./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R --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 7faf759f4f4392e84815a483ab24e4497f918cd291dc733acf407d398902eccf --- 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-38b53e6 [2022-11-25 17:22:35,318 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:22:35,320 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:22:35,360 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:22:35,361 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:22:35,362 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:22:35,363 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:22:35,365 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:22:35,366 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:22:35,379 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:22:35,380 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:22:35,381 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:22:35,382 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:22:35,383 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:22:35,384 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:22:35,385 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:22:35,385 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:22:35,386 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:22:35,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:22:35,390 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:22:35,393 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:22:35,396 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:22:35,399 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:22:35,400 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:22:35,411 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:22:35,412 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:22:35,412 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:22:35,413 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:22:35,413 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:22:35,414 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:22:35,415 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:22:35,415 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:22:35,416 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:22:35,417 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:22:35,418 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:22:35,418 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:22:35,421 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:22:35,422 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:22:35,423 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:22:35,424 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:22:35,425 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:22:35,426 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:22:35,475 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:22:35,478 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:22:35,478 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:22:35,479 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:22:35,480 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:22:35,480 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:22:35,480 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:22:35,481 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:22:35,481 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:22:35,481 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:22:35,482 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:22:35,483 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:22:35,483 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:22:35,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:22:35,483 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:22:35,483 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:22:35,484 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:22:35,484 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:22:35,484 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:22:35,484 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:22:35,484 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:22:35,485 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:22:35,485 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:22:35,485 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:22:35,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:22:35,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:22:35,486 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:22:35,486 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:22:35,486 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:22:35,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:22:35,487 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:22:35,487 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:22:35,488 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:22:35,488 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:22:35,488 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_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7faf759f4f4392e84815a483ab24e4497f918cd291dc733acf407d398902eccf [2022-11-25 17:22:35,785 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:22:35,806 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:22:35,809 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:22:35,810 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:22:35,810 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:22:35,812 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c [2022-11-25 17:22:38,822 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:22:39,057 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:22:39,057 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c [2022-11-25 17:22:39,063 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/data/757d2c8ce/f279e040b6e3474cac2dc863058a660a/FLAGadd1fd6f2 [2022-11-25 17:22:39,076 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/data/757d2c8ce/f279e040b6e3474cac2dc863058a660a [2022-11-25 17:22:39,079 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:22:39,080 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:22:39,082 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:22:39,082 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:22:39,086 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:22:39,086 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:22:39" (1/1) ... [2022-11-25 17:22:39,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46c9f4b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:22:39, skipping insertion in model container [2022-11-25 17:22:39,088 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:22:39" (1/1) ... [2022-11-25 17:22:39,095 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:22:39,112 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:22:39,252 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:22:39,254 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:22:39,254 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:22:39,258 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:22:39,260 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:22:39,262 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:22:39,267 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:22:39,269 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:22:39,270 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:22:39,271 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:22:39,272 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:22:39,273 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:22:39,275 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:22:39,276 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:22:39,291 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_d40d8be3-60a3-462d-939c-471a56ec85b9/sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c[2591,2604] [2022-11-25 17:22:39,296 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:22:39,305 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:22:39,316 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:22:39,317 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:22:39,317 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:22:39,318 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:22:39,318 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:22:39,319 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:22:39,320 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:22:39,320 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:22:39,321 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:22:39,322 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:22:39,322 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:22:39,323 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:22:39,324 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:22:39,325 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:22:39,329 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_d40d8be3-60a3-462d-939c-471a56ec85b9/sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c[2591,2604] [2022-11-25 17:22:39,330 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:22:39,344 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:22:39,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:22:39 WrapperNode [2022-11-25 17:22:39,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:22:39,346 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:22:39,346 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:22:39,346 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:22:39,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:22:39" (1/1) ... [2022-11-25 17:22:39,361 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:22:39" (1/1) ... [2022-11-25 17:22:39,380 INFO L138 Inliner]: procedures = 22, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2022-11-25 17:22:39,381 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:22:39,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:22:39,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:22:39,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:22:39,390 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:22:39" (1/1) ... [2022-11-25 17:22:39,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:22:39" (1/1) ... [2022-11-25 17:22:39,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:22:39" (1/1) ... [2022-11-25 17:22:39,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:22:39" (1/1) ... [2022-11-25 17:22:39,398 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:22:39" (1/1) ... [2022-11-25 17:22:39,402 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:22:39" (1/1) ... [2022-11-25 17:22:39,404 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:22:39" (1/1) ... [2022-11-25 17:22:39,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:22:39" (1/1) ... [2022-11-25 17:22:39,407 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:22:39,408 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:22:39,408 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:22:39,408 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:22:39,409 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:22:39" (1/1) ... [2022-11-25 17:22:39,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:22:39,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:22:39,441 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:22:39,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:22:39,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:22:39,487 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 17:22:39,487 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 17:22:39,487 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 17:22:39,487 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 17:22:39,487 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 17:22:39,487 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 17:22:39,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:22:39,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:22:39,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:22:39,488 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 17:22:39,488 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 17:22:39,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:22:39,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:22:39,489 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:22:39,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:22:39,490 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:22:39,590 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:22:39,592 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:22:39,816 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:22:39,929 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:22:39,930 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 17:22:39,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:22:39 BoogieIcfgContainer [2022-11-25 17:22:39,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:22:39,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:22:39,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:22:39,939 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:22:39,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:22:39" (1/3) ... [2022-11-25 17:22:39,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c256518 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:22:39, skipping insertion in model container [2022-11-25 17:22:39,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:22:39" (2/3) ... [2022-11-25 17:22:39,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c256518 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:22:39, skipping insertion in model container [2022-11-25 17:22:39,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:22:39" (3/3) ... [2022-11-25 17:22:39,942 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-mult-equiv.wvr.c [2022-11-25 17:22:39,951 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 17:22:39,962 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:22:39,962 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:22:39,963 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:22:40,074 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 17:22:40,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 97 transitions, 218 flow [2022-11-25 17:22:40,183 INFO L130 PetriNetUnfolder]: 7/94 cut-off events. [2022-11-25 17:22:40,188 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:22:40,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 94 events. 7/94 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2022-11-25 17:22:40,193 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 97 transitions, 218 flow [2022-11-25 17:22:40,199 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 83 transitions, 184 flow [2022-11-25 17:22:40,204 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:22:40,229 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 83 transitions, 184 flow [2022-11-25 17:22:40,233 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 83 transitions, 184 flow [2022-11-25 17:22:40,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 83 transitions, 184 flow [2022-11-25 17:22:40,262 INFO L130 PetriNetUnfolder]: 7/83 cut-off events. [2022-11-25 17:22:40,263 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:22:40,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 83 events. 7/83 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2022-11-25 17:22:40,265 INFO L119 LiptonReduction]: Number of co-enabled transitions 860 [2022-11-25 17:22:43,438 INFO L134 LiptonReduction]: Checked pairs total: 1214 [2022-11-25 17:22:43,439 INFO L136 LiptonReduction]: Total number of compositions: 67 [2022-11-25 17:22:43,461 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:22:43,471 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;@43b7a4c1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:22:43,472 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-25 17:22:43,491 INFO L130 PetriNetUnfolder]: 3/22 cut-off events. [2022-11-25 17:22:43,491 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:22:43,491 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:22:43,492 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:22:43,492 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:22:43,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:22:43,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1017070180, now seen corresponding path program 1 times [2022-11-25 17:22:43,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:22:43,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079952180] [2022-11-25 17:22:43,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:22:43,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:22:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:22:44,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:44,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:22:44,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079952180] [2022-11-25 17:22:44,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079952180] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:22:44,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:22:44,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:22:44,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183320106] [2022-11-25 17:22:44,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:22:44,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:22:44,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:22:44,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:22:44,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:22:44,543 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 164 [2022-11-25 17:22:44,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:44,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:22:44,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 164 [2022-11-25 17:22:44,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:22:44,736 INFO L130 PetriNetUnfolder]: 271/426 cut-off events. [2022-11-25 17:22:44,740 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2022-11-25 17:22:44,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 426 events. 271/426 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1519 event pairs, 37 based on Foata normal form. 1/279 useless extension candidates. Maximal degree in co-relation 671. Up to 309 conditions per place. [2022-11-25 17:22:44,752 INFO L137 encePairwiseOnDemand]: 159/164 looper letters, 30 selfloop transitions, 4 changer transitions 1/39 dead transitions. [2022-11-25 17:22:44,752 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 39 transitions, 181 flow [2022-11-25 17:22:44,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:22:44,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:22:44,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 285 transitions. [2022-11-25 17:22:44,780 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2022-11-25 17:22:44,780 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 285 transitions. [2022-11-25 17:22:44,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 285 transitions. [2022-11-25 17:22:44,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:22:44,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 285 transitions. [2022-11-25 17:22:44,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:44,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:44,810 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:44,811 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 64 flow. Second operand 3 states and 285 transitions. [2022-11-25 17:22:44,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 39 transitions, 181 flow [2022-11-25 17:22:44,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 39 transitions, 159 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 17:22:44,819 INFO L231 Difference]: Finished difference. Result has 27 places, 26 transitions, 78 flow [2022-11-25 17:22:44,821 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=27, PETRI_TRANSITIONS=26} [2022-11-25 17:22:44,826 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2022-11-25 17:22:44,826 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 78 flow [2022-11-25 17:22:44,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:44,826 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:22:44,827 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:22:44,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:22:44,827 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:22:44,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:22:44,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1921628699, now seen corresponding path program 1 times [2022-11-25 17:22:44,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:22:44,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923261814] [2022-11-25 17:22:44,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:22:44,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:22:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:22:45,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:45,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:22:45,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923261814] [2022-11-25 17:22:45,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923261814] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:22:45,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:22:45,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:22:45,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957991815] [2022-11-25 17:22:45,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:22:45,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:22:45,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:22:45,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:22:45,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:22:45,305 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 164 [2022-11-25 17:22:45,306 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 78 flow. Second operand has 6 states, 6 states have (on average 77.16666666666667) internal successors, (463), 6 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:45,307 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:22:45,307 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 164 [2022-11-25 17:22:45,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:22:45,618 INFO L130 PetriNetUnfolder]: 359/564 cut-off events. [2022-11-25 17:22:45,618 INFO L131 PetriNetUnfolder]: For 146/146 co-relation queries the response was YES. [2022-11-25 17:22:45,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1340 conditions, 564 events. 359/564 cut-off events. For 146/146 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2209 event pairs, 27 based on Foata normal form. 28/584 useless extension candidates. Maximal degree in co-relation 302. Up to 227 conditions per place. [2022-11-25 17:22:45,622 INFO L137 encePairwiseOnDemand]: 157/164 looper letters, 62 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2022-11-25 17:22:45,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 76 transitions, 359 flow [2022-11-25 17:22:45,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:22:45,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:22:45,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 592 transitions. [2022-11-25 17:22:45,625 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5156794425087108 [2022-11-25 17:22:45,626 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 592 transitions. [2022-11-25 17:22:45,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 592 transitions. [2022-11-25 17:22:45,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:22:45,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 592 transitions. [2022-11-25 17:22:45,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 84.57142857142857) internal successors, (592), 7 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:45,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 164.0) internal successors, (1312), 8 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:45,633 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 164.0) internal successors, (1312), 8 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:45,633 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 78 flow. Second operand 7 states and 592 transitions. [2022-11-25 17:22:45,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 76 transitions, 359 flow [2022-11-25 17:22:45,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 76 transitions, 351 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:22:45,636 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 154 flow [2022-11-25 17:22:45,636 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=154, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2022-11-25 17:22:45,637 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2022-11-25 17:22:45,637 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 154 flow [2022-11-25 17:22:45,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 77.16666666666667) internal successors, (463), 6 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:45,638 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:22:45,638 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:22:45,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:22:45,639 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:22:45,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:22:45,640 INFO L85 PathProgramCache]: Analyzing trace with hash -705223119, now seen corresponding path program 2 times [2022-11-25 17:22:45,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:22:45,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916953376] [2022-11-25 17:22:45,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:22:45,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:22:45,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:22:45,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:45,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:22:45,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916953376] [2022-11-25 17:22:45,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916953376] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:22:45,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:22:45,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:22:45,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963364608] [2022-11-25 17:22:45,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:22:45,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:22:45,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:22:45,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:22:45,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:22:45,872 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 164 [2022-11-25 17:22:45,873 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 77.6) internal successors, (388), 5 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:45,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:22:45,873 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 164 [2022-11-25 17:22:45,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:22:46,178 INFO L130 PetriNetUnfolder]: 611/948 cut-off events. [2022-11-25 17:22:46,178 INFO L131 PetriNetUnfolder]: For 560/564 co-relation queries the response was YES. [2022-11-25 17:22:46,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2654 conditions, 948 events. 611/948 cut-off events. For 560/564 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4125 event pairs, 21 based on Foata normal form. 16/964 useless extension candidates. Maximal degree in co-relation 1764. Up to 348 conditions per place. [2022-11-25 17:22:46,186 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 67 selfloop transitions, 15 changer transitions 3/87 dead transitions. [2022-11-25 17:22:46,187 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 87 transitions, 485 flow [2022-11-25 17:22:46,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:22:46,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:22:46,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 525 transitions. [2022-11-25 17:22:46,190 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5335365853658537 [2022-11-25 17:22:46,190 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 525 transitions. [2022-11-25 17:22:46,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 525 transitions. [2022-11-25 17:22:46,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:22:46,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 525 transitions. [2022-11-25 17:22:46,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 87.5) internal successors, (525), 6 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:46,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 164.0) internal successors, (1148), 7 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:46,195 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 164.0) internal successors, (1148), 7 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:46,195 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 154 flow. Second operand 6 states and 525 transitions. [2022-11-25 17:22:46,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 87 transitions, 485 flow [2022-11-25 17:22:46,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 87 transitions, 485 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:22:46,203 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 241 flow [2022-11-25 17:22:46,203 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2022-11-25 17:22:46,204 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2022-11-25 17:22:46,204 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 241 flow [2022-11-25 17:22:46,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 77.6) internal successors, (388), 5 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:46,205 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:22:46,205 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:22:46,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:22:46,205 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:22:46,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:22:46,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1828460495, now seen corresponding path program 3 times [2022-11-25 17:22:46,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:22:46,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781068231] [2022-11-25 17:22:46,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:22:46,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:22:46,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:22:46,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:46,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:22:46,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781068231] [2022-11-25 17:22:46,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781068231] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:22:46,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:22:46,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:22:46,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844967157] [2022-11-25 17:22:46,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:22:46,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:22:46,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:22:46,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:22:46,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:22:46,472 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 164 [2022-11-25 17:22:46,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 241 flow. Second operand has 5 states, 5 states have (on average 78.6) internal successors, (393), 5 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:46,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:22:46,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 164 [2022-11-25 17:22:46,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:22:46,733 INFO L130 PetriNetUnfolder]: 720/1121 cut-off events. [2022-11-25 17:22:46,734 INFO L131 PetriNetUnfolder]: For 1754/1758 co-relation queries the response was YES. [2022-11-25 17:22:46,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3633 conditions, 1121 events. 720/1121 cut-off events. For 1754/1758 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5073 event pairs, 107 based on Foata normal form. 28/1141 useless extension candidates. Maximal degree in co-relation 2582. Up to 799 conditions per place. [2022-11-25 17:22:46,743 INFO L137 encePairwiseOnDemand]: 157/164 looper letters, 57 selfloop transitions, 15 changer transitions 3/77 dead transitions. [2022-11-25 17:22:46,744 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 77 transitions, 552 flow [2022-11-25 17:22:46,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:22:46,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:22:46,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 510 transitions. [2022-11-25 17:22:46,746 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2022-11-25 17:22:46,746 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 510 transitions. [2022-11-25 17:22:46,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 510 transitions. [2022-11-25 17:22:46,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:22:46,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 510 transitions. [2022-11-25 17:22:46,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 85.0) internal successors, (510), 6 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:46,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 164.0) internal successors, (1148), 7 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:46,779 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 164.0) internal successors, (1148), 7 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:46,779 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 241 flow. Second operand 6 states and 510 transitions. [2022-11-25 17:22:46,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 77 transitions, 552 flow [2022-11-25 17:22:46,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 77 transitions, 534 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-11-25 17:22:46,789 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 335 flow [2022-11-25 17:22:46,790 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=335, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2022-11-25 17:22:46,791 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 20 predicate places. [2022-11-25 17:22:46,791 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 335 flow [2022-11-25 17:22:46,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.6) internal successors, (393), 5 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:46,792 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:22:46,793 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:22:46,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:22:46,793 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:22:46,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:22:46,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1490921072, now seen corresponding path program 1 times [2022-11-25 17:22:46,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:22:46,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156536229] [2022-11-25 17:22:46,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:22:46,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:22:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:22:47,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:47,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:22:47,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156536229] [2022-11-25 17:22:47,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156536229] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:22:47,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:22:47,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:22:47,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136511212] [2022-11-25 17:22:47,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:22:47,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:22:47,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:22:47,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:22:47,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:22:47,110 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 164 [2022-11-25 17:22:47,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 335 flow. Second operand has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:47,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:22:47,111 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 164 [2022-11-25 17:22:47,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:22:47,548 INFO L130 PetriNetUnfolder]: 1150/1833 cut-off events. [2022-11-25 17:22:47,548 INFO L131 PetriNetUnfolder]: For 4503/4503 co-relation queries the response was YES. [2022-11-25 17:22:47,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6743 conditions, 1833 events. 1150/1833 cut-off events. For 4503/4503 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8634 event pairs, 369 based on Foata normal form. 38/1871 useless extension candidates. Maximal degree in co-relation 5038. Up to 1027 conditions per place. [2022-11-25 17:22:47,562 INFO L137 encePairwiseOnDemand]: 157/164 looper letters, 71 selfloop transitions, 25 changer transitions 0/96 dead transitions. [2022-11-25 17:22:47,563 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 96 transitions, 727 flow [2022-11-25 17:22:47,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:22:47,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:22:47,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 441 transitions. [2022-11-25 17:22:47,564 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5378048780487805 [2022-11-25 17:22:47,565 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 441 transitions. [2022-11-25 17:22:47,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 441 transitions. [2022-11-25 17:22:47,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:22:47,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 441 transitions. [2022-11-25 17:22:47,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 88.2) internal successors, (441), 5 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:47,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:47,568 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:47,568 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 335 flow. Second operand 5 states and 441 transitions. [2022-11-25 17:22:47,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 96 transitions, 727 flow [2022-11-25 17:22:47,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 96 transitions, 700 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-11-25 17:22:47,584 INFO L231 Difference]: Finished difference. Result has 55 places, 56 transitions, 456 flow [2022-11-25 17:22:47,585 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=456, PETRI_PLACES=55, PETRI_TRANSITIONS=56} [2022-11-25 17:22:47,585 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2022-11-25 17:22:47,585 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 56 transitions, 456 flow [2022-11-25 17:22:47,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:47,586 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:22:47,586 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:22:47,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:22:47,586 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:22:47,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:22:47,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1834200266, now seen corresponding path program 2 times [2022-11-25 17:22:47,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:22:47,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917295163] [2022-11-25 17:22:47,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:22:47,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:22:47,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:22:47,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:47,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:22:47,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917295163] [2022-11-25 17:22:47,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917295163] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:22:47,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:22:47,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:22:47,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584008624] [2022-11-25 17:22:47,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:22:47,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:22:47,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:22:47,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:22:47,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:22:47,909 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 164 [2022-11-25 17:22:47,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 56 transitions, 456 flow. Second operand has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:47,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:22:47,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 164 [2022-11-25 17:22:47,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:22:48,451 INFO L130 PetriNetUnfolder]: 1528/2436 cut-off events. [2022-11-25 17:22:48,451 INFO L131 PetriNetUnfolder]: For 10735/10735 co-relation queries the response was YES. [2022-11-25 17:22:48,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10438 conditions, 2436 events. 1528/2436 cut-off events. For 10735/10735 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 12417 event pairs, 244 based on Foata normal form. 28/2464 useless extension candidates. Maximal degree in co-relation 9331. Up to 1060 conditions per place. [2022-11-25 17:22:48,472 INFO L137 encePairwiseOnDemand]: 157/164 looper letters, 87 selfloop transitions, 40 changer transitions 3/130 dead transitions. [2022-11-25 17:22:48,472 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 130 transitions, 1286 flow [2022-11-25 17:22:48,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:22:48,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:22:48,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 437 transitions. [2022-11-25 17:22:48,474 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5329268292682927 [2022-11-25 17:22:48,474 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 437 transitions. [2022-11-25 17:22:48,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 437 transitions. [2022-11-25 17:22:48,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:22:48,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 437 transitions. [2022-11-25 17:22:48,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 87.4) internal successors, (437), 5 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:48,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:48,478 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:48,478 INFO L175 Difference]: Start difference. First operand has 55 places, 56 transitions, 456 flow. Second operand 5 states and 437 transitions. [2022-11-25 17:22:48,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 130 transitions, 1286 flow [2022-11-25 17:22:48,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 130 transitions, 1215 flow, removed 12 selfloop flow, removed 1 redundant places. [2022-11-25 17:22:48,509 INFO L231 Difference]: Finished difference. Result has 61 places, 85 transitions, 902 flow [2022-11-25 17:22:48,510 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=902, PETRI_PLACES=61, PETRI_TRANSITIONS=85} [2022-11-25 17:22:48,510 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 31 predicate places. [2022-11-25 17:22:48,511 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 85 transitions, 902 flow [2022-11-25 17:22:48,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:48,511 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:22:48,511 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:22:48,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:22:48,512 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:22:48,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:22:48,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1601642166, now seen corresponding path program 1 times [2022-11-25 17:22:48,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:22:48,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501677167] [2022-11-25 17:22:48,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:22:48,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:22:48,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:22:48,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:48,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:22:48,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501677167] [2022-11-25 17:22:48,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501677167] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:22:48,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:22:48,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:22:48,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677159122] [2022-11-25 17:22:48,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:22:48,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:22:48,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:22:48,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:22:48,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:22:48,762 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 164 [2022-11-25 17:22:48,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 85 transitions, 902 flow. Second operand has 5 states, 5 states have (on average 77.8) internal successors, (389), 5 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:48,763 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:22:48,763 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 164 [2022-11-25 17:22:48,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:22:49,249 INFO L130 PetriNetUnfolder]: 1589/2560 cut-off events. [2022-11-25 17:22:49,249 INFO L131 PetriNetUnfolder]: For 14359/14469 co-relation queries the response was YES. [2022-11-25 17:22:49,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12173 conditions, 2560 events. 1589/2560 cut-off events. For 14359/14469 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 13698 event pairs, 267 based on Foata normal form. 202/2751 useless extension candidates. Maximal degree in co-relation 11125. Up to 1829 conditions per place. [2022-11-25 17:22:49,274 INFO L137 encePairwiseOnDemand]: 158/164 looper letters, 106 selfloop transitions, 19 changer transitions 4/133 dead transitions. [2022-11-25 17:22:49,274 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 133 transitions, 1505 flow [2022-11-25 17:22:49,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:22:49,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:22:49,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 431 transitions. [2022-11-25 17:22:49,276 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.525609756097561 [2022-11-25 17:22:49,276 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 431 transitions. [2022-11-25 17:22:49,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 431 transitions. [2022-11-25 17:22:49,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:22:49,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 431 transitions. [2022-11-25 17:22:49,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 86.2) internal successors, (431), 5 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:49,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:49,279 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:49,280 INFO L175 Difference]: Start difference. First operand has 61 places, 85 transitions, 902 flow. Second operand 5 states and 431 transitions. [2022-11-25 17:22:49,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 133 transitions, 1505 flow [2022-11-25 17:22:49,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 133 transitions, 1501 flow, removed 2 selfloop flow, removed 0 redundant places. [2022-11-25 17:22:49,409 INFO L231 Difference]: Finished difference. Result has 66 places, 88 transitions, 982 flow [2022-11-25 17:22:49,410 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=982, PETRI_PLACES=66, PETRI_TRANSITIONS=88} [2022-11-25 17:22:49,410 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 36 predicate places. [2022-11-25 17:22:49,411 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 88 transitions, 982 flow [2022-11-25 17:22:49,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 77.8) internal successors, (389), 5 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:49,411 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:22:49,411 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:22:49,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 17:22:49,412 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:22:49,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:22:49,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1354046554, now seen corresponding path program 3 times [2022-11-25 17:22:49,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:22:49,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460756990] [2022-11-25 17:22:49,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:22:49,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:22:49,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:22:49,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:49,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:22:49,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460756990] [2022-11-25 17:22:49,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460756990] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:22:49,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:22:49,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:22:49,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065846134] [2022-11-25 17:22:49,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:22:49,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:22:49,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:22:49,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:22:49,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:22:49,699 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 164 [2022-11-25 17:22:49,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 88 transitions, 982 flow. Second operand has 5 states, 5 states have (on average 78.0) internal successors, (390), 5 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:49,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:22:49,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 164 [2022-11-25 17:22:49,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:22:50,331 INFO L130 PetriNetUnfolder]: 1929/3099 cut-off events. [2022-11-25 17:22:50,331 INFO L131 PetriNetUnfolder]: For 16806/16806 co-relation queries the response was YES. [2022-11-25 17:22:50,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15027 conditions, 3099 events. 1929/3099 cut-off events. For 16806/16806 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 16478 event pairs, 521 based on Foata normal form. 34/3133 useless extension candidates. Maximal degree in co-relation 13453. Up to 1594 conditions per place. [2022-11-25 17:22:50,369 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 88 selfloop transitions, 64 changer transitions 7/159 dead transitions. [2022-11-25 17:22:50,370 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 159 transitions, 1793 flow [2022-11-25 17:22:50,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:22:50,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:22:50,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 518 transitions. [2022-11-25 17:22:50,372 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5264227642276422 [2022-11-25 17:22:50,372 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 518 transitions. [2022-11-25 17:22:50,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 518 transitions. [2022-11-25 17:22:50,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:22:50,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 518 transitions. [2022-11-25 17:22:50,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 86.33333333333333) internal successors, (518), 6 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:50,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 164.0) internal successors, (1148), 7 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:50,377 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 164.0) internal successors, (1148), 7 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:50,377 INFO L175 Difference]: Start difference. First operand has 66 places, 88 transitions, 982 flow. Second operand 6 states and 518 transitions. [2022-11-25 17:22:50,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 159 transitions, 1793 flow [2022-11-25 17:22:50,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 159 transitions, 1767 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-25 17:22:50,431 INFO L231 Difference]: Finished difference. Result has 73 places, 101 transitions, 1323 flow [2022-11-25 17:22:50,432 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1323, PETRI_PLACES=73, PETRI_TRANSITIONS=101} [2022-11-25 17:22:50,434 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 43 predicate places. [2022-11-25 17:22:50,435 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 101 transitions, 1323 flow [2022-11-25 17:22:50,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.0) internal successors, (390), 5 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:50,435 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:22:50,435 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:22:50,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 17:22:50,436 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:22:50,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:22:50,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1358330108, now seen corresponding path program 4 times [2022-11-25 17:22:50,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:22:50,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524025905] [2022-11-25 17:22:50,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:22:50,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:22:50,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:22:50,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:50,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:22:50,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524025905] [2022-11-25 17:22:50,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524025905] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:22:50,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572908708] [2022-11-25 17:22:50,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:22:50,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:22:50,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:22:50,746 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:22:50,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:22:50,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:22:50,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:22:50,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:22:50,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:22:51,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:51,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:22:51,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:51,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572908708] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:22:51,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:22:51,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 5] total 13 [2022-11-25 17:22:51,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416272673] [2022-11-25 17:22:51,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:22:51,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:22:51,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:22:51,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:22:51,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:22:51,367 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 164 [2022-11-25 17:22:51,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 101 transitions, 1323 flow. Second operand has 6 states, 6 states have (on average 72.33333333333333) internal successors, (434), 6 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:51,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:22:51,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 164 [2022-11-25 17:22:51,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:22:52,482 INFO L130 PetriNetUnfolder]: 3324/5413 cut-off events. [2022-11-25 17:22:52,482 INFO L131 PetriNetUnfolder]: For 37664/37664 co-relation queries the response was YES. [2022-11-25 17:22:52,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28927 conditions, 5413 events. 3324/5413 cut-off events. For 37664/37664 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 33053 event pairs, 277 based on Foata normal form. 28/5441 useless extension candidates. Maximal degree in co-relation 25775. Up to 1702 conditions per place. [2022-11-25 17:22:52,541 INFO L137 encePairwiseOnDemand]: 152/164 looper letters, 127 selfloop transitions, 136 changer transitions 2/265 dead transitions. [2022-11-25 17:22:52,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 265 transitions, 3532 flow [2022-11-25 17:22:52,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:22:52,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:22:52,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 589 transitions. [2022-11-25 17:22:52,544 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5130662020905923 [2022-11-25 17:22:52,544 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 589 transitions. [2022-11-25 17:22:52,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 589 transitions. [2022-11-25 17:22:52,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:22:52,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 589 transitions. [2022-11-25 17:22:52,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 84.14285714285714) internal successors, (589), 7 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:52,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 164.0) internal successors, (1312), 8 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:52,552 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 164.0) internal successors, (1312), 8 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:52,552 INFO L175 Difference]: Start difference. First operand has 73 places, 101 transitions, 1323 flow. Second operand 7 states and 589 transitions. [2022-11-25 17:22:52,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 265 transitions, 3532 flow [2022-11-25 17:22:52,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 265 transitions, 3500 flow, removed 16 selfloop flow, removed 0 redundant places. [2022-11-25 17:22:52,697 INFO L231 Difference]: Finished difference. Result has 85 places, 183 transitions, 3047 flow [2022-11-25 17:22:52,697 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=1307, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3047, PETRI_PLACES=85, PETRI_TRANSITIONS=183} [2022-11-25 17:22:52,698 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 55 predicate places. [2022-11-25 17:22:52,698 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 183 transitions, 3047 flow [2022-11-25 17:22:52,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.33333333333333) internal successors, (434), 6 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:52,699 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:22:52,699 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:22:52,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:22:52,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-25 17:22:52,905 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:22:52,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:22:52,905 INFO L85 PathProgramCache]: Analyzing trace with hash 688788540, now seen corresponding path program 5 times [2022-11-25 17:22:52,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:22:52,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694693308] [2022-11-25 17:22:52,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:22:52,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:22:52,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:22:53,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:53,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:22:53,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694693308] [2022-11-25 17:22:53,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694693308] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:22:53,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703649280] [2022-11-25 17:22:53,244 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:22:53,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:22:53,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:22:53,245 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:22:53,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:22:53,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:22:53,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:22:53,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:22:53,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:22:53,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:53,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:22:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:53,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703649280] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:22:53,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:22:53,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 5] total 13 [2022-11-25 17:22:53,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301468492] [2022-11-25 17:22:53,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:22:53,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:22:53,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:22:53,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:22:53,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:22:53,779 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 164 [2022-11-25 17:22:53,780 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 183 transitions, 3047 flow. Second operand has 6 states, 6 states have (on average 72.33333333333333) internal successors, (434), 6 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:53,780 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:22:53,780 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 164 [2022-11-25 17:22:53,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:22:55,082 INFO L130 PetriNetUnfolder]: 3349/5466 cut-off events. [2022-11-25 17:22:55,082 INFO L131 PetriNetUnfolder]: For 55706/55706 co-relation queries the response was YES. [2022-11-25 17:22:55,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34726 conditions, 5466 events. 3349/5466 cut-off events. For 55706/55706 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 33416 event pairs, 303 based on Foata normal form. 6/5472 useless extension candidates. Maximal degree in co-relation 31704. Up to 1723 conditions per place. [2022-11-25 17:22:55,132 INFO L137 encePairwiseOnDemand]: 152/164 looper letters, 134 selfloop transitions, 138 changer transitions 1/273 dead transitions. [2022-11-25 17:22:55,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 273 transitions, 4236 flow [2022-11-25 17:22:55,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:22:55,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:22:55,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 589 transitions. [2022-11-25 17:22:55,135 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5130662020905923 [2022-11-25 17:22:55,135 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 589 transitions. [2022-11-25 17:22:55,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 589 transitions. [2022-11-25 17:22:55,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:22:55,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 589 transitions. [2022-11-25 17:22:55,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 84.14285714285714) internal successors, (589), 7 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:55,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 164.0) internal successors, (1312), 8 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:55,141 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 164.0) internal successors, (1312), 8 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:55,141 INFO L175 Difference]: Start difference. First operand has 85 places, 183 transitions, 3047 flow. Second operand 7 states and 589 transitions. [2022-11-25 17:22:55,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 273 transitions, 4236 flow [2022-11-25 17:22:55,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 273 transitions, 4166 flow, removed 35 selfloop flow, removed 0 redundant places. [2022-11-25 17:22:55,340 INFO L231 Difference]: Finished difference. Result has 95 places, 192 transitions, 3560 flow [2022-11-25 17:22:55,340 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=2981, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3560, PETRI_PLACES=95, PETRI_TRANSITIONS=192} [2022-11-25 17:22:55,341 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 65 predicate places. [2022-11-25 17:22:55,341 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 192 transitions, 3560 flow [2022-11-25 17:22:55,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.33333333333333) internal successors, (434), 6 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:55,341 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:22:55,341 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:22:55,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:22:55,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:22:55,548 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:22:55,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:22:55,548 INFO L85 PathProgramCache]: Analyzing trace with hash 911113706, now seen corresponding path program 6 times [2022-11-25 17:22:55,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:22:55,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923166932] [2022-11-25 17:22:55,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:22:55,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:22:55,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:22:55,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:55,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:22:55,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923166932] [2022-11-25 17:22:55,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923166932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:22:55,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:22:55,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:22:55,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565636542] [2022-11-25 17:22:55,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:22:55,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:22:55,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:22:55,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:22:55,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:22:55,903 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 164 [2022-11-25 17:22:55,904 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 192 transitions, 3560 flow. Second operand has 5 states, 5 states have (on average 78.0) internal successors, (390), 5 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:55,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:22:55,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 164 [2022-11-25 17:22:55,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:22:57,553 INFO L130 PetriNetUnfolder]: 4117/6586 cut-off events. [2022-11-25 17:22:57,553 INFO L131 PetriNetUnfolder]: For 90427/90427 co-relation queries the response was YES. [2022-11-25 17:22:57,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46083 conditions, 6586 events. 4117/6586 cut-off events. For 90427/90427 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 39734 event pairs, 1187 based on Foata normal form. 76/6662 useless extension candidates. Maximal degree in co-relation 42863. Up to 2754 conditions per place. [2022-11-25 17:22:57,615 INFO L137 encePairwiseOnDemand]: 157/164 looper letters, 144 selfloop transitions, 147 changer transitions 3/294 dead transitions. [2022-11-25 17:22:57,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 294 transitions, 5553 flow [2022-11-25 17:22:57,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:22:57,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:22:57,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 441 transitions. [2022-11-25 17:22:57,618 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5378048780487805 [2022-11-25 17:22:57,618 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 441 transitions. [2022-11-25 17:22:57,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 441 transitions. [2022-11-25 17:22:57,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:22:57,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 441 transitions. [2022-11-25 17:22:57,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 88.2) internal successors, (441), 5 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:57,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:57,622 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:57,622 INFO L175 Difference]: Start difference. First operand has 95 places, 192 transitions, 3560 flow. Second operand 5 states and 441 transitions. [2022-11-25 17:22:57,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 294 transitions, 5553 flow [2022-11-25 17:22:57,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 294 transitions, 5414 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-11-25 17:22:57,922 INFO L231 Difference]: Finished difference. Result has 99 places, 220 transitions, 4429 flow [2022-11-25 17:22:57,922 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=3470, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4429, PETRI_PLACES=99, PETRI_TRANSITIONS=220} [2022-11-25 17:22:57,922 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 69 predicate places. [2022-11-25 17:22:57,923 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 220 transitions, 4429 flow [2022-11-25 17:22:57,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.0) internal successors, (390), 5 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:57,923 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:22:57,923 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:22:57,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 17:22:57,924 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:22:57,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:22:57,924 INFO L85 PathProgramCache]: Analyzing trace with hash 380892500, now seen corresponding path program 7 times [2022-11-25 17:22:57,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:22:57,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333554974] [2022-11-25 17:22:57,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:22:57,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:22:57,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:22:58,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:22:58,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:22:58,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333554974] [2022-11-25 17:22:58,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333554974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:22:58,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:22:58,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:22:58,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412063871] [2022-11-25 17:22:58,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:22:58,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:22:58,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:22:58,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:22:58,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:22:58,171 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 164 [2022-11-25 17:22:58,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 220 transitions, 4429 flow. Second operand has 5 states, 5 states have (on average 78.8) internal successors, (394), 5 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:58,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:22:58,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 164 [2022-11-25 17:22:58,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:22:59,641 INFO L130 PetriNetUnfolder]: 4320/6962 cut-off events. [2022-11-25 17:22:59,641 INFO L131 PetriNetUnfolder]: For 106965/106991 co-relation queries the response was YES. [2022-11-25 17:22:59,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48958 conditions, 6962 events. 4320/6962 cut-off events. For 106965/106991 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 42588 event pairs, 913 based on Foata normal form. 250/7212 useless extension candidates. Maximal degree in co-relation 45874. Up to 5007 conditions per place. [2022-11-25 17:22:59,797 INFO L137 encePairwiseOnDemand]: 158/164 looper letters, 163 selfloop transitions, 31 changer transitions 14/297 dead transitions. [2022-11-25 17:22:59,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 297 transitions, 5767 flow [2022-11-25 17:22:59,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:22:59,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:22:59,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 438 transitions. [2022-11-25 17:22:59,799 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5341463414634147 [2022-11-25 17:22:59,799 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 438 transitions. [2022-11-25 17:22:59,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 438 transitions. [2022-11-25 17:22:59,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:22:59,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 438 transitions. [2022-11-25 17:22:59,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 87.6) internal successors, (438), 5 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:59,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:59,803 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:22:59,803 INFO L175 Difference]: Start difference. First operand has 99 places, 220 transitions, 4429 flow. Second operand 5 states and 438 transitions. [2022-11-25 17:22:59,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 297 transitions, 5767 flow [2022-11-25 17:23:00,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 297 transitions, 5767 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:23:00,153 INFO L231 Difference]: Finished difference. Result has 105 places, 230 transitions, 4699 flow [2022-11-25 17:23:00,153 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=4416, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4699, PETRI_PLACES=105, PETRI_TRANSITIONS=230} [2022-11-25 17:23:00,153 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 75 predicate places. [2022-11-25 17:23:00,153 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 230 transitions, 4699 flow [2022-11-25 17:23:00,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.8) internal successors, (394), 5 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:00,154 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:23:00,154 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:00,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 17:23:00,154 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:23:00,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:00,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1315029562, now seen corresponding path program 8 times [2022-11-25 17:23:00,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:00,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833654460] [2022-11-25 17:23:00,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:00,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:00,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:00,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:00,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:00,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833654460] [2022-11-25 17:23:00,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833654460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:00,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:00,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:23:00,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085567365] [2022-11-25 17:23:00,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:00,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:23:00,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:00,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:23:00,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:23:00,456 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 164 [2022-11-25 17:23:00,457 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 230 transitions, 4699 flow. Second operand has 5 states, 5 states have (on average 78.0) internal successors, (390), 5 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:00,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:23:00,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 164 [2022-11-25 17:23:00,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:23:02,108 INFO L130 PetriNetUnfolder]: 5093/7957 cut-off events. [2022-11-25 17:23:02,109 INFO L131 PetriNetUnfolder]: For 127888/127888 co-relation queries the response was YES. [2022-11-25 17:23:02,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60137 conditions, 7957 events. 5093/7957 cut-off events. For 127888/127888 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 48219 event pairs, 811 based on Foata normal form. 148/8105 useless extension candidates. Maximal degree in co-relation 57565. Up to 2875 conditions per place. [2022-11-25 17:23:02,310 INFO L137 encePairwiseOnDemand]: 157/164 looper letters, 224 selfloop transitions, 164 changer transitions 5/393 dead transitions. [2022-11-25 17:23:02,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 393 transitions, 8094 flow [2022-11-25 17:23:02,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:23:02,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:23:02,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 520 transitions. [2022-11-25 17:23:02,317 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2022-11-25 17:23:02,317 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 520 transitions. [2022-11-25 17:23:02,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 520 transitions. [2022-11-25 17:23:02,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:23:02,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 520 transitions. [2022-11-25 17:23:02,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 86.66666666666667) internal successors, (520), 6 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:02,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 164.0) internal successors, (1148), 7 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:02,323 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 164.0) internal successors, (1148), 7 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:02,323 INFO L175 Difference]: Start difference. First operand has 105 places, 230 transitions, 4699 flow. Second operand 6 states and 520 transitions. [2022-11-25 17:23:02,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 393 transitions, 8094 flow [2022-11-25 17:23:02,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 393 transitions, 7975 flow, removed 38 selfloop flow, removed 1 redundant places. [2022-11-25 17:23:02,708 INFO L231 Difference]: Finished difference. Result has 111 places, 277 transitions, 6180 flow [2022-11-25 17:23:02,708 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=4621, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6180, PETRI_PLACES=111, PETRI_TRANSITIONS=277} [2022-11-25 17:23:02,709 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 81 predicate places. [2022-11-25 17:23:02,709 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 277 transitions, 6180 flow [2022-11-25 17:23:02,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.0) internal successors, (390), 5 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:02,710 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:23:02,710 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:02,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 17:23:02,710 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:23:02,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:02,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1882422188, now seen corresponding path program 9 times [2022-11-25 17:23:02,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:02,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010291362] [2022-11-25 17:23:02,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:02,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:02,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:02,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:02,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:02,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010291362] [2022-11-25 17:23:02,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010291362] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:02,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:02,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:23:02,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325664135] [2022-11-25 17:23:02,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:02,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:23:02,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:02,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:23:02,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:23:02,956 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 164 [2022-11-25 17:23:02,957 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 277 transitions, 6180 flow. Second operand has 5 states, 5 states have (on average 78.8) internal successors, (394), 5 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:02,957 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:23:02,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 164 [2022-11-25 17:23:02,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:23:04,572 INFO L130 PetriNetUnfolder]: 4967/7750 cut-off events. [2022-11-25 17:23:04,573 INFO L131 PetriNetUnfolder]: For 141808/141851 co-relation queries the response was YES. [2022-11-25 17:23:04,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61095 conditions, 7750 events. 4967/7750 cut-off events. For 141808/141851 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 46035 event pairs, 963 based on Foata normal form. 38/7784 useless extension candidates. Maximal degree in co-relation 58395. Up to 6682 conditions per place. [2022-11-25 17:23:04,666 INFO L137 encePairwiseOnDemand]: 157/164 looper letters, 157 selfloop transitions, 19 changer transitions 2/308 dead transitions. [2022-11-25 17:23:04,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 308 transitions, 6789 flow [2022-11-25 17:23:04,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:23:04,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:23:04,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 425 transitions. [2022-11-25 17:23:04,669 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2022-11-25 17:23:04,669 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 425 transitions. [2022-11-25 17:23:04,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 425 transitions. [2022-11-25 17:23:04,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:23:04,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 425 transitions. [2022-11-25 17:23:04,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:04,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:04,673 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:04,673 INFO L175 Difference]: Start difference. First operand has 111 places, 277 transitions, 6180 flow. Second operand 5 states and 425 transitions. [2022-11-25 17:23:04,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 308 transitions, 6789 flow [2022-11-25 17:23:05,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 308 transitions, 6497 flow, removed 39 selfloop flow, removed 3 redundant places. [2022-11-25 17:23:05,035 INFO L231 Difference]: Finished difference. Result has 114 places, 280 transitions, 6011 flow [2022-11-25 17:23:05,035 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=5896, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6011, PETRI_PLACES=114, PETRI_TRANSITIONS=280} [2022-11-25 17:23:05,036 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 84 predicate places. [2022-11-25 17:23:05,036 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 280 transitions, 6011 flow [2022-11-25 17:23:05,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.8) internal successors, (394), 5 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:05,036 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:23:05,036 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:05,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 17:23:05,036 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:23:05,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:05,037 INFO L85 PathProgramCache]: Analyzing trace with hash 572590136, now seen corresponding path program 10 times [2022-11-25 17:23:05,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:05,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320646871] [2022-11-25 17:23:05,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:05,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:05,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:05,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:05,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:05,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320646871] [2022-11-25 17:23:05,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320646871] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:05,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:05,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:23:05,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097647228] [2022-11-25 17:23:05,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:05,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:23:05,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:05,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:23:05,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:23:05,302 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 164 [2022-11-25 17:23:05,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 280 transitions, 6011 flow. Second operand has 5 states, 5 states have (on average 77.8) internal successors, (389), 5 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:05,302 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:23:05,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 164 [2022-11-25 17:23:05,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:23:07,238 INFO L130 PetriNetUnfolder]: 5148/8062 cut-off events. [2022-11-25 17:23:07,238 INFO L131 PetriNetUnfolder]: For 134248/134274 co-relation queries the response was YES. [2022-11-25 17:23:07,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61784 conditions, 8062 events. 5148/8062 cut-off events. For 134248/134274 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 48524 event pairs, 991 based on Foata normal form. 16/8078 useless extension candidates. Maximal degree in co-relation 59120. Up to 6657 conditions per place. [2022-11-25 17:23:07,312 INFO L137 encePairwiseOnDemand]: 157/164 looper letters, 165 selfloop transitions, 23 changer transitions 4/319 dead transitions. [2022-11-25 17:23:07,312 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 319 transitions, 6760 flow [2022-11-25 17:23:07,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:23:07,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:23:07,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 503 transitions. [2022-11-25 17:23:07,314 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5111788617886179 [2022-11-25 17:23:07,315 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 503 transitions. [2022-11-25 17:23:07,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 503 transitions. [2022-11-25 17:23:07,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:23:07,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 503 transitions. [2022-11-25 17:23:07,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:07,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 164.0) internal successors, (1148), 7 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:07,319 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 164.0) internal successors, (1148), 7 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:07,319 INFO L175 Difference]: Start difference. First operand has 114 places, 280 transitions, 6011 flow. Second operand 6 states and 503 transitions. [2022-11-25 17:23:07,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 319 transitions, 6760 flow [2022-11-25 17:23:07,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 319 transitions, 6620 flow, removed 37 selfloop flow, removed 6 redundant places. [2022-11-25 17:23:07,789 INFO L231 Difference]: Finished difference. Result has 112 places, 278 transitions, 5883 flow [2022-11-25 17:23:07,789 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=5730, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5883, PETRI_PLACES=112, PETRI_TRANSITIONS=278} [2022-11-25 17:23:07,790 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 82 predicate places. [2022-11-25 17:23:07,790 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 278 transitions, 5883 flow [2022-11-25 17:23:07,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 77.8) internal successors, (389), 5 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:07,791 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:23:07,791 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:07,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 17:23:07,791 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:23:07,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:07,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1914048513, now seen corresponding path program 1 times [2022-11-25 17:23:07,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:07,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661814794] [2022-11-25 17:23:07,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:07,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:07,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:08,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:08,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:08,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661814794] [2022-11-25 17:23:08,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661814794] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:23:08,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936261625] [2022-11-25 17:23:08,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:08,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:08,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:23:08,167 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:23:08,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:23:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:08,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:23:08,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:23:08,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:08,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:23:08,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:08,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936261625] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:23:08,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:23:08,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2022-11-25 17:23:08,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316253078] [2022-11-25 17:23:08,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:23:08,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:23:08,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:08,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:23:08,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:23:09,061 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 164 [2022-11-25 17:23:09,062 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 278 transitions, 5883 flow. Second operand has 12 states, 12 states have (on average 75.0) internal successors, (900), 12 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:09,062 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:23:09,062 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 164 [2022-11-25 17:23:09,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:23:11,624 INFO L130 PetriNetUnfolder]: 6602/10994 cut-off events. [2022-11-25 17:23:11,624 INFO L131 PetriNetUnfolder]: For 177365/178443 co-relation queries the response was YES. [2022-11-25 17:23:11,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84136 conditions, 10994 events. 6602/10994 cut-off events. For 177365/178443 co-relation queries the response was YES. Maximal size of possible extension queue 741. Compared 78820 event pairs, 292 based on Foata normal form. 476/11437 useless extension candidates. Maximal degree in co-relation 80911. Up to 5995 conditions per place. [2022-11-25 17:23:11,752 INFO L137 encePairwiseOnDemand]: 157/164 looper letters, 459 selfloop transitions, 180 changer transitions 6/662 dead transitions. [2022-11-25 17:23:11,752 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 662 transitions, 14667 flow [2022-11-25 17:23:11,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:23:11,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 17:23:11,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 734 transitions. [2022-11-25 17:23:11,755 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.497289972899729 [2022-11-25 17:23:11,756 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 734 transitions. [2022-11-25 17:23:11,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 734 transitions. [2022-11-25 17:23:11,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:23:11,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 734 transitions. [2022-11-25 17:23:11,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 81.55555555555556) internal successors, (734), 9 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:11,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 164.0) internal successors, (1640), 10 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:11,764 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 164.0) internal successors, (1640), 10 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:11,764 INFO L175 Difference]: Start difference. First operand has 112 places, 278 transitions, 5883 flow. Second operand 9 states and 734 transitions. [2022-11-25 17:23:11,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 662 transitions, 14667 flow [2022-11-25 17:23:12,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 662 transitions, 14623 flow, removed 5 selfloop flow, removed 5 redundant places. [2022-11-25 17:23:12,396 INFO L231 Difference]: Finished difference. Result has 118 places, 434 transitions, 9891 flow [2022-11-25 17:23:12,397 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=5839, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9891, PETRI_PLACES=118, PETRI_TRANSITIONS=434} [2022-11-25 17:23:12,397 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 88 predicate places. [2022-11-25 17:23:12,398 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 434 transitions, 9891 flow [2022-11-25 17:23:12,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 75.0) internal successors, (900), 12 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:12,398 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:23:12,398 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:12,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:23:12,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:12,615 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:23:12,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:12,615 INFO L85 PathProgramCache]: Analyzing trace with hash -2020314577, now seen corresponding path program 2 times [2022-11-25 17:23:12,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:12,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007901226] [2022-11-25 17:23:12,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:12,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:12,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:12,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:12,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007901226] [2022-11-25 17:23:12,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007901226] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:23:12,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898336998] [2022-11-25 17:23:12,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:23:12,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:12,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:23:12,915 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:23:12,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:23:13,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:23:13,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:23:13,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:23:13,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:23:13,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:13,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:23:13,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:13,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898336998] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:23:13,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:23:13,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-11-25 17:23:13,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061048141] [2022-11-25 17:23:13,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:23:13,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:23:13,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:13,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:23:13,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:23:13,614 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 164 [2022-11-25 17:23:13,615 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 434 transitions, 9891 flow. Second operand has 9 states, 9 states have (on average 78.0) internal successors, (702), 9 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:13,615 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:23:13,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 164 [2022-11-25 17:23:13,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:23:16,749 INFO L130 PetriNetUnfolder]: 7244/12240 cut-off events. [2022-11-25 17:23:16,749 INFO L131 PetriNetUnfolder]: For 248490/250031 co-relation queries the response was YES. [2022-11-25 17:23:16,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99476 conditions, 12240 events. 7244/12240 cut-off events. For 248490/250031 co-relation queries the response was YES. Maximal size of possible extension queue 874. Compared 91491 event pairs, 482 based on Foata normal form. 609/12803 useless extension candidates. Maximal degree in co-relation 95970. Up to 7134 conditions per place. [2022-11-25 17:23:16,849 INFO L137 encePairwiseOnDemand]: 158/164 looper letters, 236 selfloop transitions, 186 changer transitions 6/572 dead transitions. [2022-11-25 17:23:16,849 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 572 transitions, 13184 flow [2022-11-25 17:23:16,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:23:16,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 17:23:16,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 657 transitions. [2022-11-25 17:23:16,852 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5007621951219512 [2022-11-25 17:23:16,852 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 657 transitions. [2022-11-25 17:23:16,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 657 transitions. [2022-11-25 17:23:16,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:23:16,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 657 transitions. [2022-11-25 17:23:16,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 82.125) internal successors, (657), 8 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:16,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 164.0) internal successors, (1476), 9 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:16,857 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 164.0) internal successors, (1476), 9 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:16,857 INFO L175 Difference]: Start difference. First operand has 118 places, 434 transitions, 9891 flow. Second operand 8 states and 657 transitions. [2022-11-25 17:23:16,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 572 transitions, 13184 flow [2022-11-25 17:23:17,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 572 transitions, 12557 flow, removed 266 selfloop flow, removed 2 redundant places. [2022-11-25 17:23:17,981 INFO L231 Difference]: Finished difference. Result has 126 places, 516 transitions, 11823 flow [2022-11-25 17:23:17,981 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=9360, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11823, PETRI_PLACES=126, PETRI_TRANSITIONS=516} [2022-11-25 17:23:17,982 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 96 predicate places. [2022-11-25 17:23:17,982 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 516 transitions, 11823 flow [2022-11-25 17:23:17,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 78.0) internal successors, (702), 9 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:17,983 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:23:17,983 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:17,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:23:18,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 17:23:18,190 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:23:18,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:18,191 INFO L85 PathProgramCache]: Analyzing trace with hash 500937129, now seen corresponding path program 1 times [2022-11-25 17:23:18,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:18,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521810530] [2022-11-25 17:23:18,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:18,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:18,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:18,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:18,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:18,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521810530] [2022-11-25 17:23:18,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521810530] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:23:18,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118552819] [2022-11-25 17:23:18,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:18,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:18,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:23:18,466 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:23:18,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:23:18,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:18,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:23:18,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:23:19,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:19,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:23:19,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:19,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118552819] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:23:19,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:23:19,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-11-25 17:23:19,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082714962] [2022-11-25 17:23:19,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:23:19,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 17:23:19,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:19,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 17:23:19,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-11-25 17:23:19,665 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 164 [2022-11-25 17:23:19,667 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 516 transitions, 11823 flow. Second operand has 20 states, 20 states have (on average 71.5) internal successors, (1430), 20 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:19,667 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:23:19,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 164 [2022-11-25 17:23:19,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:23:32,846 INFO L130 PetriNetUnfolder]: 19787/31764 cut-off events. [2022-11-25 17:23:32,846 INFO L131 PetriNetUnfolder]: For 670507/670507 co-relation queries the response was YES. [2022-11-25 17:23:32,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257727 conditions, 31764 events. 19787/31764 cut-off events. For 670507/670507 co-relation queries the response was YES. Maximal size of possible extension queue 1549. Compared 243288 event pairs, 735 based on Foata normal form. 1826/33590 useless extension candidates. Maximal degree in co-relation 251534. Up to 8749 conditions per place. [2022-11-25 17:23:33,142 INFO L137 encePairwiseOnDemand]: 153/164 looper letters, 939 selfloop transitions, 1545 changer transitions 0/2484 dead transitions. [2022-11-25 17:23:33,142 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 2484 transitions, 54010 flow [2022-11-25 17:23:33,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-25 17:23:33,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-11-25 17:23:33,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 4494 transitions. [2022-11-25 17:23:33,154 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4893292682926829 [2022-11-25 17:23:33,154 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 4494 transitions. [2022-11-25 17:23:33,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 4494 transitions. [2022-11-25 17:23:33,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:23:33,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 4494 transitions. [2022-11-25 17:23:33,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 80.25) internal successors, (4494), 56 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:33,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 164.0) internal successors, (9348), 57 states have internal predecessors, (9348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:33,183 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 164.0) internal successors, (9348), 57 states have internal predecessors, (9348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:33,183 INFO L175 Difference]: Start difference. First operand has 126 places, 516 transitions, 11823 flow. Second operand 56 states and 4494 transitions. [2022-11-25 17:23:33,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 2484 transitions, 54010 flow [2022-11-25 17:23:38,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 2484 transitions, 53658 flow, removed 167 selfloop flow, removed 1 redundant places. [2022-11-25 17:23:38,498 INFO L231 Difference]: Finished difference. Result has 221 places, 1802 transitions, 45948 flow [2022-11-25 17:23:38,498 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=11579, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=378, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=45948, PETRI_PLACES=221, PETRI_TRANSITIONS=1802} [2022-11-25 17:23:38,499 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 191 predicate places. [2022-11-25 17:23:38,499 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 1802 transitions, 45948 flow [2022-11-25 17:23:38,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 71.5) internal successors, (1430), 20 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:38,500 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:23:38,500 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:38,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:23:38,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 17:23:38,708 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:23:38,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:38,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1653691963, now seen corresponding path program 2 times [2022-11-25 17:23:38,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:38,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103550145] [2022-11-25 17:23:38,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:38,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:38,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:38,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:38,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:38,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103550145] [2022-11-25 17:23:38,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103550145] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:23:38,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928333707] [2022-11-25 17:23:38,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:23:38,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:38,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:23:38,955 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:23:38,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40d8be3-60a3-462d-939c-471a56ec85b9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:23:39,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:23:39,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:23:39,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:23:39,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:23:39,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:39,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:23:39,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:39,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928333707] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:23:39,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:23:39,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 9] total 19 [2022-11-25 17:23:39,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932596033] [2022-11-25 17:23:39,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:23:39,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 17:23:39,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:39,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 17:23:39,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2022-11-25 17:23:39,834 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 164 [2022-11-25 17:23:39,836 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 1802 transitions, 45948 flow. Second operand has 20 states, 20 states have (on average 71.35) internal successors, (1427), 20 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:39,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:23:39,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 164 [2022-11-25 17:23:39,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand