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:03:16,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:03:16,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:03:16,743 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:03:16,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-13 15:03:16,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:03:16,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:03:16,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2022-12-13 15:03:16,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:03:17,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:03:17,189 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:03:17,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 39 [2022-12-13 15:03:17,246 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:03:17,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:03:17,959 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:03:17,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 147 [2022-12-13 15:03:18,369 INFO L321 Elim1Store]: treesize reduction 62, result has 54.7 percent of original size [2022-12-13 15:03:18,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 86 [2022-12-13 15:03:18,720 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:03:18,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657146936] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:03:18,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:03:18,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2022-12-13 15:03:18,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790919192] [2022-12-13 15:03:18,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:03:18,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-13 15:03:18,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:03:18,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-13 15:03:18,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1629, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 15:03:23,659 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 222 [2022-12-13 15:03:23,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 438 transitions, 6571 flow. Second operand has 43 states, 43 states have (on average 77.51162790697674) internal successors, (3333), 43 states have internal predecessors, (3333), 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) [2022-12-13 15:03:23,660 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:03:23,660 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 222 [2022-12-13 15:03:23,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:03:28,962 INFO L130 PetriNetUnfolder]: 1182/2162 cut-off events. [2022-12-13 15:03:28,962 INFO L131 PetriNetUnfolder]: For 50038/50038 co-relation queries the response was YES. [2022-12-13 15:03:28,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18880 conditions, 2162 events. 1182/2162 cut-off events. For 50038/50038 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12509 event pairs, 102 based on Foata normal form. 2/2164 useless extension candidates. Maximal degree in co-relation 18690. Up to 1385 conditions per place. [2022-12-13 15:03:28,979 INFO L137 encePairwiseOnDemand]: 210/222 looper letters, 321 selfloop transitions, 239 changer transitions 9/569 dead transitions. [2022-12-13 15:03:28,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 569 transitions, 9489 flow [2022-12-13 15:03:28,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-13 15:03:28,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-12-13 15:03:28,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 4164 transitions. [2022-12-13 15:03:28,983 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3607068607068607 [2022-12-13 15:03:28,983 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 4164 transitions. [2022-12-13 15:03:28,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 4164 transitions. [2022-12-13 15:03:28,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:03:28,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 4164 transitions. [2022-12-13 15:03:28,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 80.07692307692308) internal successors, (4164), 52 states have internal predecessors, (4164), 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) [2022-12-13 15:03:28,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 222.0) internal successors, (11766), 53 states have internal predecessors, (11766), 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) [2022-12-13 15:03:28,992 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 222.0) internal successors, (11766), 53 states have internal predecessors, (11766), 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) [2022-12-13 15:03:28,992 INFO L175 Difference]: Start difference. First operand has 314 places, 438 transitions, 6571 flow. Second operand 52 states and 4164 transitions. [2022-12-13 15:03:28,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 569 transitions, 9489 flow [2022-12-13 15:03:29,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 569 transitions, 8512 flow, removed 449 selfloop flow, removed 11 redundant places. [2022-12-13 15:03:29,166 INFO L231 Difference]: Finished difference. Result has 360 places, 475 transitions, 7520 flow [2022-12-13 15:03:29,167 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=5668, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=7520, PETRI_PLACES=360, PETRI_TRANSITIONS=475} [2022-12-13 15:03:29,167 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 339 predicate places. [2022-12-13 15:03:29,167 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 475 transitions, 7520 flow [2022-12-13 15:03:29,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 77.51162790697674) internal successors, (3333), 43 states have internal predecessors, (3333), 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) [2022-12-13 15:03:29,167 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:03:29,168 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:03:29,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-12-13 15:03:29,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-13 15:03:29,369 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:03:29,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:03:29,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1743280533, now seen corresponding path program 35 times [2022-12-13 15:03:29,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:03:29,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508530372] [2022-12-13 15:03:29,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:03:29,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:03:29,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:03:30,122 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:03:30,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:03:30,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508530372] [2022-12-13 15:03:30,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508530372] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:03:30,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193402611] [2022-12-13 15:03:30,122 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:03:30,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:03:30,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:03:30,123 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:03:30,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-13 15:03:30,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 15:03:30,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:03:30,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2022-12-13 15:03:30,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:03:30,465 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:03:30,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:03:30,699 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:03:30,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 108 [2022-12-13 15:03:30,844 INFO L321 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2022-12-13 15:03:30,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 23 [2022-12-13 15:03:30,882 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:03:30,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193402611] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:03:30,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:03:30,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 30 [2022-12-13 15:03:30,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059396185] [2022-12-13 15:03:30,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:03:30,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 15:03:30,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:03:30,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 15:03:30,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2022-12-13 15:03:32,582 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 222 [2022-12-13 15:03:32,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 475 transitions, 7520 flow. Second operand has 32 states, 32 states have (on average 83.84375) internal successors, (2683), 32 states have internal predecessors, (2683), 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) [2022-12-13 15:03:32,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:03:32,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 222 [2022-12-13 15:03:32,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:03:34,252 INFO L130 PetriNetUnfolder]: 1335/2451 cut-off events. [2022-12-13 15:03:34,252 INFO L131 PetriNetUnfolder]: For 67572/67572 co-relation queries the response was YES. [2022-12-13 15:03:34,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23029 conditions, 2451 events. 1335/2451 cut-off events. For 67572/67572 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14529 event pairs, 214 based on Foata normal form. 3/2454 useless extension candidates. Maximal degree in co-relation 22694. Up to 1819 conditions per place. [2022-12-13 15:03:34,271 INFO L137 encePairwiseOnDemand]: 213/222 looper letters, 386 selfloop transitions, 193 changer transitions 3/582 dead transitions. [2022-12-13 15:03:34,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 582 transitions, 11082 flow [2022-12-13 15:03:34,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 15:03:34,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 15:03:34,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2279 transitions. [2022-12-13 15:03:34,273 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3948371448371448 [2022-12-13 15:03:34,274 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2279 transitions. [2022-12-13 15:03:34,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2279 transitions. [2022-12-13 15:03:34,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:03:34,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2279 transitions. [2022-12-13 15:03:34,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 87.65384615384616) internal successors, (2279), 26 states have internal predecessors, (2279), 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) [2022-12-13 15:03:34,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 222.0) internal successors, (5994), 27 states have internal predecessors, (5994), 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) [2022-12-13 15:03:34,278 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 222.0) internal successors, (5994), 27 states have internal predecessors, (5994), 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) [2022-12-13 15:03:34,278 INFO L175 Difference]: Start difference. First operand has 360 places, 475 transitions, 7520 flow. Second operand 26 states and 2279 transitions. [2022-12-13 15:03:34,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 582 transitions, 11082 flow [2022-12-13 15:03:34,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 582 transitions, 9965 flow, removed 475 selfloop flow, removed 27 redundant places. [2022-12-13 15:03:34,499 INFO L231 Difference]: Finished difference. Result has 362 places, 509 transitions, 8620 flow [2022-12-13 15:03:34,499 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=6447, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=8620, PETRI_PLACES=362, PETRI_TRANSITIONS=509} [2022-12-13 15:03:34,499 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 341 predicate places. [2022-12-13 15:03:34,499 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 509 transitions, 8620 flow [2022-12-13 15:03:34,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 83.84375) internal successors, (2683), 32 states have internal predecessors, (2683), 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) [2022-12-13 15:03:34,500 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:03:34,500 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:03:34,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-13 15:03:34,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-13 15:03:34,701 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:03:34,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:03:34,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1043030595, now seen corresponding path program 36 times [2022-12-13 15:03:34,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:03:34,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130807233] [2022-12-13 15:03:34,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:03:34,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:03:34,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:03:35,361 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:03:35,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:03:35,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130807233] [2022-12-13 15:03:35,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130807233] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:03:35,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014667922] [2022-12-13 15:03:35,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:03:35,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:03:35,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:03:35,362 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:03:35,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-13 15:03:35,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 15:03:35,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:03:35,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2022-12-13 15:03:35,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:03:35,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:03:35,754 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:03:35,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 47 [2022-12-13 15:03:35,823 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:03:35,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:03:36,450 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:03:36,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 130 [2022-12-13 15:03:36,851 INFO L321 Elim1Store]: treesize reduction 58, result has 51.3 percent of original size [2022-12-13 15:03:36,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 71 [2022-12-13 15:03:37,184 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:03:37,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014667922] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:03:37,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:03:37,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-12-13 15:03:37,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188705578] [2022-12-13 15:03:37,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:03:37,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-13 15:03:37,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:03:37,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-13 15:03:37,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2022-12-13 15:03:41,204 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 222 [2022-12-13 15:03:41,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 509 transitions, 8620 flow. Second operand has 38 states, 38 states have (on average 83.44736842105263) internal successors, (3171), 38 states have internal predecessors, (3171), 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) [2022-12-13 15:03:41,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:03:41,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 222 [2022-12-13 15:03:41,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:03:43,934 INFO L130 PetriNetUnfolder]: 1667/3159 cut-off events. [2022-12-13 15:03:43,934 INFO L131 PetriNetUnfolder]: For 88695/88695 co-relation queries the response was YES. [2022-12-13 15:03:43,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28677 conditions, 3159 events. 1667/3159 cut-off events. For 88695/88695 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 20877 event pairs, 17 based on Foata normal form. 4/3163 useless extension candidates. Maximal degree in co-relation 28395. Up to 1952 conditions per place. [2022-12-13 15:03:43,958 INFO L137 encePairwiseOnDemand]: 212/222 looper letters, 425 selfloop transitions, 293 changer transitions 7/725 dead transitions. [2022-12-13 15:03:43,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 725 transitions, 14120 flow [2022-12-13 15:03:43,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 15:03:43,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-13 15:03:43,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2774 transitions. [2022-12-13 15:03:43,961 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39048423423423423 [2022-12-13 15:03:43,961 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2774 transitions. [2022-12-13 15:03:43,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2774 transitions. [2022-12-13 15:03:43,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:03:43,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2774 transitions. [2022-12-13 15:03:43,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 86.6875) internal successors, (2774), 32 states have internal predecessors, (2774), 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) [2022-12-13 15:03:43,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 222.0) internal successors, (7326), 33 states have internal predecessors, (7326), 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) [2022-12-13 15:03:43,966 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 222.0) internal successors, (7326), 33 states have internal predecessors, (7326), 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) [2022-12-13 15:03:43,966 INFO L175 Difference]: Start difference. First operand has 362 places, 509 transitions, 8620 flow. Second operand 32 states and 2774 transitions. [2022-12-13 15:03:43,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 725 transitions, 14120 flow [2022-12-13 15:03:44,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 725 transitions, 12271 flow, removed 821 selfloop flow, removed 19 redundant places. [2022-12-13 15:03:44,243 INFO L231 Difference]: Finished difference. Result has 378 places, 654 transitions, 11021 flow [2022-12-13 15:03:44,243 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=7333, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=11021, PETRI_PLACES=378, PETRI_TRANSITIONS=654} [2022-12-13 15:03:44,243 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 357 predicate places. [2022-12-13 15:03:44,243 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 654 transitions, 11021 flow [2022-12-13 15:03:44,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 83.44736842105263) internal successors, (3171), 38 states have internal predecessors, (3171), 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) [2022-12-13 15:03:44,244 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:03:44,244 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:03:44,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-12-13 15:03:44,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:03:44,445 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:03:44,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:03:44,445 INFO L85 PathProgramCache]: Analyzing trace with hash -23853047, now seen corresponding path program 37 times [2022-12-13 15:03:44,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:03:44,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377469964] [2022-12-13 15:03:44,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:03:44,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:03:44,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:03:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:03:45,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:03:45,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377469964] [2022-12-13 15:03:45,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377469964] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:03:45,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211533067] [2022-12-13 15:03:45,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:03:45,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:03:45,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:03:45,166 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:03:45,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-13 15:03:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:03:45,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2022-12-13 15:03:45,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:03:45,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:03:45,537 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:03:45,537 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 35 treesize of output 14 [2022-12-13 15:03:45,560 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:03:45,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:03:45,792 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:03:45,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 108 [2022-12-13 15:03:45,938 INFO L321 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2022-12-13 15:03:45,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 23 [2022-12-13 15:03:45,984 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:03:45,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211533067] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:03:45,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:03:45,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 27 [2022-12-13 15:03:45,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771773364] [2022-12-13 15:03:45,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:03:45,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 15:03:45,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:03:45,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 15:03:45,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2022-12-13 15:03:47,319 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 222 [2022-12-13 15:03:47,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 654 transitions, 11021 flow. Second operand has 29 states, 29 states have (on average 86.6896551724138) internal successors, (2514), 29 states have internal predecessors, (2514), 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) [2022-12-13 15:03:47,320 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:03:47,320 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 222 [2022-12-13 15:03:47,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:03:49,143 INFO L130 PetriNetUnfolder]: 1885/3591 cut-off events. [2022-12-13 15:03:49,143 INFO L131 PetriNetUnfolder]: For 89102/89102 co-relation queries the response was YES. [2022-12-13 15:03:49,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31614 conditions, 3591 events. 1885/3591 cut-off events. For 89102/89102 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 24381 event pairs, 321 based on Foata normal form. 4/3595 useless extension candidates. Maximal degree in co-relation 31304. Up to 3093 conditions per place. [2022-12-13 15:03:49,170 INFO L137 encePairwiseOnDemand]: 214/222 looper letters, 638 selfloop transitions, 128 changer transitions 2/768 dead transitions. [2022-12-13 15:03:49,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 768 transitions, 14508 flow [2022-12-13 15:03:49,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 15:03:49,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-13 15:03:49,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2075 transitions. [2022-12-13 15:03:49,172 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4063846455150803 [2022-12-13 15:03:49,173 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2075 transitions. [2022-12-13 15:03:49,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2075 transitions. [2022-12-13 15:03:49,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:03:49,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2075 transitions. [2022-12-13 15:03:49,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 90.21739130434783) internal successors, (2075), 23 states have internal predecessors, (2075), 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) [2022-12-13 15:03:49,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 222.0) internal successors, (5328), 24 states have internal predecessors, (5328), 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) [2022-12-13 15:03:49,178 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 222.0) internal successors, (5328), 24 states have internal predecessors, (5328), 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) [2022-12-13 15:03:49,178 INFO L175 Difference]: Start difference. First operand has 378 places, 654 transitions, 11021 flow. Second operand 23 states and 2075 transitions. [2022-12-13 15:03:49,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 768 transitions, 14508 flow [2022-12-13 15:03:49,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 768 transitions, 13942 flow, removed 235 selfloop flow, removed 19 redundant places. [2022-12-13 15:03:49,527 INFO L231 Difference]: Finished difference. Result has 390 places, 710 transitions, 12252 flow [2022-12-13 15:03:49,528 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=10491, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=12252, PETRI_PLACES=390, PETRI_TRANSITIONS=710} [2022-12-13 15:03:49,528 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 369 predicate places. [2022-12-13 15:03:49,528 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 710 transitions, 12252 flow [2022-12-13 15:03:49,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 86.6896551724138) internal successors, (2514), 29 states have internal predecessors, (2514), 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) [2022-12-13 15:03:49,528 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:03:49,528 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:03:49,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-12-13 15:03:49,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-12-13 15:03:49,729 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:03:49,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:03:49,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1374369961, now seen corresponding path program 38 times [2022-12-13 15:03:49,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:03:49,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932590911] [2022-12-13 15:03:49,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:03:49,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:03:49,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:03:50,513 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:03:50,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:03:50,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932590911] [2022-12-13 15:03:50,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932590911] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:03:50,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266784039] [2022-12-13 15:03:50,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:03:50,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:03:50,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:03:50,515 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:03:50,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-13 15:03:50,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:03:50,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:03:50,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2022-12-13 15:03:50,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:03:50,924 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:03:50,925 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 31 treesize of output 21 [2022-12-13 15:03:50,987 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:03:50,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:03:51,573 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:03:51,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 130 [2022-12-13 15:03:52,117 INFO L321 Elim1Store]: treesize reduction 58, result has 51.3 percent of original size [2022-12-13 15:03:52,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 71 [2022-12-13 15:03:52,412 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:03:52,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266784039] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:03:52,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:03:52,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-12-13 15:03:52,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368080455] [2022-12-13 15:03:52,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:03:52,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-13 15:03:52,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:03:52,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-13 15:03:52,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1213, Unknown=0, NotChecked=0, Total=1406 [2022-12-13 15:03:56,102 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 222 [2022-12-13 15:03:56,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 710 transitions, 12252 flow. Second operand has 38 states, 38 states have (on average 83.44736842105263) internal successors, (3171), 38 states have internal predecessors, (3171), 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) [2022-12-13 15:03:56,104 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:03:56,104 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 222 [2022-12-13 15:03:56,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:03:58,551 INFO L130 PetriNetUnfolder]: 1954/3722 cut-off events. [2022-12-13 15:03:58,551 INFO L131 PetriNetUnfolder]: For 93550/93550 co-relation queries the response was YES. [2022-12-13 15:03:58,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33205 conditions, 3722 events. 1954/3722 cut-off events. For 93550/93550 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 25468 event pairs, 314 based on Foata normal form. 4/3726 useless extension candidates. Maximal degree in co-relation 32941. Up to 3231 conditions per place. [2022-12-13 15:03:58,581 INFO L137 encePairwiseOnDemand]: 211/222 looper letters, 550 selfloop transitions, 246 changer transitions 4/800 dead transitions. [2022-12-13 15:03:58,581 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 800 transitions, 15261 flow [2022-12-13 15:03:58,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 15:03:58,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-13 15:03:58,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2767 transitions. [2022-12-13 15:03:58,584 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3894988738738739 [2022-12-13 15:03:58,584 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2767 transitions. [2022-12-13 15:03:58,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2767 transitions. [2022-12-13 15:03:58,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:03:58,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2767 transitions. [2022-12-13 15:03:58,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 86.46875) internal successors, (2767), 32 states have internal predecessors, (2767), 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) [2022-12-13 15:03:58,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 222.0) internal successors, (7326), 33 states have internal predecessors, (7326), 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) [2022-12-13 15:03:58,593 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 222.0) internal successors, (7326), 33 states have internal predecessors, (7326), 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) [2022-12-13 15:03:58,593 INFO L175 Difference]: Start difference. First operand has 390 places, 710 transitions, 12252 flow. Second operand 32 states and 2767 transitions. [2022-12-13 15:03:58,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 800 transitions, 15261 flow [2022-12-13 15:03:58,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 800 transitions, 14687 flow, removed 239 selfloop flow, removed 11 redundant places. [2022-12-13 15:03:59,005 INFO L231 Difference]: Finished difference. Result has 412 places, 741 transitions, 13120 flow [2022-12-13 15:03:59,006 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=11678, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=13120, PETRI_PLACES=412, PETRI_TRANSITIONS=741} [2022-12-13 15:03:59,006 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 391 predicate places. [2022-12-13 15:03:59,006 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 741 transitions, 13120 flow [2022-12-13 15:03:59,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 83.44736842105263) internal successors, (3171), 38 states have internal predecessors, (3171), 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) [2022-12-13 15:03:59,006 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:03:59,006 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:03:59,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-12-13 15:03:59,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:03:59,208 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:03:59,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:03:59,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1567098877, now seen corresponding path program 39 times [2022-12-13 15:03:59,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:03:59,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409434443] [2022-12-13 15:03:59,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:03:59,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:03:59,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:03:59,864 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:03:59,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:03:59,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409434443] [2022-12-13 15:03:59,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409434443] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:03:59,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718545462] [2022-12-13 15:03:59,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:03:59,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:03:59,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:03:59,865 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:03:59,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-13 15:04:00,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 15:04:00,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:04:00,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 121 conjunts are in the unsatisfiable core [2022-12-13 15:04:00,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:04:00,090 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 15 treesize of output 11 [2022-12-13 15:04:00,120 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 6 treesize of output 5 [2022-12-13 15:04:00,162 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 6 treesize of output 5 [2022-12-13 15:04:00,323 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:04:00,323 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 17 treesize of output 18 [2022-12-13 15:04:00,407 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:04:00,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:04:00,909 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:04:00,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718545462] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:04:00,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:04:00,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 11] total 38 [2022-12-13 15:04:00,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379666917] [2022-12-13 15:04:00,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:04:00,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-13 15:04:00,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:04:00,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-13 15:04:00,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1336, Unknown=2, NotChecked=0, Total=1560 [2022-12-13 15:04:02,243 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 222 [2022-12-13 15:04:02,244 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 741 transitions, 13120 flow. Second operand has 40 states, 40 states have (on average 62.5) internal successors, (2500), 40 states have internal predecessors, (2500), 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) [2022-12-13 15:04:02,245 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:04:02,245 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 222 [2022-12-13 15:04:02,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:04:06,548 INFO L130 PetriNetUnfolder]: 2085/3965 cut-off events. [2022-12-13 15:04:06,548 INFO L131 PetriNetUnfolder]: For 109479/109479 co-relation queries the response was YES. [2022-12-13 15:04:06,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36885 conditions, 3965 events. 2085/3965 cut-off events. For 109479/109479 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 27470 event pairs, 353 based on Foata normal form. 2/3967 useless extension candidates. Maximal degree in co-relation 36618. Up to 3267 conditions per place. [2022-12-13 15:04:06,580 INFO L137 encePairwiseOnDemand]: 211/222 looper letters, 537 selfloop transitions, 323 changer transitions 7/867 dead transitions. [2022-12-13 15:04:06,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 867 transitions, 17320 flow [2022-12-13 15:04:06,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-13 15:04:06,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-12-13 15:04:06,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2677 transitions. [2022-12-13 15:04:06,583 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2941111843550868 [2022-12-13 15:04:06,583 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2677 transitions. [2022-12-13 15:04:06,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2677 transitions. [2022-12-13 15:04:06,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:04:06,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2677 transitions. [2022-12-13 15:04:06,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 65.29268292682927) internal successors, (2677), 41 states have internal predecessors, (2677), 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) [2022-12-13 15:04:06,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 222.0) internal successors, (9324), 42 states have internal predecessors, (9324), 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) [2022-12-13 15:04:06,592 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 222.0) internal successors, (9324), 42 states have internal predecessors, (9324), 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) [2022-12-13 15:04:06,592 INFO L175 Difference]: Start difference. First operand has 412 places, 741 transitions, 13120 flow. Second operand 41 states and 2677 transitions. [2022-12-13 15:04:06,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 867 transitions, 17320 flow [2022-12-13 15:04:07,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 867 transitions, 16859 flow, removed 184 selfloop flow, removed 18 redundant places. [2022-12-13 15:04:07,023 INFO L231 Difference]: Finished difference. Result has 446 places, 794 transitions, 15512 flow [2022-12-13 15:04:07,023 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=12659, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=15512, PETRI_PLACES=446, PETRI_TRANSITIONS=794} [2022-12-13 15:04:07,024 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 425 predicate places. [2022-12-13 15:04:07,024 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 794 transitions, 15512 flow [2022-12-13 15:04:07,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 62.5) internal successors, (2500), 40 states have internal predecessors, (2500), 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) [2022-12-13 15:04:07,024 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:04:07,024 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:04:07,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-12-13 15:04:07,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:04:07,225 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:04:07,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:04:07,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1816802261, now seen corresponding path program 40 times [2022-12-13 15:04:07,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:04:07,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709645456] [2022-12-13 15:04:07,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:04:07,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:04:07,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:04:08,215 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:04:08,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:04:08,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709645456] [2022-12-13 15:04:08,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709645456] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:04:08,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796976058] [2022-12-13 15:04:08,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:04:08,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:04:08,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:04:08,216 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:04:08,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-12-13 15:04:08,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:04:08,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:04:08,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2022-12-13 15:04:08,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:04:08,638 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:04:08,638 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 15 treesize of output 16 [2022-12-13 15:04:08,690 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:04:08,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:04:09,329 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:04:09,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 138 [2022-12-13 15:04:09,744 INFO L321 Elim1Store]: treesize reduction 56, result has 55.9 percent of original size [2022-12-13 15:04:09,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 81 [2022-12-13 15:04:10,125 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:04:10,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796976058] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:04:10,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:04:10,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2022-12-13 15:04:10,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416962676] [2022-12-13 15:04:10,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:04:10,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-13 15:04:10,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:04:10,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-13 15:04:10,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 15:04:14,960 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 222 [2022-12-13 15:04:14,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 794 transitions, 15512 flow. Second operand has 43 states, 43 states have (on average 77.51162790697674) internal successors, (3333), 43 states have internal predecessors, (3333), 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) [2022-12-13 15:04:14,962 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:04:14,962 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 222 [2022-12-13 15:04:14,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:04:18,565 INFO L130 PetriNetUnfolder]: 2189/4160 cut-off events. [2022-12-13 15:04:18,565 INFO L131 PetriNetUnfolder]: For 169209/169209 co-relation queries the response was YES. [2022-12-13 15:04:18,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43784 conditions, 4160 events. 2189/4160 cut-off events. For 169209/169209 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 29103 event pairs, 379 based on Foata normal form. 5/4165 useless extension candidates. Maximal degree in co-relation 43504. Up to 3538 conditions per place. [2022-12-13 15:04:18,614 INFO L137 encePairwiseOnDemand]: 211/222 looper letters, 621 selfloop transitions, 265 changer transitions 3/889 dead transitions. [2022-12-13 15:04:18,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 889 transitions, 19517 flow [2022-12-13 15:04:18,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-13 15:04:18,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-12-13 15:04:18,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2963 transitions. [2022-12-13 15:04:18,619 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3607255904553202 [2022-12-13 15:04:18,619 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2963 transitions. [2022-12-13 15:04:18,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2963 transitions. [2022-12-13 15:04:18,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:04:18,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2963 transitions. [2022-12-13 15:04:18,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 80.08108108108108) internal successors, (2963), 37 states have internal predecessors, (2963), 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) [2022-12-13 15:04:18,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 222.0) internal successors, (8436), 38 states have internal predecessors, (8436), 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) [2022-12-13 15:04:18,628 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 222.0) internal successors, (8436), 38 states have internal predecessors, (8436), 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) [2022-12-13 15:04:18,628 INFO L175 Difference]: Start difference. First operand has 446 places, 794 transitions, 15512 flow. Second operand 37 states and 2963 transitions. [2022-12-13 15:04:18,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 889 transitions, 19517 flow [2022-12-13 15:04:19,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 889 transitions, 17488 flow, removed 910 selfloop flow, removed 26 redundant places. [2022-12-13 15:04:19,430 INFO L231 Difference]: Finished difference. Result has 459 places, 832 transitions, 16152 flow [2022-12-13 15:04:19,430 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=13916, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=793, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=16152, PETRI_PLACES=459, PETRI_TRANSITIONS=832} [2022-12-13 15:04:19,430 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 438 predicate places. [2022-12-13 15:04:19,430 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 832 transitions, 16152 flow [2022-12-13 15:04:19,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 77.51162790697674) internal successors, (3333), 43 states have internal predecessors, (3333), 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) [2022-12-13 15:04:19,431 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:04:19,431 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:04:19,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-12-13 15:04:19,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:04:19,632 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:04:19,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:04:19,632 INFO L85 PathProgramCache]: Analyzing trace with hash -915538975, now seen corresponding path program 41 times [2022-12-13 15:04:19,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:04:19,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677145193] [2022-12-13 15:04:19,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:04:19,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:04:19,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:04:20,466 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:04:20,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:04:20,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677145193] [2022-12-13 15:04:20,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677145193] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:04:20,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829018594] [2022-12-13 15:04:20,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:04:20,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:04:20,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:04:20,468 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:04:20,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-13 15:04:20,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 15:04:20,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:04:20,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2022-12-13 15:04:20,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:04:20,787 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:04:20,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:04:20,990 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:04:20,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 131 [2022-12-13 15:04:21,122 INFO L321 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2022-12-13 15:04:21,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2022-12-13 15:04:21,200 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:04:21,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829018594] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:04:21,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:04:21,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 31 [2022-12-13 15:04:21,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522832640] [2022-12-13 15:04:21,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:04:21,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 15:04:21,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:04:21,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 15:04:21,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 15:04:22,581 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 222 [2022-12-13 15:04:22,582 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 832 transitions, 16152 flow. Second operand has 33 states, 33 states have (on average 78.63636363636364) internal successors, (2595), 33 states have internal predecessors, (2595), 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) [2022-12-13 15:04:22,582 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:04:22,582 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 222 [2022-12-13 15:04:22,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:04:25,332 INFO L130 PetriNetUnfolder]: 2347/4460 cut-off events. [2022-12-13 15:04:25,332 INFO L131 PetriNetUnfolder]: For 176233/176233 co-relation queries the response was YES. [2022-12-13 15:04:25,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46736 conditions, 4460 events. 2347/4460 cut-off events. For 176233/176233 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 31629 event pairs, 398 based on Foata normal form. 4/4464 useless extension candidates. Maximal degree in co-relation 46454. Up to 3983 conditions per place. [2022-12-13 15:04:25,374 INFO L137 encePairwiseOnDemand]: 213/222 looper letters, 750 selfloop transitions, 194 changer transitions 2/946 dead transitions. [2022-12-13 15:04:25,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 946 transitions, 20825 flow [2022-12-13 15:04:25,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 15:04:25,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 15:04:25,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2121 transitions. [2022-12-13 15:04:25,376 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36746361746361744 [2022-12-13 15:04:25,376 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2121 transitions. [2022-12-13 15:04:25,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2121 transitions. [2022-12-13 15:04:25,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:04:25,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2121 transitions. [2022-12-13 15:04:25,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 81.57692307692308) internal successors, (2121), 26 states have internal predecessors, (2121), 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) [2022-12-13 15:04:25,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 222.0) internal successors, (5994), 27 states have internal predecessors, (5994), 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) [2022-12-13 15:04:25,380 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 222.0) internal successors, (5994), 27 states have internal predecessors, (5994), 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) [2022-12-13 15:04:25,380 INFO L175 Difference]: Start difference. First operand has 459 places, 832 transitions, 16152 flow. Second operand 26 states and 2121 transitions. [2022-12-13 15:04:25,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 946 transitions, 20825 flow [2022-12-13 15:04:26,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 946 transitions, 20174 flow, removed 262 selfloop flow, removed 24 redundant places. [2022-12-13 15:04:26,293 INFO L231 Difference]: Finished difference. Result has 468 places, 892 transitions, 18174 flow [2022-12-13 15:04:26,294 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=15535, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=832, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=657, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=18174, PETRI_PLACES=468, PETRI_TRANSITIONS=892} [2022-12-13 15:04:26,294 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 447 predicate places. [2022-12-13 15:04:26,294 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 892 transitions, 18174 flow [2022-12-13 15:04:26,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 78.63636363636364) internal successors, (2595), 33 states have internal predecessors, (2595), 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) [2022-12-13 15:04:26,295 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:04:26,295 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:04:26,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-12-13 15:04:26,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:04:26,496 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:04:26,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:04:26,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1771113139, now seen corresponding path program 42 times [2022-12-13 15:04:26,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:04:26,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972970089] [2022-12-13 15:04:26,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:04:26,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:04:26,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:04:27,291 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:04:27,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:04:27,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972970089] [2022-12-13 15:04:27,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972970089] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:04:27,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807936266] [2022-12-13 15:04:27,291 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:04:27,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:04:27,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:04:27,292 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:04:27,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-13 15:04:27,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 15:04:27,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:04:27,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2022-12-13 15:04:27,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:04:27,653 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:04:27,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:04:27,863 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:04:27,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 131 [2022-12-13 15:04:27,971 INFO L321 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2022-12-13 15:04:27,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2022-12-13 15:04:28,023 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:04:28,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807936266] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:04:28,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:04:28,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 30 [2022-12-13 15:04:28,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867500348] [2022-12-13 15:04:28,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:04:28,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 15:04:28,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:04:28,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 15:04:28,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2022-12-13 15:04:28,966 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 222 [2022-12-13 15:04:28,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 892 transitions, 18174 flow. Second operand has 32 states, 32 states have (on average 83.6875) internal successors, (2678), 32 states have internal predecessors, (2678), 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) [2022-12-13 15:04:28,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:04:28,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 222 [2022-12-13 15:04:28,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:04:31,968 INFO L130 PetriNetUnfolder]: 2491/4756 cut-off events. [2022-12-13 15:04:31,969 INFO L131 PetriNetUnfolder]: For 210894/210894 co-relation queries the response was YES. [2022-12-13 15:04:31,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52186 conditions, 4756 events. 2491/4756 cut-off events. For 210894/210894 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 34390 event pairs, 392 based on Foata normal form. 6/4762 useless extension candidates. Maximal degree in co-relation 51895. Up to 4090 conditions per place. [2022-12-13 15:04:32,013 INFO L137 encePairwiseOnDemand]: 214/222 looper letters, 770 selfloop transitions, 229 changer transitions 3/1002 dead transitions. [2022-12-13 15:04:32,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 1002 transitions, 23608 flow [2022-12-13 15:04:32,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 15:04:32,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-13 15:04:32,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2356 transitions. [2022-12-13 15:04:32,016 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39305972639305975 [2022-12-13 15:04:32,016 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2356 transitions. [2022-12-13 15:04:32,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2356 transitions. [2022-12-13 15:04:32,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:04:32,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2356 transitions. [2022-12-13 15:04:32,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 87.25925925925925) internal successors, (2356), 27 states have internal predecessors, (2356), 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) [2022-12-13 15:04:32,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 222.0) internal successors, (6216), 28 states have internal predecessors, (6216), 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) [2022-12-13 15:04:32,020 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 222.0) internal successors, (6216), 28 states have internal predecessors, (6216), 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) [2022-12-13 15:04:32,020 INFO L175 Difference]: Start difference. First operand has 468 places, 892 transitions, 18174 flow. Second operand 27 states and 2356 transitions. [2022-12-13 15:04:32,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 1002 transitions, 23608 flow [2022-12-13 15:04:32,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 1002 transitions, 22437 flow, removed 545 selfloop flow, removed 12 redundant places. [2022-12-13 15:04:32,945 INFO L231 Difference]: Finished difference. Result has 486 places, 930 transitions, 19957 flow [2022-12-13 15:04:32,945 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=17143, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=892, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=692, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=19957, PETRI_PLACES=486, PETRI_TRANSITIONS=930} [2022-12-13 15:04:32,945 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 465 predicate places. [2022-12-13 15:04:32,945 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 930 transitions, 19957 flow [2022-12-13 15:04:32,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 83.6875) internal successors, (2678), 32 states have internal predecessors, (2678), 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) [2022-12-13 15:04:32,946 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:04:32,946 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:04:32,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-12-13 15:04:33,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-12-13 15:04:33,147 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:04:33,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:04:33,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1890305331, now seen corresponding path program 43 times [2022-12-13 15:04:33,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:04:33,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92115416] [2022-12-13 15:04:33,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:04:33,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:04:33,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:04:34,042 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:04:34,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:04:34,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92115416] [2022-12-13 15:04:34,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92115416] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:04:34,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335292159] [2022-12-13 15:04:34,042 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:04:34,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:04:34,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:04:34,043 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:04:34,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-13 15:04:34,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:04:34,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 108 conjunts are in the unsatisfiable core [2022-12-13 15:04:34,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:04:34,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:04:34,305 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 19 treesize of output 21 [2022-12-13 15:04:34,488 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:04:34,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:04:34,717 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse3 (+ c_~A~0.offset 4)) (.cse4 (+ c_~A~0.offset 8)) (.cse1 (+ c_~A~0.offset .cse6 4)) (.cse2 (+ c_~A~0.offset .cse6))) (and (forall ((v_ArrVal_1616 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1616) c_~A~0.base))) (<= (+ (select .cse0 .cse1) c_~counter~0 (select .cse0 .cse2)) (+ (select .cse0 .cse3) (select .cse0 .cse4) (select .cse0 c_~A~0.offset))))) (forall ((v_ArrVal_1616 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1616) c_~A~0.base))) (< (+ (select .cse5 .cse3) (select .cse5 .cse4) (select .cse5 c_~A~0.offset)) (+ (select .cse5 .cse1) c_~counter~0 (select .cse5 .cse2) 1))))))) is different from false [2022-12-13 15:04:34,755 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:04:34,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 104 treesize of output 150 [2022-12-13 15:04:34,777 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:04:34,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 38 treesize of output 81 [2022-12-13 15:04:35,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:04:35,021 INFO L321 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2022-12-13 15:04:35,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 24 [2022-12-13 15:04:35,132 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:04:35,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335292159] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:04:35,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:04:35,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 37 [2022-12-13 15:04:35,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953848885] [2022-12-13 15:04:35,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:04:35,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-13 15:04:35,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:04:35,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-13 15:04:35,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1247, Unknown=1, NotChecked=72, Total=1482 [2022-12-13 15:04:35,392 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 222 [2022-12-13 15:04:35,393 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 930 transitions, 19957 flow. Second operand has 39 states, 39 states have (on average 62.43589743589744) internal successors, (2435), 39 states have internal predecessors, (2435), 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) [2022-12-13 15:04:35,393 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:04:35,393 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 222 [2022-12-13 15:04:35,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:04:39,431 INFO L130 PetriNetUnfolder]: 2644/5067 cut-off events. [2022-12-13 15:04:39,431 INFO L131 PetriNetUnfolder]: For 243970/243970 co-relation queries the response was YES. [2022-12-13 15:04:39,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57262 conditions, 5067 events. 2644/5067 cut-off events. For 243970/243970 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 37289 event pairs, 401 based on Foata normal form. 4/5071 useless extension candidates. Maximal degree in co-relation 56826. Up to 3842 conditions per place. [2022-12-13 15:04:39,494 INFO L137 encePairwiseOnDemand]: 215/222 looper letters, 652 selfloop transitions, 391 changer transitions 2/1045 dead transitions. [2022-12-13 15:04:39,495 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 1045 transitions, 25547 flow [2022-12-13 15:04:39,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 15:04:39,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-13 15:04:39,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1980 transitions. [2022-12-13 15:04:39,498 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2972972972972973 [2022-12-13 15:04:39,498 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1980 transitions. [2022-12-13 15:04:39,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1980 transitions. [2022-12-13 15:04:39,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:04:39,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1980 transitions. [2022-12-13 15:04:39,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 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) [2022-12-13 15:04:39,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 222.0) internal successors, (6882), 31 states have internal predecessors, (6882), 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) [2022-12-13 15:04:39,504 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 222.0) internal successors, (6882), 31 states have internal predecessors, (6882), 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) [2022-12-13 15:04:39,505 INFO L175 Difference]: Start difference. First operand has 486 places, 930 transitions, 19957 flow. Second operand 30 states and 1980 transitions. [2022-12-13 15:04:39,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 1045 transitions, 25547 flow [2022-12-13 15:04:40,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 1045 transitions, 23888 flow, removed 773 selfloop flow, removed 16 redundant places. [2022-12-13 15:04:40,800 INFO L231 Difference]: Finished difference. Result has 505 places, 971 transitions, 21769 flow [2022-12-13 15:04:40,800 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=18298, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=930, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=357, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=21769, PETRI_PLACES=505, PETRI_TRANSITIONS=971} [2022-12-13 15:04:40,801 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 484 predicate places. [2022-12-13 15:04:40,801 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 971 transitions, 21769 flow [2022-12-13 15:04:40,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 62.43589743589744) internal successors, (2435), 39 states have internal predecessors, (2435), 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) [2022-12-13 15:04:40,801 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:04:40,801 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:04:40,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-12-13 15:04:41,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-12-13 15:04:41,002 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:04:41,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:04:41,003 INFO L85 PathProgramCache]: Analyzing trace with hash -752659037, now seen corresponding path program 44 times [2022-12-13 15:04:41,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:04:41,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402416194] [2022-12-13 15:04:41,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:04:41,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:04:41,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:04:41,968 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:04:41,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:04:41,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402416194] [2022-12-13 15:04:41,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402416194] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:04:41,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451685279] [2022-12-13 15:04:41,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:04:41,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:04:41,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:04:41,969 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:04:41,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-12-13 15:04:42,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:04:42,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:04:42,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2022-12-13 15:04:42,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:04:42,347 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:04:42,348 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 15 treesize of output 16 [2022-12-13 15:04:42,403 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:04:42,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:04:42,946 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:04:42,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 157 [2022-12-13 15:04:43,343 INFO L321 Elim1Store]: treesize reduction 68, result has 53.7 percent of original size [2022-12-13 15:04:43,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 90 [2022-12-13 15:04:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:04:43,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451685279] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:04:43,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:04:43,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2022-12-13 15:04:43,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810006901] [2022-12-13 15:04:43,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:04:43,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-13 15:04:43,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:04:43,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-13 15:04:43,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1531, Unknown=0, NotChecked=0, Total=1722 [2022-12-13 15:04:48,977 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 222 [2022-12-13 15:04:48,978 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 971 transitions, 21769 flow. Second operand has 42 states, 42 states have (on average 78.38095238095238) internal successors, (3292), 42 states have internal predecessors, (3292), 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) [2022-12-13 15:04:48,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:04:48,979 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 222 [2022-12-13 15:04:48,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:04:53,247 INFO L130 PetriNetUnfolder]: 2699/5176 cut-off events. [2022-12-13 15:04:53,247 INFO L131 PetriNetUnfolder]: For 248191/248191 co-relation queries the response was YES. [2022-12-13 15:04:53,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58416 conditions, 5176 events. 2699/5176 cut-off events. For 248191/248191 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 38412 event pairs, 477 based on Foata normal form. 4/5180 useless extension candidates. Maximal degree in co-relation 58116. Up to 4753 conditions per place. [2022-12-13 15:04:53,299 INFO L137 encePairwiseOnDemand]: 211/222 looper letters, 835 selfloop transitions, 208 changer transitions 4/1047 dead transitions. [2022-12-13 15:04:53,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 1047 transitions, 25396 flow [2022-12-13 15:04:53,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 15:04:53,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-13 15:04:53,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2764 transitions. [2022-12-13 15:04:53,301 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3661897191308956 [2022-12-13 15:04:53,301 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2764 transitions. [2022-12-13 15:04:53,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2764 transitions. [2022-12-13 15:04:53,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:04:53,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2764 transitions. [2022-12-13 15:04:53,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 81.29411764705883) internal successors, (2764), 34 states have internal predecessors, (2764), 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) [2022-12-13 15:04:53,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 222.0) internal successors, (7770), 35 states have internal predecessors, (7770), 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) [2022-12-13 15:04:53,307 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 222.0) internal successors, (7770), 35 states have internal predecessors, (7770), 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) [2022-12-13 15:04:53,307 INFO L175 Difference]: Start difference. First operand has 505 places, 971 transitions, 21769 flow. Second operand 34 states and 2764 transitions. [2022-12-13 15:04:53,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 1047 transitions, 25396 flow [2022-12-13 15:04:54,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 1047 transitions, 23197 flow, removed 1015 selfloop flow, removed 18 redundant places. [2022-12-13 15:04:54,531 INFO L231 Difference]: Finished difference. Result has 522 places, 991 transitions, 21054 flow [2022-12-13 15:04:54,531 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=19596, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=971, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=775, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=21054, PETRI_PLACES=522, PETRI_TRANSITIONS=991} [2022-12-13 15:04:54,531 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 501 predicate places. [2022-12-13 15:04:54,532 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 991 transitions, 21054 flow [2022-12-13 15:04:54,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 78.38095238095238) internal successors, (3292), 42 states have internal predecessors, (3292), 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) [2022-12-13 15:04:54,532 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:04:54,532 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:04:54,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-12-13 15:04:54,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-12-13 15:04:54,733 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:04:54,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:04:54,734 INFO L85 PathProgramCache]: Analyzing trace with hash 86275315, now seen corresponding path program 45 times [2022-12-13 15:04:54,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:04:54,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114776380] [2022-12-13 15:04:54,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:04:54,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:04:54,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:04:55,364 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:04:55,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:04:55,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114776380] [2022-12-13 15:04:55,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114776380] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:04:55,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344468474] [2022-12-13 15:04:55,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:04:55,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:04:55,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:04:55,366 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:04:55,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-12-13 15:04:55,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 15:04:55,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:04:55,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 121 conjunts are in the unsatisfiable core [2022-12-13 15:04:55,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:04:55,524 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 15 treesize of output 11 [2022-12-13 15:04:55,564 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 6 treesize of output 5 [2022-12-13 15:04:55,589 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 6 treesize of output 5 [2022-12-13 15:04:55,781 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:04:55,781 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 35 treesize of output 23 [2022-12-13 15:04:55,877 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:04:55,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:04:56,300 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:04:56,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344468474] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:04:56,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:04:56,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 10] total 32 [2022-12-13 15:04:56,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749829337] [2022-12-13 15:04:56,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:04:56,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 15:04:56,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:04:56,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 15:04:56,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=967, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 15:04:58,048 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 222 [2022-12-13 15:04:58,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 991 transitions, 21054 flow. Second operand has 34 states, 34 states have (on average 77.61764705882354) internal successors, (2639), 34 states have internal predecessors, (2639), 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) [2022-12-13 15:04:58,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:04:58,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 222 [2022-12-13 15:04:58,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:05:02,149 INFO L130 PetriNetUnfolder]: 2832/5470 cut-off events. [2022-12-13 15:05:02,149 INFO L131 PetriNetUnfolder]: For 264862/264862 co-relation queries the response was YES. [2022-12-13 15:05:02,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61582 conditions, 5470 events. 2832/5470 cut-off events. For 264862/264862 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 41180 event pairs, 501 based on Foata normal form. 4/5474 useless extension candidates. Maximal degree in co-relation 61133. Up to 4794 conditions per place. [2022-12-13 15:05:02,243 INFO L137 encePairwiseOnDemand]: 212/222 looper letters, 922 selfloop transitions, 181 changer transitions 5/1108 dead transitions. [2022-12-13 15:05:02,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 1108 transitions, 26635 flow [2022-12-13 15:05:02,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 15:05:02,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-13 15:05:02,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2286 transitions. [2022-12-13 15:05:02,245 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36776061776061775 [2022-12-13 15:05:02,245 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2286 transitions. [2022-12-13 15:05:02,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2286 transitions. [2022-12-13 15:05:02,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:05:02,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2286 transitions. [2022-12-13 15:05:02,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 81.64285714285714) internal successors, (2286), 28 states have internal predecessors, (2286), 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) [2022-12-13 15:05:02,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 222.0) internal successors, (6438), 29 states have internal predecessors, (6438), 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) [2022-12-13 15:05:02,250 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 222.0) internal successors, (6438), 29 states have internal predecessors, (6438), 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) [2022-12-13 15:05:02,250 INFO L175 Difference]: Start difference. First operand has 522 places, 991 transitions, 21054 flow. Second operand 28 states and 2286 transitions. [2022-12-13 15:05:02,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 1108 transitions, 26635 flow [2022-12-13 15:05:03,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 1108 transitions, 26021 flow, removed 225 selfloop flow, removed 25 redundant places. [2022-12-13 15:05:03,699 INFO L231 Difference]: Finished difference. Result has 531 places, 1023 transitions, 22888 flow [2022-12-13 15:05:03,699 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=20450, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=991, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=830, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=22888, PETRI_PLACES=531, PETRI_TRANSITIONS=1023} [2022-12-13 15:05:03,700 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 510 predicate places. [2022-12-13 15:05:03,700 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 1023 transitions, 22888 flow [2022-12-13 15:05:03,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 77.61764705882354) internal successors, (2639), 34 states have internal predecessors, (2639), 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) [2022-12-13 15:05:03,700 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:05:03,700 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:05:03,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-12-13 15:05:03,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:05:03,901 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:05:03,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:05:03,902 INFO L85 PathProgramCache]: Analyzing trace with hash -244680589, now seen corresponding path program 46 times [2022-12-13 15:05:03,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:05:03,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263418822] [2022-12-13 15:05:03,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:05:03,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:05:03,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:05:04,546 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:05:04,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:05:04,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263418822] [2022-12-13 15:05:04,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263418822] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:05:04,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303623115] [2022-12-13 15:05:04,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:05:04,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:05:04,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:05:04,547 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:05:04,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-12-13 15:05:04,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:05:04,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:05:04,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2022-12-13 15:05:04,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:05:04,929 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:05:04,929 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 31 treesize of output 21 [2022-12-13 15:05:04,981 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:05:04,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:05:05,447 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:05:05,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 158 [2022-12-13 15:05:06,133 INFO L321 Elim1Store]: treesize reduction 68, result has 53.7 percent of original size [2022-12-13 15:05:06,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 89 [2022-12-13 15:05:06,521 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:05:06,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303623115] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:05:06,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:05:06,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-12-13 15:05:06,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100442825] [2022-12-13 15:05:06,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:05:06,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-13 15:05:06,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:05:06,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-13 15:05:06,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1208, Unknown=0, NotChecked=0, Total=1406 [2022-12-13 15:05:09,549 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 222 [2022-12-13 15:05:09,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 1023 transitions, 22888 flow. Second operand has 38 states, 38 states have (on average 83.44736842105263) internal successors, (3171), 38 states have internal predecessors, (3171), 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) [2022-12-13 15:05:09,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:05:09,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 222 [2022-12-13 15:05:09,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:05:13,251 INFO L130 PetriNetUnfolder]: 2879/5558 cut-off events. [2022-12-13 15:05:13,251 INFO L131 PetriNetUnfolder]: For 313245/313245 co-relation queries the response was YES. [2022-12-13 15:05:13,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65303 conditions, 5558 events. 2879/5558 cut-off events. For 313245/313245 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 42201 event pairs, 509 based on Foata normal form. 4/5562 useless extension candidates. Maximal degree in co-relation 64850. Up to 5125 conditions per place. [2022-12-13 15:05:13,308 INFO L137 encePairwiseOnDemand]: 212/222 looper letters, 892 selfloop transitions, 202 changer transitions 4/1098 dead transitions. [2022-12-13 15:05:13,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 1098 transitions, 26562 flow [2022-12-13 15:05:13,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 15:05:13,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-13 15:05:13,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2763 transitions. [2022-12-13 15:05:13,310 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3889358108108108 [2022-12-13 15:05:13,310 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2763 transitions. [2022-12-13 15:05:13,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2763 transitions. [2022-12-13 15:05:13,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:05:13,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2763 transitions. [2022-12-13 15:05:13,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 86.34375) internal successors, (2763), 32 states have internal predecessors, (2763), 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) [2022-12-13 15:05:13,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 222.0) internal successors, (7326), 33 states have internal predecessors, (7326), 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) [2022-12-13 15:05:13,315 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 222.0) internal successors, (7326), 33 states have internal predecessors, (7326), 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) [2022-12-13 15:05:13,315 INFO L175 Difference]: Start difference. First operand has 531 places, 1023 transitions, 22888 flow. Second operand 32 states and 2763 transitions. [2022-12-13 15:05:13,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 1098 transitions, 26562 flow [2022-12-13 15:05:14,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 546 places, 1098 transitions, 25454 flow, removed 488 selfloop flow, removed 16 redundant places. [2022-12-13 15:05:14,941 INFO L231 Difference]: Finished difference. Result has 548 places, 1042 transitions, 23143 flow [2022-12-13 15:05:14,942 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=21780, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1023, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=832, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=23143, PETRI_PLACES=548, PETRI_TRANSITIONS=1042} [2022-12-13 15:05:14,942 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 527 predicate places. [2022-12-13 15:05:14,942 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 1042 transitions, 23143 flow [2022-12-13 15:05:14,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 83.44736842105263) internal successors, (3171), 38 states have internal predecessors, (3171), 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) [2022-12-13 15:05:14,942 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:05:14,942 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:05:14,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-12-13 15:05:15,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-12-13 15:05:15,143 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:05:15,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:05:15,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1675083891, now seen corresponding path program 47 times [2022-12-13 15:05:15,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:05:15,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375795216] [2022-12-13 15:05:15,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:05:15,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:05:15,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:05:16,009 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:05:16,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:05:16,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375795216] [2022-12-13 15:05:16,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375795216] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:05:16,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221887283] [2022-12-13 15:05:16,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:05:16,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:05:16,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:05:16,010 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:05:16,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-12-13 15:05:16,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 15:05:16,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:05:16,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 114 conjunts are in the unsatisfiable core [2022-12-13 15:05:16,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:05:16,186 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 [2022-12-13 15:05:16,210 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 6 treesize of output 5 [2022-12-13 15:05:16,232 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 6 treesize of output 5 [2022-12-13 15:05:16,437 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:05:16,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:05:16,699 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:05:16,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221887283] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:05:16,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:05:16,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 8] total 35 [2022-12-13 15:05:16,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721403238] [2022-12-13 15:05:16,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:05:16,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-13 15:05:16,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:05:16,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-13 15:05:16,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2022-12-13 15:05:19,251 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 222 [2022-12-13 15:05:19,252 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 1042 transitions, 23143 flow. Second operand has 37 states, 37 states have (on average 78.51351351351352) internal successors, (2905), 37 states have internal predecessors, (2905), 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) [2022-12-13 15:05:19,252 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:05:19,252 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 222 [2022-12-13 15:05:19,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:05:23,780 INFO L130 PetriNetUnfolder]: 3070/5941 cut-off events. [2022-12-13 15:05:23,780 INFO L131 PetriNetUnfolder]: For 369603/369603 co-relation queries the response was YES. [2022-12-13 15:05:23,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72380 conditions, 5941 events. 3070/5941 cut-off events. For 369603/369603 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 45660 event pairs, 546 based on Foata normal form. 6/5947 useless extension candidates. Maximal degree in co-relation 71913. Up to 5202 conditions per place. [2022-12-13 15:05:23,858 INFO L137 encePairwiseOnDemand]: 213/222 looper letters, 913 selfloop transitions, 264 changer transitions 4/1181 dead transitions. [2022-12-13 15:05:23,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 1181 transitions, 29993 flow [2022-12-13 15:05:23,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 15:05:23,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-13 15:05:23,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2641 transitions. [2022-12-13 15:05:23,861 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37176238738738737 [2022-12-13 15:05:23,861 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2641 transitions. [2022-12-13 15:05:23,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2641 transitions. [2022-12-13 15:05:23,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:05:23,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2641 transitions. [2022-12-13 15:05:23,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 82.53125) internal successors, (2641), 32 states have internal predecessors, (2641), 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) [2022-12-13 15:05:23,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 222.0) internal successors, (7326), 33 states have internal predecessors, (7326), 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) [2022-12-13 15:05:23,869 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 222.0) internal successors, (7326), 33 states have internal predecessors, (7326), 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) [2022-12-13 15:05:23,869 INFO L175 Difference]: Start difference. First operand has 548 places, 1042 transitions, 23143 flow. Second operand 32 states and 2641 transitions. [2022-12-13 15:05:23,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 1181 transitions, 29993 flow [2022-12-13 15:05:25,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 1181 transitions, 29574 flow, removed 159 selfloop flow, removed 23 redundant places. [2022-12-13 15:05:25,905 INFO L231 Difference]: Finished difference. Result has 562 places, 1088 transitions, 26400 flow [2022-12-13 15:05:25,906 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=22732, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1042, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=808, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=26400, PETRI_PLACES=562, PETRI_TRANSITIONS=1088} [2022-12-13 15:05:25,906 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 541 predicate places. [2022-12-13 15:05:25,906 INFO L495 AbstractCegarLoop]: Abstraction has has 562 places, 1088 transitions, 26400 flow [2022-12-13 15:05:25,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 78.51351351351352) internal successors, (2905), 37 states have internal predecessors, (2905), 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) [2022-12-13 15:05:25,906 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:05:25,906 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:05:25,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-12-13 15:05:26,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:05:26,108 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:05:26,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:05:26,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1532382239, now seen corresponding path program 48 times [2022-12-13 15:05:26,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:05:26,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599495450] [2022-12-13 15:05:26,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:05:26,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:05:26,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:05:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:05:26,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:05:26,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599495450] [2022-12-13 15:05:26,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599495450] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:05:26,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096130557] [2022-12-13 15:05:26,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:05:26,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:05:26,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:05:26,885 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:05:26,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-12-13 15:05:27,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-13 15:05:27,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:05:27,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 112 conjunts are in the unsatisfiable core [2022-12-13 15:05:27,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:05:27,335 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:05:27,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 49 [2022-12-13 15:05:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:05:27,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:05:28,107 INFO L321 Elim1Store]: treesize reduction 100, result has 32.0 percent of original size [2022-12-13 15:05:28,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 58 [2022-12-13 15:05:28,145 INFO L321 Elim1Store]: treesize reduction 134, result has 8.8 percent of original size [2022-12-13 15:05:28,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 23 [2022-12-13 15:05:28,353 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:05:28,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096130557] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:05:28,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:05:28,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 12] total 39 [2022-12-13 15:05:28,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897478920] [2022-12-13 15:05:28,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:05:28,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-13 15:05:28,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:05:28,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-13 15:05:28,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1350, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 15:05:30,379 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 222 [2022-12-13 15:05:30,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 1088 transitions, 26400 flow. Second operand has 41 states, 41 states have (on average 77.46341463414635) internal successors, (3176), 41 states have internal predecessors, (3176), 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) [2022-12-13 15:05:30,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:05:30,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 222 [2022-12-13 15:05:30,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:05:42,455 INFO L130 PetriNetUnfolder]: 3397/6629 cut-off events. [2022-12-13 15:05:42,455 INFO L131 PetriNetUnfolder]: For 429318/429318 co-relation queries the response was YES. [2022-12-13 15:05:42,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82537 conditions, 6629 events. 3397/6629 cut-off events. For 429318/429318 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 52343 event pairs, 14 based on Foata normal form. 3/6632 useless extension candidates. Maximal degree in co-relation 81784. Up to 1973 conditions per place. [2022-12-13 15:05:42,527 INFO L137 encePairwiseOnDemand]: 210/222 looper letters, 590 selfloop transitions, 823 changer transitions 42/1455 dead transitions. [2022-12-13 15:05:42,527 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 625 places, 1455 transitions, 38660 flow [2022-12-13 15:05:42,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-12-13 15:05:42,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-12-13 15:05:42,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 5108 transitions. [2022-12-13 15:05:42,531 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35951576576576577 [2022-12-13 15:05:42,531 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 5108 transitions. [2022-12-13 15:05:42,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 5108 transitions. [2022-12-13 15:05:42,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:05:42,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 5108 transitions. [2022-12-13 15:05:42,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 79.8125) internal successors, (5108), 64 states have internal predecessors, (5108), 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) [2022-12-13 15:05:42,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 222.0) internal successors, (14430), 65 states have internal predecessors, (14430), 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) [2022-12-13 15:05:42,540 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 222.0) internal successors, (14430), 65 states have internal predecessors, (14430), 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) [2022-12-13 15:05:42,540 INFO L175 Difference]: Start difference. First operand has 562 places, 1088 transitions, 26400 flow. Second operand 64 states and 5108 transitions. [2022-12-13 15:05:42,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 625 places, 1455 transitions, 38660 flow [2022-12-13 15:05:44,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 1455 transitions, 35854 flow, removed 1334 selfloop flow, removed 15 redundant places. [2022-12-13 15:05:44,781 INFO L231 Difference]: Finished difference. Result has 624 places, 1332 transitions, 34732 flow [2022-12-13 15:05:44,781 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=24328, PETRI_DIFFERENCE_MINUEND_PLACES=547, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1088, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=624, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=34732, PETRI_PLACES=624, PETRI_TRANSITIONS=1332} [2022-12-13 15:05:44,781 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 603 predicate places. [2022-12-13 15:05:44,782 INFO L495 AbstractCegarLoop]: Abstraction has has 624 places, 1332 transitions, 34732 flow [2022-12-13 15:05:44,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 77.46341463414635) internal successors, (3176), 41 states have internal predecessors, (3176), 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) [2022-12-13 15:05:44,782 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:05:44,782 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:05:44,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-12-13 15:05:44,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:05:44,983 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:05:44,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:05:44,983 INFO L85 PathProgramCache]: Analyzing trace with hash 10085223, now seen corresponding path program 49 times [2022-12-13 15:05:44,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:05:44,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929961099] [2022-12-13 15:05:44,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:05:44,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:05:45,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:05:45,656 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:05:45,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:05:45,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929961099] [2022-12-13 15:05:45,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929961099] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:05:45,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031506491] [2022-12-13 15:05:45,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:05:45,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:05:45,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:05:45,657 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:05:45,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-12-13 15:05:45,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:05:45,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2022-12-13 15:05:45,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:05:45,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:05:45,970 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:05:45,970 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 35 treesize of output 14 [2022-12-13 15:05:45,993 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:05:45,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:05:46,157 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:05:46,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 131 [2022-12-13 15:05:46,319 INFO L321 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2022-12-13 15:05:46,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2022-12-13 15:05:46,393 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:05:46,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031506491] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:05:46,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:05:46,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 8] total 27 [2022-12-13 15:05:46,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128500961] [2022-12-13 15:05:46,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:05:46,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 15:05:46,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:05:46,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 15:05:46,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2022-12-13 15:05:47,910 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 222 [2022-12-13 15:05:47,911 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 624 places, 1332 transitions, 34732 flow. Second operand has 29 states, 29 states have (on average 86.6896551724138) internal successors, (2514), 29 states have internal predecessors, (2514), 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) [2022-12-13 15:05:47,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:05:47,911 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 222 [2022-12-13 15:05:47,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:05:52,711 INFO L130 PetriNetUnfolder]: 3410/6659 cut-off events. [2022-12-13 15:05:52,711 INFO L131 PetriNetUnfolder]: For 472815/472815 co-relation queries the response was YES. [2022-12-13 15:05:52,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88441 conditions, 6659 events. 3410/6659 cut-off events. For 472815/472815 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 52546 event pairs, 468 based on Foata normal form. 6/6665 useless extension candidates. Maximal degree in co-relation 87716. Up to 6414 conditions per place. [2022-12-13 15:05:52,798 INFO L137 encePairwiseOnDemand]: 215/222 looper letters, 1339 selfloop transitions, 68 changer transitions 12/1419 dead transitions. [2022-12-13 15:05:52,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 639 places, 1419 transitions, 41252 flow [2022-12-13 15:05:52,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 15:05:52,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 15:05:52,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1626 transitions. [2022-12-13 15:05:52,799 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4069069069069069 [2022-12-13 15:05:52,799 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1626 transitions. [2022-12-13 15:05:52,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1626 transitions. [2022-12-13 15:05:52,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:05:52,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1626 transitions. [2022-12-13 15:05:52,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 90.33333333333333) internal successors, (1626), 18 states have internal predecessors, (1626), 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) [2022-12-13 15:05:52,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 222.0) internal successors, (4218), 19 states have internal predecessors, (4218), 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) [2022-12-13 15:05:52,803 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 222.0) internal successors, (4218), 19 states have internal predecessors, (4218), 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) [2022-12-13 15:05:52,803 INFO L175 Difference]: Start difference. First operand has 624 places, 1332 transitions, 34732 flow. Second operand 18 states and 1626 transitions. [2022-12-13 15:05:52,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 639 places, 1419 transitions, 41252 flow [2022-12-13 15:05:57,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 1419 transitions, 36748 flow, removed 2178 selfloop flow, removed 29 redundant places. [2022-12-13 15:05:57,325 INFO L231 Difference]: Finished difference. Result has 614 places, 1360 transitions, 32921 flow [2022-12-13 15:05:57,325 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=30694, PETRI_DIFFERENCE_MINUEND_PLACES=593, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=32921, PETRI_PLACES=614, PETRI_TRANSITIONS=1360} [2022-12-13 15:05:57,326 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 593 predicate places. [2022-12-13 15:05:57,326 INFO L495 AbstractCegarLoop]: Abstraction has has 614 places, 1360 transitions, 32921 flow [2022-12-13 15:05:57,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 86.6896551724138) internal successors, (2514), 29 states have internal predecessors, (2514), 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) [2022-12-13 15:05:57,326 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:05:57,326 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:05:57,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-12-13 15:05:57,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-12-13 15:05:57,527 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:05:57,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:05:57,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1011899513, now seen corresponding path program 50 times [2022-12-13 15:05:57,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:05:57,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482542923] [2022-12-13 15:05:57,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:05:57,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:05:57,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:05:58,290 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:05:58,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:05:58,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482542923] [2022-12-13 15:05:58,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482542923] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:05:58,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629035371] [2022-12-13 15:05:58,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:05:58,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:05:58,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:05:58,292 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:05:58,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-12-13 15:05:58,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:05:58,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:05:58,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 107 conjunts are in the unsatisfiable core [2022-12-13 15:05:58,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:05:58,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:05:58,691 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:05:58,691 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 15 treesize of output 9 [2022-12-13 15:05:58,713 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:05:58,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:05:59,107 INFO L321 Elim1Store]: treesize reduction 26, result has 82.3 percent of original size [2022-12-13 15:05:59,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 132 [2022-12-13 15:05:59,311 INFO L321 Elim1Store]: treesize reduction 134, result has 8.8 percent of original size [2022-12-13 15:05:59,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 23 [2022-12-13 15:05:59,648 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:05:59,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629035371] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:05:59,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:05:59,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 38 [2022-12-13 15:05:59,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843904480] [2022-12-13 15:05:59,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:05:59,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-13 15:05:59,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:05:59,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-13 15:05:59,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1375, Unknown=0, NotChecked=0, Total=1560 [2022-12-13 15:06:03,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:06:05,000 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 222 [2022-12-13 15:06:05,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 1360 transitions, 32921 flow. Second operand has 40 states, 40 states have (on average 77.425) internal successors, (3097), 40 states have internal predecessors, (3097), 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) [2022-12-13 15:06:05,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:06:05,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 222 [2022-12-13 15:06:05,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:06:14,918 INFO L130 PetriNetUnfolder]: 4086/7783 cut-off events. [2022-12-13 15:06:14,918 INFO L131 PetriNetUnfolder]: For 445434/445434 co-relation queries the response was YES. [2022-12-13 15:06:14,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92860 conditions, 7783 events. 4086/7783 cut-off events. For 445434/445434 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 61732 event pairs, 236 based on Foata normal form. 8/7791 useless extension candidates. Maximal degree in co-relation 92145. Up to 3938 conditions per place. [2022-12-13 15:06:15,009 INFO L137 encePairwiseOnDemand]: 213/222 looper letters, 1120 selfloop transitions, 549 changer transitions 43/1712 dead transitions. [2022-12-13 15:06:15,009 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 653 places, 1712 transitions, 46462 flow [2022-12-13 15:06:15,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-13 15:06:15,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-12-13 15:06:15,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3260 transitions. [2022-12-13 15:06:15,012 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36711711711711714 [2022-12-13 15:06:15,012 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3260 transitions. [2022-12-13 15:06:15,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3260 transitions. [2022-12-13 15:06:15,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:06:15,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3260 transitions. [2022-12-13 15:06:15,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 81.5) internal successors, (3260), 40 states have internal predecessors, (3260), 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) [2022-12-13 15:06:15,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 222.0) internal successors, (9102), 41 states have internal predecessors, (9102), 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) [2022-12-13 15:06:15,018 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 222.0) internal successors, (9102), 41 states have internal predecessors, (9102), 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) [2022-12-13 15:06:15,018 INFO L175 Difference]: Start difference. First operand has 614 places, 1360 transitions, 32921 flow. Second operand 40 states and 3260 transitions. [2022-12-13 15:06:15,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 653 places, 1712 transitions, 46462 flow [2022-12-13 15:06:18,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 643 places, 1712 transitions, 44869 flow, removed 767 selfloop flow, removed 10 redundant places. [2022-12-13 15:06:18,619 INFO L231 Difference]: Finished difference. Result has 656 places, 1564 transitions, 41423 flow [2022-12-13 15:06:18,619 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=31452, PETRI_DIFFERENCE_MINUEND_PLACES=604, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=368, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=898, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=41423, PETRI_PLACES=656, PETRI_TRANSITIONS=1564} [2022-12-13 15:06:18,620 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 635 predicate places. [2022-12-13 15:06:18,620 INFO L495 AbstractCegarLoop]: Abstraction has has 656 places, 1564 transitions, 41423 flow [2022-12-13 15:06:18,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 77.425) internal successors, (3097), 40 states have internal predecessors, (3097), 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) [2022-12-13 15:06:18,620 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:06:18,620 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:06:18,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-12-13 15:06:18,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-12-13 15:06:18,821 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:06:18,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:06:18,822 INFO L85 PathProgramCache]: Analyzing trace with hash 187502673, now seen corresponding path program 51 times [2022-12-13 15:06:18,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:06:18,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881749898] [2022-12-13 15:06:18,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:06:18,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:06:18,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:06:19,629 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:06:19,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:06:19,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881749898] [2022-12-13 15:06:19,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881749898] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:06:19,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771775279] [2022-12-13 15:06:19,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:06:19,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:06:19,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:06:19,630 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:06:19,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-12-13 15:06:19,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 15:06:19,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:06:19,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 121 conjunts are in the unsatisfiable core [2022-12-13 15:06:19,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:06:19,805 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 15 treesize of output 11 [2022-12-13 15:06:19,836 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 6 treesize of output 5 [2022-12-13 15:06:19,855 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 6 treesize of output 5 [2022-12-13 15:06:20,048 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:06:20,048 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 17 treesize of output 18 [2022-12-13 15:06:20,145 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:06:20,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:06:20,545 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:06:20,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771775279] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:06:20,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:06:20,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 10] total 37 [2022-12-13 15:06:20,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715124807] [2022-12-13 15:06:20,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:06:20,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-13 15:06:20,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:06:20,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-13 15:06:20,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2022-12-13 15:06:22,738 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 222 [2022-12-13 15:06:22,739 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 656 places, 1564 transitions, 41423 flow. Second operand has 39 states, 39 states have (on average 77.53846153846153) internal successors, (3024), 39 states have internal predecessors, (3024), 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) [2022-12-13 15:06:22,739 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:06:22,740 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 222 [2022-12-13 15:06:22,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:06:33,109 INFO L130 PetriNetUnfolder]: 4092/7856 cut-off events. [2022-12-13 15:06:33,109 INFO L131 PetriNetUnfolder]: For 480228/480228 co-relation queries the response was YES. [2022-12-13 15:06:33,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96471 conditions, 7856 events. 4092/7856 cut-off events. For 480228/480228 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 62677 event pairs, 431 based on Foata normal form. 3/7859 useless extension candidates. Maximal degree in co-relation 95735. Up to 7200 conditions per place. [2022-12-13 15:06:33,229 INFO L137 encePairwiseOnDemand]: 212/222 looper letters, 1424 selfloop transitions, 254 changer transitions 12/1690 dead transitions. [2022-12-13 15:06:33,229 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 695 places, 1690 transitions, 47571 flow [2022-12-13 15:06:33,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-13 15:06:33,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-12-13 15:06:33,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3218 transitions. [2022-12-13 15:06:33,233 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3623873873873874 [2022-12-13 15:06:33,233 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3218 transitions. [2022-12-13 15:06:33,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3218 transitions. [2022-12-13 15:06:33,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:06:33,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3218 transitions. [2022-12-13 15:06:33,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 80.45) internal successors, (3218), 40 states have internal predecessors, (3218), 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) [2022-12-13 15:06:33,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 222.0) internal successors, (9102), 41 states have internal predecessors, (9102), 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) [2022-12-13 15:06:33,242 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 222.0) internal successors, (9102), 41 states have internal predecessors, (9102), 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) [2022-12-13 15:06:33,243 INFO L175 Difference]: Start difference. First operand has 656 places, 1564 transitions, 41423 flow. Second operand 40 states and 3218 transitions. [2022-12-13 15:06:33,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 695 places, 1690 transitions, 47571 flow [2022-12-13 15:06:38,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 680 places, 1690 transitions, 43726 flow, removed 1893 selfloop flow, removed 15 redundant places. [2022-12-13 15:06:38,451 INFO L231 Difference]: Finished difference. Result has 689 places, 1601 transitions, 40093 flow [2022-12-13 15:06:38,451 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=37592, PETRI_DIFFERENCE_MINUEND_PLACES=641, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=40093, PETRI_PLACES=689, PETRI_TRANSITIONS=1601} [2022-12-13 15:06:38,452 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 668 predicate places. [2022-12-13 15:06:38,452 INFO L495 AbstractCegarLoop]: Abstraction has has 689 places, 1601 transitions, 40093 flow [2022-12-13 15:06:38,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 77.53846153846153) internal successors, (3024), 39 states have internal predecessors, (3024), 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) [2022-12-13 15:06:38,452 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:06:38,452 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:06:38,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-12-13 15:06:38,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-12-13 15:06:38,653 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:06:38,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:06:38,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1560334245, now seen corresponding path program 52 times [2022-12-13 15:06:38,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:06:38,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994899537] [2022-12-13 15:06:38,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:06:38,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:06:38,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:06:39,408 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:06:39,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:06:39,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994899537] [2022-12-13 15:06:39,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994899537] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:06:39,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117298431] [2022-12-13 15:06:39,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:06:39,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:06:39,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:06:39,409 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:06:39,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-12-13 15:06:39,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:06:39,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:06:39,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 108 conjunts are in the unsatisfiable core [2022-12-13 15:06:39,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:06:39,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:06:39,682 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 19 treesize of output 21 [2022-12-13 15:06:39,861 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:06:39,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:06:40,231 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:06:40,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 104 treesize of output 150 [2022-12-13 15:06:40,257 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:06:40,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 38 treesize of output 81 [2022-12-13 15:06:40,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:06:40,616 INFO L321 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2022-12-13 15:06:40,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 24 [2022-12-13 15:06:40,735 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:06:40,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117298431] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:06:40,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:06:40,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 35 [2022-12-13 15:06:40,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179395544] [2022-12-13 15:06:40,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:06:40,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-13 15:06:40,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:06:40,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-13 15:06:40,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1196, Unknown=16, NotChecked=0, Total=1332 [2022-12-13 15:06:43,414 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 222 [2022-12-13 15:06:43,415 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 689 places, 1601 transitions, 40093 flow. Second operand has 37 states, 37 states have (on average 62.567567567567565) internal successors, (2315), 37 states have internal predecessors, (2315), 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) [2022-12-13 15:06:43,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:06:43,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 222 [2022-12-13 15:06:43,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:06:49,629 INFO L130 PetriNetUnfolder]: 4173/8018 cut-off events. [2022-12-13 15:06:49,629 INFO L131 PetriNetUnfolder]: For 459696/459696 co-relation queries the response was YES. [2022-12-13 15:06:49,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95550 conditions, 8018 events. 4173/8018 cut-off events. For 459696/459696 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 64433 event pairs, 471 based on Foata normal form. 3/8021 useless extension candidates. Maximal degree in co-relation 94802. Up to 7212 conditions per place. [2022-12-13 15:06:49,863 INFO L137 encePairwiseOnDemand]: 214/222 looper letters, 1384 selfloop transitions, 281 changer transitions 5/1670 dead transitions. [2022-12-13 15:06:49,864 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 710 places, 1670 transitions, 45124 flow [2022-12-13 15:06:49,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 15:06:49,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 15:06:49,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1446 transitions. [2022-12-13 15:06:49,866 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.29606879606879605 [2022-12-13 15:06:49,866 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1446 transitions. [2022-12-13 15:06:49,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1446 transitions. [2022-12-13 15:06:49,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:06:49,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1446 transitions. [2022-12-13 15:06:49,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 65.72727272727273) internal successors, (1446), 22 states have internal predecessors, (1446), 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) [2022-12-13 15:06:49,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 222.0) internal successors, (5106), 23 states have internal predecessors, (5106), 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) [2022-12-13 15:06:49,869 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 222.0) internal successors, (5106), 23 states have internal predecessors, (5106), 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) [2022-12-13 15:06:49,869 INFO L175 Difference]: Start difference. First operand has 689 places, 1601 transitions, 40093 flow. Second operand 22 states and 1446 transitions. [2022-12-13 15:06:49,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 710 places, 1670 transitions, 45124 flow [2022-12-13 15:06:54,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 684 places, 1670 transitions, 43824 flow, removed 555 selfloop flow, removed 26 redundant places. [2022-12-13 15:06:54,827 INFO L231 Difference]: Finished difference. Result has 689 places, 1625 transitions, 40708 flow [2022-12-13 15:06:54,828 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=38793, PETRI_DIFFERENCE_MINUEND_PLACES=663, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=40708, PETRI_PLACES=689, PETRI_TRANSITIONS=1625} [2022-12-13 15:06:54,828 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 668 predicate places. [2022-12-13 15:06:54,828 INFO L495 AbstractCegarLoop]: Abstraction has has 689 places, 1625 transitions, 40708 flow [2022-12-13 15:06:54,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 62.567567567567565) internal successors, (2315), 37 states have internal predecessors, (2315), 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) [2022-12-13 15:06:54,828 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:06:54,828 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:06:54,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-12-13 15:06:55,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-12-13 15:06:55,029 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:06:55,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:06:55,030 INFO L85 PathProgramCache]: Analyzing trace with hash -847719345, now seen corresponding path program 53 times [2022-12-13 15:06:55,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:06:55,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869048431] [2022-12-13 15:06:55,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:06:55,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:06:55,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:06:55,827 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:06:55,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:06:55,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869048431] [2022-12-13 15:06:55,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869048431] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:06:55,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896992191] [2022-12-13 15:06:55,827 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:06:55,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:06:55,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:06:55,828 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:06:55,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-12-13 15:06:55,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 15:06:55,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:06:55,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 110 conjunts are in the unsatisfiable core [2022-12-13 15:06:55,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:06:56,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:06:56,121 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 30 [2022-12-13 15:06:56,295 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:06:56,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:06:56,574 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse3 (+ c_~A~0.offset 4)) (.cse4 (+ c_~A~0.offset 8)) (.cse0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse6))) (.cse2 (+ c_~A~0.offset .cse6 4))) (and (forall ((v_ArrVal_2010 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2010) c_~A~0.base))) (<= (+ .cse0 (select .cse1 .cse2) c_~counter~0) (+ (select .cse1 .cse3) (select .cse1 c_~A~0.offset) (select .cse1 .cse4))))) (forall ((v_ArrVal_2010 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2010) c_~A~0.base))) (< (+ (select .cse5 .cse3) (select .cse5 c_~A~0.offset) (select .cse5 .cse4)) (+ .cse0 (select .cse5 .cse2) c_~counter~0 1))))))) is different from false [2022-12-13 15:06:56,613 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:06:56,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 143 [2022-12-13 15:06:56,629 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:06:56,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 49 [2022-12-13 15:06:56,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:06:56,818 INFO L321 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2022-12-13 15:06:56,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 24 [2022-12-13 15:06:56,902 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 3 not checked. [2022-12-13 15:06:56,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896992191] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:06:56,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:06:56,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 36 [2022-12-13 15:06:56,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172186156] [2022-12-13 15:06:56,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:06:56,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-13 15:06:56,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:06:56,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-13 15:06:56,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1199, Unknown=10, NotChecked=70, Total=1406 [2022-12-13 15:06:56,978 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 222 [2022-12-13 15:06:56,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 689 places, 1625 transitions, 40708 flow. Second operand has 38 states, 38 states have (on average 62.578947368421055) internal successors, (2378), 38 states have internal predecessors, (2378), 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) [2022-12-13 15:06:56,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:06:56,979 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 222 [2022-12-13 15:06:56,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:07:03,805 INFO L130 PetriNetUnfolder]: 4267/8205 cut-off events. [2022-12-13 15:07:03,805 INFO L131 PetriNetUnfolder]: For 470448/470448 co-relation queries the response was YES. [2022-12-13 15:07:03,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98247 conditions, 8205 events. 4267/8205 cut-off events. For 470448/470448 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 66447 event pairs, 440 based on Foata normal form. 3/8208 useless extension candidates. Maximal degree in co-relation 97482. Up to 7213 conditions per place. [2022-12-13 15:07:03,938 INFO L137 encePairwiseOnDemand]: 212/222 looper letters, 1371 selfloop transitions, 326 changer transitions 5/1702 dead transitions. [2022-12-13 15:07:03,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 711 places, 1702 transitions, 46187 flow [2022-12-13 15:07:03,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 15:07:03,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-13 15:07:03,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1512 transitions. [2022-12-13 15:07:03,940 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.29612220916568743 [2022-12-13 15:07:03,940 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1512 transitions. [2022-12-13 15:07:03,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1512 transitions. [2022-12-13 15:07:03,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:07:03,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1512 transitions. [2022-12-13 15:07:03,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 65.73913043478261) internal successors, (1512), 23 states have internal predecessors, (1512), 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) [2022-12-13 15:07:03,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 222.0) internal successors, (5328), 24 states have internal predecessors, (5328), 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) [2022-12-13 15:07:03,944 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 222.0) internal successors, (5328), 24 states have internal predecessors, (5328), 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) [2022-12-13 15:07:03,944 INFO L175 Difference]: Start difference. First operand has 689 places, 1625 transitions, 40708 flow. Second operand 23 states and 1512 transitions. [2022-12-13 15:07:03,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 711 places, 1702 transitions, 46187 flow [2022-12-13 15:07:09,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 698 places, 1702 transitions, 45218 flow, removed 363 selfloop flow, removed 13 redundant places. [2022-12-13 15:07:09,832 INFO L231 Difference]: Finished difference. Result has 704 places, 1656 transitions, 42172 flow [2022-12-13 15:07:09,833 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=39759, PETRI_DIFFERENCE_MINUEND_PLACES=676, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=42172, PETRI_PLACES=704, PETRI_TRANSITIONS=1656} [2022-12-13 15:07:09,833 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 683 predicate places. [2022-12-13 15:07:09,833 INFO L495 AbstractCegarLoop]: Abstraction has has 704 places, 1656 transitions, 42172 flow [2022-12-13 15:07:09,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 62.578947368421055) internal successors, (2378), 38 states have internal predecessors, (2378), 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) [2022-12-13 15:07:09,834 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:07:09,834 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:07:09,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-12-13 15:07:10,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:07:10,035 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:07:10,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:07:10,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1854470985, now seen corresponding path program 54 times [2022-12-13 15:07:10,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:07:10,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049860363] [2022-12-13 15:07:10,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:07:10,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:07:10,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:07:10,669 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:07:10,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:07:10,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049860363] [2022-12-13 15:07:10,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049860363] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:07:10,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704566223] [2022-12-13 15:07:10,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:07:10,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:07:10,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:07:10,671 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:07:10,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-12-13 15:07:10,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 15:07:10,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:07:10,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 122 conjunts are in the unsatisfiable core [2022-12-13 15:07:10,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:07:10,923 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 [2022-12-13 15:07:10,971 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 6 treesize of output 5 [2022-12-13 15:07:11,012 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 6 treesize of output 5 [2022-12-13 15:07:11,293 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:07:11,293 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 15 treesize of output 16 [2022-12-13 15:07:11,367 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:07:11,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:07:14,391 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset 8))) (and (forall ((v_subst_18 Int) (v_ArrVal_2052 (Array Int Int))) (or (< (+ v_subst_18 1) c_~N~0) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2052) c_~A~0.base))) (< (select .cse0 (+ c_~A~0.offset (* v_subst_18 4))) (+ c_~counter~0 (select .cse0 .cse1) 1))) (not (< v_subst_18 c_~N~0)))) (forall ((v_subst_17 Int) (v_ArrVal_2052 (Array Int Int))) (or (not (< v_subst_17 c_~N~0)) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2052) c_~A~0.base))) (<= (+ c_~counter~0 (select .cse2 .cse1)) (select .cse2 (+ c_~A~0.offset (* v_subst_17 4))))) (< (+ v_subst_17 1) c_~N~0))))) is different from false [2022-12-13 15:07:15,510 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:07:15,511 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 55 treesize of output 44 [2022-12-13 15:07:15,520 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:07:15,520 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 94 treesize of output 90 [2022-12-13 15:07:15,530 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:07:15,530 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 80 treesize of output 70 [2022-12-13 15:07:15,539 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:07:15,539 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 34 treesize of output 35 [2022-12-13 15:07:15,610 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:07:15,610 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 56 treesize of output 45 [2022-12-13 15:07:15,622 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 15:07:15,622 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 206 treesize of output 182 [2022-12-13 15:07:15,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:07:15,630 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 66 [2022-12-13 15:07:15,640 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 15:07:15,641 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 154 treesize of output 118 [2022-12-13 15:07:15,803 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:07:15,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704566223] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:07:15,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:07:15,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 42 [2022-12-13 15:07:15,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942692805] [2022-12-13 15:07:15,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:07:15,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-13 15:07:15,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:07:15,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-13 15:07:15,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1633, Unknown=1, NotChecked=82, Total=1892 [2022-12-13 15:07:15,894 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 222 [2022-12-13 15:07:15,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 704 places, 1656 transitions, 42172 flow. Second operand has 44 states, 44 states have (on average 62.47727272727273) internal successors, (2749), 44 states have internal predecessors, (2749), 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) [2022-12-13 15:07:15,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:07:15,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 222 [2022-12-13 15:07:15,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:07:23,429 INFO L130 PetriNetUnfolder]: 4345/8351 cut-off events. [2022-12-13 15:07:23,429 INFO L131 PetriNetUnfolder]: For 491730/491730 co-relation queries the response was YES. [2022-12-13 15:07:23,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102142 conditions, 8351 events. 4345/8351 cut-off events. For 491730/491730 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 67737 event pairs, 629 based on Foata normal form. 4/8355 useless extension candidates. Maximal degree in co-relation 101056. Up to 8124 conditions per place. [2022-12-13 15:07:23,570 INFO L137 encePairwiseOnDemand]: 214/222 looper letters, 1625 selfloop transitions, 103 changer transitions 8/1736 dead transitions. [2022-12-13 15:07:23,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 732 places, 1736 transitions, 47692 flow [2022-12-13 15:07:23,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 15:07:23,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-13 15:07:23,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1888 transitions. [2022-12-13 15:07:23,572 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2932587760173967 [2022-12-13 15:07:23,572 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1888 transitions. [2022-12-13 15:07:23,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1888 transitions. [2022-12-13 15:07:23,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:07:23,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1888 transitions. [2022-12-13 15:07:23,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 65.10344827586206) internal successors, (1888), 29 states have internal predecessors, (1888), 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) [2022-12-13 15:07:23,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 222.0) internal successors, (6660), 30 states have internal predecessors, (6660), 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) [2022-12-13 15:07:23,577 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 222.0) internal successors, (6660), 30 states have internal predecessors, (6660), 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) [2022-12-13 15:07:23,577 INFO L175 Difference]: Start difference. First operand has 704 places, 1656 transitions, 42172 flow. Second operand 29 states and 1888 transitions. [2022-12-13 15:07:23,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 732 places, 1736 transitions, 47692 flow [2022-12-13 15:07:29,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 718 places, 1736 transitions, 46625 flow, removed 387 selfloop flow, removed 14 redundant places. [2022-12-13 15:07:29,609 INFO L231 Difference]: Finished difference. Result has 721 places, 1684 transitions, 42763 flow [2022-12-13 15:07:29,610 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=41137, PETRI_DIFFERENCE_MINUEND_PLACES=690, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=42763, PETRI_PLACES=721, PETRI_TRANSITIONS=1684} [2022-12-13 15:07:29,610 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 700 predicate places. [2022-12-13 15:07:29,610 INFO L495 AbstractCegarLoop]: Abstraction has has 721 places, 1684 transitions, 42763 flow [2022-12-13 15:07:29,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 62.47727272727273) internal successors, (2749), 44 states have internal predecessors, (2749), 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) [2022-12-13 15:07:29,611 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:07:29,611 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:07:29,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-12-13 15:07:29,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-12-13 15:07:29,812 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:07:29,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:07:29,813 INFO L85 PathProgramCache]: Analyzing trace with hash 501659429, now seen corresponding path program 55 times [2022-12-13 15:07:29,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:07:29,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507924216] [2022-12-13 15:07:29,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:07:29,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:07:29,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:07:30,619 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:07:30,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:07:30,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507924216] [2022-12-13 15:07:30,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507924216] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:07:30,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140814587] [2022-12-13 15:07:30,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:07:30,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:07:30,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:07:30,620 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:07:30,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-12-13 15:07:30,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:07:30,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2022-12-13 15:07:30,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:07:30,955 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:07:30,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:07:31,135 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:07:31,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 131 [2022-12-13 15:07:31,316 INFO L321 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2022-12-13 15:07:31,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2022-12-13 15:07:31,382 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:07:31,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140814587] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:07:31,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:07:31,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2022-12-13 15:07:31,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099057001] [2022-12-13 15:07:31,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:07:31,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-13 15:07:31,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:07:31,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-13 15:07:31,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1022, Unknown=0, NotChecked=0, Total=1190 [2022-12-13 15:07:32,700 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 222 [2022-12-13 15:07:32,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 721 places, 1684 transitions, 42763 flow. Second operand has 35 states, 35 states have (on average 78.6) internal successors, (2751), 35 states have internal predecessors, (2751), 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) [2022-12-13 15:07:32,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:07:32,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 222 [2022-12-13 15:07:32,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:07:40,474 INFO L130 PetriNetUnfolder]: 4584/8834 cut-off events. [2022-12-13 15:07:40,474 INFO L131 PetriNetUnfolder]: For 548455/548455 co-relation queries the response was YES. [2022-12-13 15:07:40,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110571 conditions, 8834 events. 4584/8834 cut-off events. For 548455/548455 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 72355 event pairs, 567 based on Foata normal form. 6/8840 useless extension candidates. Maximal degree in co-relation 109992. Up to 8157 conditions per place. [2022-12-13 15:07:40,629 INFO L137 encePairwiseOnDemand]: 213/222 looper letters, 1634 selfloop transitions, 247 changer transitions 12/1893 dead transitions. [2022-12-13 15:07:40,629 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 756 places, 1893 transitions, 54491 flow [2022-12-13 15:07:40,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 15:07:40,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-12-13 15:07:40,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2941 transitions. [2022-12-13 15:07:40,632 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.367992992992993 [2022-12-13 15:07:40,633 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2941 transitions. [2022-12-13 15:07:40,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2941 transitions. [2022-12-13 15:07:40,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:07:40,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2941 transitions. [2022-12-13 15:07:40,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 81.69444444444444) internal successors, (2941), 36 states have internal predecessors, (2941), 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) [2022-12-13 15:07:40,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 222.0) internal successors, (8214), 37 states have internal predecessors, (8214), 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) [2022-12-13 15:07:40,639 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 222.0) internal successors, (8214), 37 states have internal predecessors, (8214), 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) [2022-12-13 15:07:40,639 INFO L175 Difference]: Start difference. First operand has 721 places, 1684 transitions, 42763 flow. Second operand 36 states and 2941 transitions. [2022-12-13 15:07:40,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 756 places, 1893 transitions, 54491 flow [2022-12-13 15:07:46,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 740 places, 1893 transitions, 53784 flow, removed 305 selfloop flow, removed 16 redundant places. [2022-12-13 15:07:46,802 INFO L231 Difference]: Finished difference. Result has 750 places, 1783 transitions, 48317 flow [2022-12-13 15:07:46,803 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=42072, PETRI_DIFFERENCE_MINUEND_PLACES=705, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=48317, PETRI_PLACES=750, PETRI_TRANSITIONS=1783} [2022-12-13 15:07:46,803 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 729 predicate places. [2022-12-13 15:07:46,803 INFO L495 AbstractCegarLoop]: Abstraction has has 750 places, 1783 transitions, 48317 flow [2022-12-13 15:07:46,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 78.6) internal successors, (2751), 35 states have internal predecessors, (2751), 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) [2022-12-13 15:07:46,803 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:07:46,803 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:07:46,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-12-13 15:07:47,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-12-13 15:07:47,004 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:07:47,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:07:47,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1220944591, now seen corresponding path program 56 times [2022-12-13 15:07:47,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:07:47,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249925123] [2022-12-13 15:07:47,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:07:47,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:07:47,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:07:47,925 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:07:47,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:07:47,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249925123] [2022-12-13 15:07:47,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249925123] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:07:47,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712795250] [2022-12-13 15:07:47,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:07:47,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:07:47,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:07:47,927 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:07:47,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-12-13 15:07:48,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:07:48,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:07:48,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2022-12-13 15:07:48,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:07:48,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:07:48,484 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:07:48,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 39 [2022-12-13 15:07:48,539 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:07:48,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:07:49,220 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:07:49,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 158 [2022-12-13 15:07:50,112 INFO L321 Elim1Store]: treesize reduction 68, result has 53.7 percent of original size [2022-12-13 15:07:50,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 89 [2022-12-13 15:07:50,585 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:07:50,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712795250] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:07:50,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:07:50,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2022-12-13 15:07:50,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420185995] [2022-12-13 15:07:50,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:07:50,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-13 15:07:50,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:07:50,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-13 15:07:50,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1616, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 15:07:55,044 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 222 [2022-12-13 15:07:55,045 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 750 places, 1783 transitions, 48317 flow. Second operand has 43 states, 43 states have (on average 77.4186046511628) internal successors, (3329), 43 states have internal predecessors, (3329), 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) [2022-12-13 15:07:55,045 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:07:55,046 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 222 [2022-12-13 15:07:55,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:08:05,633 INFO L130 PetriNetUnfolder]: 4630/8941 cut-off events. [2022-12-13 15:08:05,634 INFO L131 PetriNetUnfolder]: For 567958/567958 co-relation queries the response was YES. [2022-12-13 15:08:05,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112494 conditions, 8941 events. 4630/8941 cut-off events. For 567958/567958 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 73784 event pairs, 320 based on Foata normal form. 5/8946 useless extension candidates. Maximal degree in co-relation 111672. Up to 6137 conditions per place. [2022-12-13 15:08:05,766 INFO L137 encePairwiseOnDemand]: 211/222 looper letters, 1482 selfloop transitions, 384 changer transitions 10/1876 dead transitions. [2022-12-13 15:08:05,767 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 792 places, 1876 transitions, 53785 flow [2022-12-13 15:08:05,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-13 15:08:05,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-12-13 15:08:05,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 3433 transitions. [2022-12-13 15:08:05,770 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3596270689293945 [2022-12-13 15:08:05,770 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 3433 transitions. [2022-12-13 15:08:05,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 3433 transitions. [2022-12-13 15:08:05,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:08:05,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 3433 transitions. [2022-12-13 15:08:05,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 79.83720930232558) internal successors, (3433), 43 states have internal predecessors, (3433), 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) [2022-12-13 15:08:05,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 222.0) internal successors, (9768), 44 states have internal predecessors, (9768), 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) [2022-12-13 15:08:05,781 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 222.0) internal successors, (9768), 44 states have internal predecessors, (9768), 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) [2022-12-13 15:08:05,781 INFO L175 Difference]: Start difference. First operand has 750 places, 1783 transitions, 48317 flow. Second operand 43 states and 3433 transitions. [2022-12-13 15:08:05,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 792 places, 1876 transitions, 53785 flow [2022-12-13 15:08:12,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 777 places, 1876 transitions, 51028 flow, removed 1335 selfloop flow, removed 15 redundant places. [2022-12-13 15:08:13,011 INFO L231 Difference]: Finished difference. Result has 784 places, 1806 transitions, 47382 flow [2022-12-13 15:08:13,013 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=45574, PETRI_DIFFERENCE_MINUEND_PLACES=735, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=47382, PETRI_PLACES=784, PETRI_TRANSITIONS=1806} [2022-12-13 15:08:13,014 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 763 predicate places. [2022-12-13 15:08:13,014 INFO L495 AbstractCegarLoop]: Abstraction has has 784 places, 1806 transitions, 47382 flow [2022-12-13 15:08:13,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 77.4186046511628) internal successors, (3329), 43 states have internal predecessors, (3329), 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) [2022-12-13 15:08:13,014 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:08:13,014 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:08:13,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-12-13 15:08:13,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:08:13,215 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:08:13,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:08:13,216 INFO L85 PathProgramCache]: Analyzing trace with hash 57377629, now seen corresponding path program 57 times [2022-12-13 15:08:13,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:08:13,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003800944] [2022-12-13 15:08:13,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:13,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:08:13,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:14,000 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:08:14,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:08:14,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003800944] [2022-12-13 15:08:14,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003800944] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:08:14,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710372424] [2022-12-13 15:08:14,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:08:14,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:08:14,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:08:14,002 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:08:14,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-12-13 15:08:14,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 15:08:14,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:08:14,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 121 conjunts are in the unsatisfiable core [2022-12-13 15:08:14,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:08:14,179 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 15 treesize of output 11 [2022-12-13 15:08:14,216 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 6 treesize of output 5 [2022-12-13 15:08:14,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:08:14,290 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 19 treesize of output 21 [2022-12-13 15:08:14,479 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:08:14,479 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 17 treesize of output 18 [2022-12-13 15:08:14,573 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:08:14,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:08:17,725 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset 4)) (.cse1 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (and (forall ((v_ArrVal_2170 (Array Int Int)) (v_subst_24 Int)) (or (< (+ v_subst_24 1) c_~N~0) (forall ((v_subst_21 Int)) (or (< (+ v_subst_21 1) c_~N~0) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2170) c_~A~0.base))) (<= (+ (select .cse0 (+ c_~A~0.offset (* v_subst_24 4))) c_~counter~0 (select .cse0 .cse1)) (+ (select .cse0 (+ (* v_subst_21 4) c_~A~0.offset)) (select .cse0 c_~A~0.offset) (select .cse0 .cse2)))) (not (< v_subst_21 c_~N~0)))) (not (< v_subst_24 c_~N~0)))) (forall ((v_ArrVal_2170 (Array Int Int)) (v_subst_23 Int)) (or (forall ((v_subst_22 Int)) (or (< (+ v_subst_22 1) c_~N~0) (not (< v_subst_22 c_~N~0)) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2170) c_~A~0.base))) (< (+ (select .cse3 c_~A~0.offset) (select .cse3 (+ c_~A~0.offset (* v_subst_22 4))) (select .cse3 .cse2)) (+ c_~counter~0 (select .cse3 (+ c_~A~0.offset (* v_subst_23 4))) (select .cse3 .cse1) 1))))) (< (+ v_subst_23 1) c_~N~0) (not (< v_subst_23 c_~N~0)))))) is different from false [2022-12-13 15:08:19,766 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse5 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse3 (+ c_~A~0.offset 4)) (.cse0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse5))) (.cse2 (+ c_~A~0.offset .cse5 4))) (and (forall ((v_ArrVal_2170 (Array Int Int)) (v_subst_24 Int)) (or (forall ((v_subst_21 Int)) (or (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2170) c_~A~0.base))) (<= (+ .cse0 (select .cse1 .cse2) (select .cse1 (+ c_~A~0.offset (* v_subst_24 4))) c_~counter~0) (+ (select .cse1 (+ (* v_subst_21 4) c_~A~0.offset)) (select .cse1 c_~A~0.offset) (select .cse1 .cse3)))) (< (+ v_subst_21 1) c_~N~0) (not (< v_subst_21 c_~N~0)))) (< (+ v_subst_24 1) c_~N~0) (not (< v_subst_24 c_~N~0)))) (forall ((v_ArrVal_2170 (Array Int Int)) (v_subst_23 Int)) (or (forall ((v_subst_22 Int)) (or (< (+ v_subst_22 1) c_~N~0) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2170) c_~A~0.base))) (< (+ (select .cse4 c_~A~0.offset) (select .cse4 (+ c_~A~0.offset (* v_subst_22 4))) (select .cse4 .cse3)) (+ .cse0 (select .cse4 .cse2) c_~counter~0 (select .cse4 (+ c_~A~0.offset (* v_subst_23 4))) 1))) (not (< v_subst_22 c_~N~0)))) (< (+ v_subst_23 1) c_~N~0) (not (< v_subst_23 c_~N~0))))))) is different from false [2022-12-13 15:08:21,808 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset))) (and (forall ((v_ArrVal_2170 (Array Int Int)) (v_subst_24 Int)) (or (< (+ v_subst_24 1) c_~N~0) (forall ((v_subst_21 Int)) (or (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2170) c_~A~0.base))) (<= (+ .cse0 (select .cse1 (+ c_~A~0.offset (* v_subst_24 4))) c_~counter~0) (+ (select .cse1 (+ (* v_subst_21 4) c_~A~0.offset)) (select .cse1 c_~A~0.offset)))) (< (+ v_subst_21 1) c_~N~0) (not (< v_subst_21 c_~N~0)))) (not (< v_subst_24 c_~N~0)))) (forall ((v_ArrVal_2170 (Array Int Int)) (v_subst_23 Int)) (or (< (+ v_subst_23 1) c_~N~0) (forall ((v_subst_22 Int)) (or (< (+ v_subst_22 1) c_~N~0) (not (< v_subst_22 c_~N~0)) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2170) c_~A~0.base))) (< (+ (select .cse2 c_~A~0.offset) (select .cse2 (+ c_~A~0.offset (* v_subst_22 4)))) (+ .cse0 c_~counter~0 (select .cse2 (+ c_~A~0.offset (* v_subst_23 4))) 1))))) (not (< v_subst_23 c_~N~0)))))) is different from false [2022-12-13 15:08:28,035 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:08:28,064 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:08:28,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 242 treesize of output 180 [2022-12-13 15:08:28,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 366 treesize of output 340 [2022-12-13 15:08:28,096 INFO L321 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2022-12-13 15:08:28,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 248 treesize of output 206 [2022-12-13 15:08:28,122 INFO L321 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2022-12-13 15:08:28,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 180 treesize of output 162 [2022-12-13 15:08:28,147 INFO L321 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2022-12-13 15:08:28,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 143 treesize of output 125 [2022-12-13 15:08:28,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:08:28,213 INFO L321 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2022-12-13 15:08:28,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 102 [2022-12-13 15:08:28,230 INFO L321 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2022-12-13 15:08:28,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 70 [2022-12-13 15:08:28,304 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2022-12-13 15:08:28,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710372424] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:08:28,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:08:28,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 42 [2022-12-13 15:08:28,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144213647] [2022-12-13 15:08:28,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:08:28,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-13 15:08:28,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:08:28,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-13 15:08:28,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1468, Unknown=3, NotChecked=240, Total=1892 [2022-12-13 15:08:28,619 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 222 [2022-12-13 15:08:28,620 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 784 places, 1806 transitions, 47382 flow. Second operand has 44 states, 44 states have (on average 62.45454545454545) internal successors, (2748), 44 states have internal predecessors, (2748), 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) [2022-12-13 15:08:28,620 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:08:28,620 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 222 [2022-12-13 15:08:28,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:08:43,929 INFO L130 PetriNetUnfolder]: 4801/9246 cut-off events. [2022-12-13 15:08:43,929 INFO L131 PetriNetUnfolder]: For 600316/600316 co-relation queries the response was YES. [2022-12-13 15:08:44,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117168 conditions, 9246 events. 4801/9246 cut-off events. For 600316/600316 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 76424 event pairs, 564 based on Foata normal form. 3/9249 useless extension candidates. Maximal degree in co-relation 116325. Up to 7715 conditions per place. [2022-12-13 15:08:44,065 INFO L137 encePairwiseOnDemand]: 211/222 looper letters, 1323 selfloop transitions, 615 changer transitions 11/1949 dead transitions. [2022-12-13 15:08:44,065 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 822 places, 1949 transitions, 55536 flow [2022-12-13 15:08:44,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-13 15:08:44,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-12-13 15:08:44,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2604 transitions. [2022-12-13 15:08:44,067 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.29324324324324325 [2022-12-13 15:08:44,067 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2604 transitions. [2022-12-13 15:08:44,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2604 transitions. [2022-12-13 15:08:44,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:08:44,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2604 transitions. [2022-12-13 15:08:44,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 65.1) internal successors, (2604), 40 states have internal predecessors, (2604), 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) [2022-12-13 15:08:44,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 222.0) internal successors, (9102), 41 states have internal predecessors, (9102), 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) [2022-12-13 15:08:44,073 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 222.0) internal successors, (9102), 41 states have internal predecessors, (9102), 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) [2022-12-13 15:08:44,073 INFO L175 Difference]: Start difference. First operand has 784 places, 1806 transitions, 47382 flow. Second operand 40 states and 2604 transitions. [2022-12-13 15:08:44,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 822 places, 1949 transitions, 55536 flow [2022-12-13 15:08:51,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 798 places, 1949 transitions, 54969 flow, removed 224 selfloop flow, removed 24 redundant places. [2022-12-13 15:08:51,753 INFO L231 Difference]: Finished difference. Result has 809 places, 1878 transitions, 51946 flow [2022-12-13 15:08:51,754 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=46817, PETRI_DIFFERENCE_MINUEND_PLACES=759, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1806, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=556, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=51946, PETRI_PLACES=809, PETRI_TRANSITIONS=1878} [2022-12-13 15:08:51,754 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 788 predicate places. [2022-12-13 15:08:51,754 INFO L495 AbstractCegarLoop]: Abstraction has has 809 places, 1878 transitions, 51946 flow [2022-12-13 15:08:51,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 62.45454545454545) internal successors, (2748), 44 states have internal predecessors, (2748), 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) [2022-12-13 15:08:51,754 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:08:51,754 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:08:51,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-12-13 15:08:51,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:08:51,956 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:08:51,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:08:51,957 INFO L85 PathProgramCache]: Analyzing trace with hash -492498331, now seen corresponding path program 58 times [2022-12-13 15:08:51,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:08:51,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548181251] [2022-12-13 15:08:51,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:08:51,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:08:52,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:08:52,842 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:08:52,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:08:52,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548181251] [2022-12-13 15:08:52,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548181251] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:08:52,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199559598] [2022-12-13 15:08:52,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:08:52,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:08:52,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:08:52,843 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:08:52,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-12-13 15:08:52,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:08:52,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:08:52,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2022-12-13 15:08:52,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:08:53,246 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:08:53,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:08:53,462 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:08:53,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 131 [2022-12-13 15:08:53,627 INFO L321 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2022-12-13 15:08:53,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2022-12-13 15:08:53,694 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:08:53,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199559598] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:08:53,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:08:53,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 30 [2022-12-13 15:08:53,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920901314] [2022-12-13 15:08:53,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:08:53,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 15:08:53,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:08:53,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 15:08:53,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2022-12-13 15:08:55,525 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 222 [2022-12-13 15:08:55,526 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 809 places, 1878 transitions, 51946 flow. Second operand has 32 states, 32 states have (on average 78.8125) internal successors, (2522), 32 states have internal predecessors, (2522), 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) [2022-12-13 15:08:55,526 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:08:55,526 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 222 [2022-12-13 15:08:55,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:09:04,235 INFO L130 PetriNetUnfolder]: 4937/9511 cut-off events. [2022-12-13 15:09:04,235 INFO L131 PetriNetUnfolder]: For 697141/697141 co-relation queries the response was YES. [2022-12-13 15:09:04,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125908 conditions, 9511 events. 4937/9511 cut-off events. For 697141/697141 co-relation queries the response was YES. Maximal size of possible extension queue 738. Compared 79218 event pairs, 709 based on Foata normal form. 6/9517 useless extension candidates. Maximal degree in co-relation 124774. Up to 9147 conditions per place. [2022-12-13 15:09:04,374 INFO L137 encePairwiseOnDemand]: 214/222 looper letters, 1868 selfloop transitions, 103 changer transitions 10/1981 dead transitions. [2022-12-13 15:09:04,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 830 places, 1981 transitions, 59757 flow [2022-12-13 15:09:04,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 15:09:04,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-13 15:09:04,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1882 transitions. [2022-12-13 15:09:04,376 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36858597728162945 [2022-12-13 15:09:04,376 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1882 transitions. [2022-12-13 15:09:04,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1882 transitions. [2022-12-13 15:09:04,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:09:04,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1882 transitions. [2022-12-13 15:09:04,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 81.82608695652173) internal successors, (1882), 23 states have internal predecessors, (1882), 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) [2022-12-13 15:09:04,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 222.0) internal successors, (5328), 24 states have internal predecessors, (5328), 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) [2022-12-13 15:09:04,380 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 222.0) internal successors, (5328), 24 states have internal predecessors, (5328), 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) [2022-12-13 15:09:04,380 INFO L175 Difference]: Start difference. First operand has 809 places, 1878 transitions, 51946 flow. Second operand 23 states and 1882 transitions. [2022-12-13 15:09:04,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 830 places, 1981 transitions, 59757 flow [2022-12-13 15:09:13,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 811 places, 1981 transitions, 56889 flow, removed 1312 selfloop flow, removed 19 redundant places. [2022-12-13 15:09:13,379 INFO L231 Difference]: Finished difference. Result has 816 places, 1916 transitions, 51958 flow [2022-12-13 15:09:13,380 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=49080, PETRI_DIFFERENCE_MINUEND_PLACES=789, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1878, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1799, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=51958, PETRI_PLACES=816, PETRI_TRANSITIONS=1916} [2022-12-13 15:09:13,380 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 795 predicate places. [2022-12-13 15:09:13,380 INFO L495 AbstractCegarLoop]: Abstraction has has 816 places, 1916 transitions, 51958 flow [2022-12-13 15:09:13,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 78.8125) internal successors, (2522), 32 states have internal predecessors, (2522), 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) [2022-12-13 15:09:13,380 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:09:13,380 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:09:13,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-12-13 15:09:13,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-12-13 15:09:13,581 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:09:13,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:09:13,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1862882807, now seen corresponding path program 59 times [2022-12-13 15:09:13,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:09:13,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906771444] [2022-12-13 15:09:13,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:09:13,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:09:13,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:09:14,282 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:09:14,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:09:14,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906771444] [2022-12-13 15:09:14,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906771444] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:09:14,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853026900] [2022-12-13 15:09:14,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:09:14,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:09:14,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:09:14,284 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:09:14,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-12-13 15:09:14,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 15:09:14,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:09:14,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 114 conjunts are in the unsatisfiable core [2022-12-13 15:09:14,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:09:14,493 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 [2022-12-13 15:09:14,527 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 6 treesize of output 5 [2022-12-13 15:09:14,551 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 6 treesize of output 5 [2022-12-13 15:09:14,771 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:09:14,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:09:15,092 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:09:15,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853026900] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:09:15,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:09:15,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 8] total 34 [2022-12-13 15:09:15,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710008768] [2022-12-13 15:09:15,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:09:15,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 15:09:15,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:09:15,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 15:09:15,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 15:09:17,982 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 222 [2022-12-13 15:09:17,983 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 816 places, 1916 transitions, 51958 flow. Second operand has 36 states, 36 states have (on average 78.55555555555556) internal successors, (2828), 36 states have internal predecessors, (2828), 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) [2022-12-13 15:09:17,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:09:17,983 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 222 [2022-12-13 15:09:17,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:09:27,792 INFO L130 PetriNetUnfolder]: 5133/9911 cut-off events. [2022-12-13 15:09:27,792 INFO L131 PetriNetUnfolder]: For 736473/736473 co-relation queries the response was YES. [2022-12-13 15:09:27,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131074 conditions, 9911 events. 5133/9911 cut-off events. For 736473/736473 co-relation queries the response was YES. Maximal size of possible extension queue 770. Compared 83401 event pairs, 748 based on Foata normal form. 6/9917 useless extension candidates. Maximal degree in co-relation 129929. Up to 9179 conditions per place. [2022-12-13 15:09:27,945 INFO L137 encePairwiseOnDemand]: 214/222 looper letters, 1793 selfloop transitions, 272 changer transitions 10/2075 dead transitions. [2022-12-13 15:09:27,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 848 places, 2075 transitions, 62520 flow [2022-12-13 15:09:27,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 15:09:27,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-12-13 15:09:27,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2698 transitions. [2022-12-13 15:09:27,948 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3682773682773683 [2022-12-13 15:09:27,948 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2698 transitions. [2022-12-13 15:09:27,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2698 transitions. [2022-12-13 15:09:27,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:09:27,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2698 transitions. [2022-12-13 15:09:27,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 81.75757575757575) internal successors, (2698), 33 states have internal predecessors, (2698), 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) [2022-12-13 15:09:27,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 222.0) internal successors, (7548), 34 states have internal predecessors, (7548), 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) [2022-12-13 15:09:27,953 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 222.0) internal successors, (7548), 34 states have internal predecessors, (7548), 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) [2022-12-13 15:09:27,953 INFO L175 Difference]: Start difference. First operand has 816 places, 1916 transitions, 51958 flow. Second operand 33 states and 2698 transitions. [2022-12-13 15:09:27,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 848 places, 2075 transitions, 62520 flow [2022-12-13 15:09:37,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 836 places, 2075 transitions, 60563 flow, removed 933 selfloop flow, removed 12 redundant places. [2022-12-13 15:09:37,092 INFO L231 Difference]: Finished difference. Result has 843 places, 1976 transitions, 54741 flow [2022-12-13 15:09:37,093 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=50001, PETRI_DIFFERENCE_MINUEND_PLACES=804, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1916, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1675, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=54741, PETRI_PLACES=843, PETRI_TRANSITIONS=1976} [2022-12-13 15:09:37,093 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 822 predicate places. [2022-12-13 15:09:37,093 INFO L495 AbstractCegarLoop]: Abstraction has has 843 places, 1976 transitions, 54741 flow [2022-12-13 15:09:37,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 78.55555555555556) internal successors, (2828), 36 states have internal predecessors, (2828), 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) [2022-12-13 15:09:37,094 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:09:37,094 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:09:37,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-12-13 15:09:37,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:09:37,295 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:09:37,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:09:37,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1514134299, now seen corresponding path program 60 times [2022-12-13 15:09:37,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:09:37,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859041355] [2022-12-13 15:09:37,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:09:37,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:09:37,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:09:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:09:38,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:09:38,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859041355] [2022-12-13 15:09:38,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859041355] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:09:38,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736790463] [2022-12-13 15:09:38,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:09:38,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:09:38,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:09:38,102 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:09:38,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-12-13 15:09:38,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 15:09:38,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:09:38,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 107 conjunts are in the unsatisfiable core [2022-12-13 15:09:38,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:09:38,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:09:38,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:09:38,728 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:09:38,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 15 [2022-12-13 15:09:38,745 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:09:38,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:09:39,036 INFO L321 Elim1Store]: treesize reduction 26, result has 82.3 percent of original size [2022-12-13 15:09:39,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 124 treesize of output 143 [2022-12-13 15:09:39,792 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:09:39,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736790463] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:09:39,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:09:39,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 39 [2022-12-13 15:09:39,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659051319] [2022-12-13 15:09:39,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:09:39,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-13 15:09:39,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:09:39,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-13 15:09:39,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1435, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 15:09:42,269 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 222 [2022-12-13 15:09:42,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 843 places, 1976 transitions, 54741 flow. Second operand has 41 states, 41 states have (on average 78.41463414634147) internal successors, (3215), 41 states have internal predecessors, (3215), 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) [2022-12-13 15:09:42,270 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:09:42,270 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 222 [2022-12-13 15:09:42,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:09:55,093 INFO L130 PetriNetUnfolder]: 5569/10734 cut-off events. [2022-12-13 15:09:55,093 INFO L131 PetriNetUnfolder]: For 878299/878299 co-relation queries the response was YES. [2022-12-13 15:09:55,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147281 conditions, 10734 events. 5569/10734 cut-off events. For 878299/878299 co-relation queries the response was YES. Maximal size of possible extension queue 857. Compared 91589 event pairs, 271 based on Foata normal form. 7/10741 useless extension candidates. Maximal degree in co-relation 146122. Up to 4067 conditions per place. [2022-12-13 15:09:55,263 INFO L137 encePairwiseOnDemand]: 211/222 looper letters, 1316 selfloop transitions, 936 changer transitions 21/2273 dead transitions. [2022-12-13 15:09:55,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 897 places, 2273 transitions, 71748 flow [2022-12-13 15:09:55,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-13 15:09:55,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-12-13 15:09:55,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 4477 transitions. [2022-12-13 15:09:55,267 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2022-12-13 15:09:55,267 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 4477 transitions. [2022-12-13 15:09:55,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 4477 transitions. [2022-12-13 15:09:55,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:09:55,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 4477 transitions. [2022-12-13 15:09:55,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 81.4) internal successors, (4477), 55 states have internal predecessors, (4477), 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) [2022-12-13 15:09:55,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 222.0) internal successors, (12432), 56 states have internal predecessors, (12432), 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) [2022-12-13 15:09:55,275 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 222.0) internal successors, (12432), 56 states have internal predecessors, (12432), 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) [2022-12-13 15:09:55,275 INFO L175 Difference]: Start difference. First operand has 843 places, 1976 transitions, 54741 flow. Second operand 55 states and 4477 transitions. [2022-12-13 15:09:55,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 897 places, 2273 transitions, 71748 flow [2022-12-13 15:10:07,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 879 places, 2273 transitions, 67529 flow, removed 2046 selfloop flow, removed 18 redundant places. [2022-12-13 15:10:07,797 INFO L231 Difference]: Finished difference. Result has 894 places, 2132 transitions, 63209 flow [2022-12-13 15:10:07,798 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=52158, PETRI_DIFFERENCE_MINUEND_PLACES=825, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1976, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=796, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=63209, PETRI_PLACES=894, PETRI_TRANSITIONS=2132} [2022-12-13 15:10:07,798 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 873 predicate places. [2022-12-13 15:10:07,798 INFO L495 AbstractCegarLoop]: Abstraction has has 894 places, 2132 transitions, 63209 flow [2022-12-13 15:10:07,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 78.41463414634147) internal successors, (3215), 41 states have internal predecessors, (3215), 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) [2022-12-13 15:10:07,799 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:10:07,799 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:10:07,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-12-13 15:10:07,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:10:08,000 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:10:08,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:10:08,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1169516901, now seen corresponding path program 61 times [2022-12-13 15:10:08,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:10:08,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257535903] [2022-12-13 15:10:08,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:10:08,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:10:08,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:10:08,816 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:10:08,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:10:08,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257535903] [2022-12-13 15:10:08,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257535903] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:10:08,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500205420] [2022-12-13 15:10:08,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:10:08,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:10:08,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:10:08,817 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:10:08,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-12-13 15:10:08,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:10:08,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2022-12-13 15:10:08,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:10:09,227 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:10:09,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:10:09,452 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:10:09,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 131 [2022-12-13 15:10:09,681 INFO L321 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2022-12-13 15:10:09,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2022-12-13 15:10:09,759 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:10:09,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500205420] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:10:09,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:10:09,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2022-12-13 15:10:09,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572738409] [2022-12-13 15:10:09,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:10:09,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-13 15:10:09,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:10:09,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-13 15:10:09,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2022-12-13 15:10:11,806 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 222 [2022-12-13 15:10:11,808 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 894 places, 2132 transitions, 63209 flow. Second operand has 35 states, 35 states have (on average 77.6) internal successors, (2716), 35 states have internal predecessors, (2716), 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) [2022-12-13 15:10:11,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:10:11,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 222 [2022-12-13 15:10:11,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:10:24,204 INFO L130 PetriNetUnfolder]: 5759/11078 cut-off events. [2022-12-13 15:10:24,205 INFO L131 PetriNetUnfolder]: For 1003018/1003018 co-relation queries the response was YES. [2022-12-13 15:10:24,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157781 conditions, 11078 events. 5759/11078 cut-off events. For 1003018/1003018 co-relation queries the response was YES. Maximal size of possible extension queue 884. Compared 94882 event pairs, 765 based on Foata normal form. 6/11084 useless extension candidates. Maximal degree in co-relation 156854. Up to 10356 conditions per place. [2022-12-13 15:10:24,394 INFO L137 encePairwiseOnDemand]: 212/222 looper letters, 2042 selfloop transitions, 248 changer transitions 12/2302 dead transitions. [2022-12-13 15:10:24,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 927 places, 2302 transitions, 76141 flow [2022-12-13 15:10:24,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 15:10:24,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-13 15:10:24,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2744 transitions. [2022-12-13 15:10:24,397 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3635400105988341 [2022-12-13 15:10:24,397 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2744 transitions. [2022-12-13 15:10:24,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2744 transitions. [2022-12-13 15:10:24,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:10:24,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2744 transitions. [2022-12-13 15:10:24,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 80.70588235294117) internal successors, (2744), 34 states have internal predecessors, (2744), 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) [2022-12-13 15:10:24,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 222.0) internal successors, (7770), 35 states have internal predecessors, (7770), 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) [2022-12-13 15:10:24,402 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 222.0) internal successors, (7770), 35 states have internal predecessors, (7770), 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) [2022-12-13 15:10:24,402 INFO L175 Difference]: Start difference. First operand has 894 places, 2132 transitions, 63209 flow. Second operand 34 states and 2744 transitions. [2022-12-13 15:10:24,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 927 places, 2302 transitions, 76141 flow [2022-12-13 15:10:39,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 898 places, 2302 transitions, 70334 flow, removed 2809 selfloop flow, removed 29 redundant places. [2022-12-13 15:10:39,411 INFO L231 Difference]: Finished difference. Result has 904 places, 2195 transitions, 63915 flow [2022-12-13 15:10:39,412 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=58980, PETRI_DIFFERENCE_MINUEND_PLACES=865, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1921, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=63915, PETRI_PLACES=904, PETRI_TRANSITIONS=2195} [2022-12-13 15:10:39,413 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 883 predicate places. [2022-12-13 15:10:39,413 INFO L495 AbstractCegarLoop]: Abstraction has has 904 places, 2195 transitions, 63915 flow [2022-12-13 15:10:39,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 77.6) internal successors, (2716), 35 states have internal predecessors, (2716), 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) [2022-12-13 15:10:39,413 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:10:39,413 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:10:39,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-12-13 15:10:39,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:10:39,614 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:10:39,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:10:39,615 INFO L85 PathProgramCache]: Analyzing trace with hash -168739523, now seen corresponding path program 62 times [2022-12-13 15:10:39,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:10:39,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436685318] [2022-12-13 15:10:39,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:10:39,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:10:39,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:10:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:10:40,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:10:40,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436685318] [2022-12-13 15:10:40,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436685318] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:10:40,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677181405] [2022-12-13 15:10:40,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:10:40,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:10:40,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:10:40,455 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:10:40,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-12-13 15:10:40,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:10:40,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:10:40,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2022-12-13 15:10:40,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:10:40,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:10:40,974 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:10:40,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 39 [2022-12-13 15:10:41,029 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:10:41,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:10:41,890 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:10:41,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 148 [2022-12-13 15:10:42,536 INFO L321 Elim1Store]: treesize reduction 62, result has 54.7 percent of original size [2022-12-13 15:10:42,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 85 [2022-12-13 15:10:42,975 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:10:42,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677181405] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:10:42,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:10:42,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2022-12-13 15:10:42,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86042017] [2022-12-13 15:10:42,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:10:42,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-13 15:10:42,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:10:42,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-13 15:10:42,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1623, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 15:10:47,198 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 222 [2022-12-13 15:10:47,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 904 places, 2195 transitions, 63915 flow. Second operand has 43 states, 43 states have (on average 77.4186046511628) internal successors, (3329), 43 states have internal predecessors, (3329), 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) [2022-12-13 15:10:47,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:10:47,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 222 [2022-12-13 15:10:47,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:11:00,516 INFO L130 PetriNetUnfolder]: 5871/11310 cut-off events. [2022-12-13 15:11:00,516 INFO L131 PetriNetUnfolder]: For 964669/964669 co-relation queries the response was YES. [2022-12-13 15:11:00,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155438 conditions, 11310 events. 5871/11310 cut-off events. For 964669/964669 co-relation queries the response was YES. Maximal size of possible extension queue 903. Compared 97410 event pairs, 276 based on Foata normal form. 6/11316 useless extension candidates. Maximal degree in co-relation 154758. Up to 7724 conditions per place. [2022-12-13 15:11:00,718 INFO L137 encePairwiseOnDemand]: 211/222 looper letters, 1754 selfloop transitions, 562 changer transitions 10/2326 dead transitions. [2022-12-13 15:11:00,718 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 947 places, 2326 transitions, 72100 flow [2022-12-13 15:11:00,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-13 15:11:00,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-12-13 15:11:00,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3518 transitions. [2022-12-13 15:11:00,722 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36015561015561015 [2022-12-13 15:11:00,722 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3518 transitions. [2022-12-13 15:11:00,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3518 transitions. [2022-12-13 15:11:00,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:11:00,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3518 transitions. [2022-12-13 15:11:00,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 79.95454545454545) internal successors, (3518), 44 states have internal predecessors, (3518), 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) [2022-12-13 15:11:00,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 222.0) internal successors, (9990), 45 states have internal predecessors, (9990), 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) [2022-12-13 15:11:00,730 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 222.0) internal successors, (9990), 45 states have internal predecessors, (9990), 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) [2022-12-13 15:11:00,730 INFO L175 Difference]: Start difference. First operand has 904 places, 2195 transitions, 63915 flow. Second operand 44 states and 3518 transitions. [2022-12-13 15:11:00,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 947 places, 2326 transitions, 72100 flow [2022-12-13 15:11:15,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 927 places, 2326 transitions, 69233 flow, removed 1358 selfloop flow, removed 20 redundant places. [2022-12-13 15:11:15,795 INFO L231 Difference]: Finished difference. Result has 932 places, 2250 transitions, 64747 flow [2022-12-13 15:11:15,796 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=61052, PETRI_DIFFERENCE_MINUEND_PLACES=884, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=521, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1666, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=64747, PETRI_PLACES=932, PETRI_TRANSITIONS=2250} [2022-12-13 15:11:15,796 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 911 predicate places. [2022-12-13 15:11:15,796 INFO L495 AbstractCegarLoop]: Abstraction has has 932 places, 2250 transitions, 64747 flow [2022-12-13 15:11:15,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 77.4186046511628) internal successors, (3329), 43 states have internal predecessors, (3329), 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) [2022-12-13 15:11:15,797 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:11:15,797 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:11:15,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-12-13 15:11:15,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:11:15,998 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 15:11:15,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:11:15,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1440612571, now seen corresponding path program 63 times [2022-12-13 15:11:16,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:11:16,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416991848] [2022-12-13 15:11:16,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:11:16,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:11:16,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:11:16,959 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:11:16,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:11:16,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416991848] [2022-12-13 15:11:16,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416991848] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:11:16,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709811551] [2022-12-13 15:11:16,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:11:16,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:11:16,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:11:16,960 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:11:16,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930ba681-46ff-46fe-bea8-366c17f6f302/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-12-13 15:11:17,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 15:11:17,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:11:17,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 121 conjunts are in the unsatisfiable core [2022-12-13 15:11:17,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:11:17,334 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 15 treesize of output 11 [2022-12-13 15:11:17,376 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 6 treesize of output 5 [2022-12-13 15:11:17,400 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 6 treesize of output 5 [2022-12-13 15:11:17,674 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:11:17,675 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 17 treesize of output 18 [2022-12-13 15:11:17,753 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:11:17,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:11:23,341 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:11:23,342 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 57 treesize of output 46 [2022-12-13 15:11:23,351 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:11:23,352 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 214 treesize of output 194 [2022-12-13 15:11:23,362 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:11:23,363 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 182 treesize of output 146 [2022-12-13 15:11:23,373 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:11:23,374 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 134 treesize of output 122 [2022-12-13 15:11:23,532 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:11:23,532 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 58 treesize of output 47 [2022-12-13 15:11:23,542 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-12-13 15:11:23,543 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 106 treesize of output 94 [2022-12-13 15:11:23,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:11:23,550 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 37 [2022-12-13 15:11:23,559 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-12-13 15:11:23,559 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 76 treesize of output 56 [2022-12-13 15:11:29,785 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:11:29,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709811551] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:11:29,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:11:29,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2022-12-13 15:11:29,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995825262] [2022-12-13 15:11:29,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:11:29,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-13 15:11:29,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:11:29,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-13 15:11:29,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1680, Unknown=4, NotChecked=0, Total=1892 [2022-12-13 15:11:32,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:11:35,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:11:38,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:11:42,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:11:44,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:11:47,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:11:49,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:11:52,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:11:54,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:11:56,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:11:58,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:12:01,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:12:04,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:12:04,078 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 222 [2022-12-13 15:12:04,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 932 places, 2250 transitions, 64747 flow. Second operand has 44 states, 44 states have (on average 62.31818181818182) internal successors, (2742), 44 states have internal predecessors, (2742), 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) [2022-12-13 15:12:04,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:12:04,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 222 [2022-12-13 15:12:04,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:12:10,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:12:12,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:12:14,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:12:16,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:12:25,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:12:27,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:12:29,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:13:06,480 WARN L233 SmtUtils]: Spent 16.53s on a formula simplification. DAG size of input: 145 DAG size of output: 98 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:13:11,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:13:32,834 WARN L233 SmtUtils]: Spent 19.53s on a formula simplification. DAG size of input: 183 DAG size of output: 128 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:13:39,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:13:41,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:13:43,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:13:45,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:13:47,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 15:13:49,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:13:51,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:13:53,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:14:19,085 WARN L233 SmtUtils]: Spent 24.46s on a formula simplification. DAG size of input: 173 DAG size of output: 111 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:14:22,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:14:24,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:14:26,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:14:28,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:14:30,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:14:32,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:14:35,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:14:37,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 15:14:39,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:14:41,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:14:43,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:14:45,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:14:47,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:14:49,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:14:51,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:14:56,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:14:58,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:15:00,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:15:02,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:15:04,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:15:06,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:15:08,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:15:10,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 15:15:12,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:15:14,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:15:16,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:15:18,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:15:20,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:15:22,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:15:24,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:15:26,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:15:28,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:15:30,723 INFO L130 PetriNetUnfolder]: 6493/12416 cut-off events. [2022-12-13 15:15:30,723 INFO L131 PetriNetUnfolder]: For 1118229/1118229 co-relation queries the response was YES. [2022-12-13 15:15:30,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175316 conditions, 12416 events. 6493/12416 cut-off events. For 1118229/1118229 co-relation queries the response was YES. Maximal size of possible extension queue 992. Compared 107733 event pairs, 368 based on Foata normal form. 11/12427 useless extension candidates. Maximal degree in co-relation 174514. Up to 6649 conditions per place. [2022-12-13 15:15:31,012 INFO L137 encePairwiseOnDemand]: 211/222 looper letters, 1671 selfloop transitions, 911 changer transitions 40/2622 dead transitions. [2022-12-13 15:15:31,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1002 places, 2622 transitions, 82421 flow [2022-12-13 15:15:31,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-12-13 15:15:31,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-12-13 15:15:31,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 4699 transitions. [2022-12-13 15:15:31,016 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.29398148148148145 [2022-12-13 15:15:31,017 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 4699 transitions. [2022-12-13 15:15:31,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 4699 transitions. [2022-12-13 15:15:31,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:15:31,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 4699 transitions. [2022-12-13 15:15:31,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 65.26388888888889) internal successors, (4699), 72 states have internal predecessors, (4699), 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) [2022-12-13 15:15:31,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 222.0) internal successors, (16206), 73 states have internal predecessors, (16206), 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) [2022-12-13 15:15:31,028 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 222.0) internal successors, (16206), 73 states have internal predecessors, (16206), 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) [2022-12-13 15:15:31,028 INFO L175 Difference]: Start difference. First operand has 932 places, 2250 transitions, 64747 flow. Second operand 72 states and 4699 transitions. [2022-12-13 15:15:31,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1002 places, 2622 transitions, 82421 flow