./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2c_prepend_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-simple/sll2c_prepend_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3 --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 b49a64e91c004cffa5bc3361e3a67f33a01fced9 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 20:11:56,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:11:56,308 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:11:56,363 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:11:56,364 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:11:56,365 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:11:56,367 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:11:56,369 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:11:56,371 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:11:56,372 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:11:56,373 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:11:56,374 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:11:56,375 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:11:56,376 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:11:56,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:11:56,379 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:11:56,380 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:11:56,381 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:11:56,383 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:11:56,385 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:11:56,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:11:56,392 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:11:56,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:11:56,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:11:56,403 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:11:56,405 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:11:56,406 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:11:56,411 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:11:56,414 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:11:56,415 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:11:56,416 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:11:56,417 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:11:56,418 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:11:56,419 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:11:56,421 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:11:56,421 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:11:56,423 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:11:56,423 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:11:56,423 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:11:56,424 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:11:56,425 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:11:56,427 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 20:11:56,473 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:11:56,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:11:56,474 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:11:56,474 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:11:56,481 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:11:56,482 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:11:56,482 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:11:56,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:11:56,483 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:11:56,483 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:11:56,484 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:11:56,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:11:56,484 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 20:11:56,485 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:11:56,485 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 20:11:56,485 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:11:56,485 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:11:56,485 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:11:56,486 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 20:11:56,486 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:11:56,486 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:11:56,486 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:11:56,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:11:56,487 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:11:56,487 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:11:56,487 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 20:11:56,487 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:11:56,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:11:56,488 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 20:11:56,490 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 20:11:56,490 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 20:11:56,490 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:11:56,490 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b49a64e91c004cffa5bc3361e3a67f33a01fced9 [2021-10-15 20:11:56,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:11:56,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:11:56,780 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:11:56,781 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:11:56,782 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:11:56,782 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/list-simple/sll2c_prepend_unequal.i [2021-10-15 20:11:56,861 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/data/ab3d7fa1f/d57b166a02914f4bbea77ad042174ddd/FLAG89691ae89 [2021-10-15 20:11:57,378 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:11:57,379 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/sv-benchmarks/c/list-simple/sll2c_prepend_unequal.i [2021-10-15 20:11:57,392 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/data/ab3d7fa1f/d57b166a02914f4bbea77ad042174ddd/FLAG89691ae89 [2021-10-15 20:11:57,870 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/data/ab3d7fa1f/d57b166a02914f4bbea77ad042174ddd [2021-10-15 20:11:57,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:11:57,875 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:11:57,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:11:57,877 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:11:57,880 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:11:57,881 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:11:57" (1/1) ... [2021-10-15 20:11:57,882 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21c184af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:11:57, skipping insertion in model container [2021-10-15 20:11:57,882 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:11:57" (1/1) ... [2021-10-15 20:11:57,889 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:11:57,925 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:11:58,296 WARN L228 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_78d25c41-8194-4fd0-b7b0-90872bd84231/sv-benchmarks/c/list-simple/sll2c_prepend_unequal.i[24547,24560] [2021-10-15 20:11:58,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:11:58,316 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:11:58,354 WARN L228 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_78d25c41-8194-4fd0-b7b0-90872bd84231/sv-benchmarks/c/list-simple/sll2c_prepend_unequal.i[24547,24560] [2021-10-15 20:11:58,355 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:11:58,387 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:11:58,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:11:58 WrapperNode [2021-10-15 20:11:58,389 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:11:58,390 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:11:58,390 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:11:58,391 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:11:58,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:11:58" (1/1) ... [2021-10-15 20:11:58,414 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:11:58" (1/1) ... [2021-10-15 20:11:58,442 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:11:58,443 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:11:58,443 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:11:58,443 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:11:58,452 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:11:58" (1/1) ... [2021-10-15 20:11:58,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:11:58" (1/1) ... [2021-10-15 20:11:58,456 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:11:58" (1/1) ... [2021-10-15 20:11:58,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:11:58" (1/1) ... [2021-10-15 20:11:58,469 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:11:58" (1/1) ... [2021-10-15 20:11:58,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:11:58" (1/1) ... [2021-10-15 20:11:58,477 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:11:58" (1/1) ... [2021-10-15 20:11:58,481 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:11:58,482 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:11:58,482 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:11:58,482 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:11:58,483 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:11:58" (1/1) ... [2021-10-15 20:11:58,499 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:11:58,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:11:58,521 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:11:58,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:11:58,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-15 20:11:58,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-15 20:11:58,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-15 20:11:58,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-15 20:11:58,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:11:58,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-15 20:11:58,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 20:11:58,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-15 20:11:58,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:11:58,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:11:58,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:11:58,914 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:11:58,914 INFO L299 CfgBuilder]: Removed 26 assume(true) statements. [2021-10-15 20:11:58,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:11:58 BoogieIcfgContainer [2021-10-15 20:11:58,916 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:11:58,918 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:11:58,918 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:11:58,921 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:11:58,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:11:57" (1/3) ... [2021-10-15 20:11:58,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@109dadbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:11:58, skipping insertion in model container [2021-10-15 20:11:58,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:11:58" (2/3) ... [2021-10-15 20:11:58,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@109dadbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:11:58, skipping insertion in model container [2021-10-15 20:11:58,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:11:58" (3/3) ... [2021-10-15 20:11:58,924 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2c_prepend_unequal.i [2021-10-15 20:11:58,929 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:11:58,929 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 20:11:59,014 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:11:59,021 INFO L339 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, mConcurrency=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, mLoopAccelerationTechnique=FAST_UPR [2021-10-15 20:11:59,021 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 20:11:59,043 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 37 places, 52 transitions, 104 flow [2021-10-15 20:11:59,066 INFO L129 PetriNetUnfolder]: 16/52 cut-off events. [2021-10-15 20:11:59,067 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:11:59,068 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 52 events. 16/52 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 20:11:59,068 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 52 transitions, 104 flow [2021-10-15 20:11:59,072 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 35 transitions, 70 flow [2021-10-15 20:11:59,077 INFO L129 PetriNetUnfolder]: 5/26 cut-off events. [2021-10-15 20:11:59,077 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:11:59,077 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:11:59,078 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:11:59,079 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:11:59,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:11:59,084 INFO L82 PathProgramCache]: Analyzing trace with hash -41114111, now seen corresponding path program 1 times [2021-10-15 20:11:59,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:11:59,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746077559] [2021-10-15 20:11:59,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:11:59,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:11:59,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:11:59,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:11:59,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:11:59,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746077559] [2021-10-15 20:11:59,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746077559] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:11:59,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:11:59,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:11:59,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652521636] [2021-10-15 20:11:59,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:11:59,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:11:59,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:11:59,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:11:59,351 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 52 [2021-10-15 20:11:59,354 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 35 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:11:59,354 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:11:59,354 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 52 [2021-10-15 20:11:59,356 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:11:59,378 INFO L129 PetriNetUnfolder]: 6/36 cut-off events. [2021-10-15 20:11:59,379 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:11:59,380 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 36 events. 6/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 23 event pairs, 0 based on Foata normal form. 2/32 useless extension candidates. Maximal degree in co-relation 22. Up to 5 conditions per place. [2021-10-15 20:11:59,381 INFO L132 encePairwiseOnDemand]: 46/52 looper letters, 4 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2021-10-15 20:11:59,381 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 34 transitions, 80 flow [2021-10-15 20:11:59,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:11:59,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:11:59,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 140 transitions. [2021-10-15 20:11:59,394 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8974358974358975 [2021-10-15 20:11:59,395 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 140 transitions. [2021-10-15 20:11:59,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 140 transitions. [2021-10-15 20:11:59,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:11:59,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 140 transitions. [2021-10-15 20:11:59,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:11:59,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:11:59,408 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:11:59,410 INFO L186 Difference]: Start difference. First operand has 27 places, 35 transitions, 70 flow. Second operand 3 states and 140 transitions. [2021-10-15 20:11:59,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 34 transitions, 80 flow [2021-10-15 20:11:59,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 34 transitions, 80 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:11:59,416 INFO L242 Difference]: Finished difference. Result has 30 places, 33 transitions, 76 flow [2021-10-15 20:11:59,418 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=30, PETRI_TRANSITIONS=33} [2021-10-15 20:11:59,419 INFO L334 CegarLoopForPetriNet]: 27 programPoint places, 3 predicate places. [2021-10-15 20:11:59,419 INFO L470 AbstractCegarLoop]: Abstraction has has 30 places, 33 transitions, 76 flow [2021-10-15 20:11:59,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:11:59,420 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:11:59,420 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:11:59,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 20:11:59,420 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:11:59,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:11:59,422 INFO L82 PathProgramCache]: Analyzing trace with hash 778237257, now seen corresponding path program 1 times [2021-10-15 20:11:59,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:11:59,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947681964] [2021-10-15 20:11:59,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:11:59,423 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:11:59,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:11:59,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:11:59,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:11:59,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947681964] [2021-10-15 20:11:59,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947681964] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:11:59,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:11:59,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-15 20:11:59,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40461036] [2021-10-15 20:11:59,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 20:11:59,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:11:59,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 20:11:59,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-15 20:11:59,738 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2021-10-15 20:11:59,740 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 33 transitions, 76 flow. Second operand has 10 states, 10 states have (on average 18.6) internal successors, (186), 10 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:11:59,740 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:11:59,740 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2021-10-15 20:11:59,740 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:12:00,068 INFO L129 PetriNetUnfolder]: 5/35 cut-off events. [2021-10-15 20:12:00,068 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-10-15 20:12:00,069 INFO L84 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 35 events. 5/35 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 13 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 45. Up to 6 conditions per place. [2021-10-15 20:12:00,069 INFO L132 encePairwiseOnDemand]: 40/52 looper letters, 12 selfloop transitions, 11 changer transitions 0/32 dead transitions. [2021-10-15 20:12:00,069 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 32 transitions, 120 flow [2021-10-15 20:12:00,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 20:12:00,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 20:12:00,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2021-10-15 20:12:00,074 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.37115384615384617 [2021-10-15 20:12:00,075 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 193 transitions. [2021-10-15 20:12:00,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 193 transitions. [2021-10-15 20:12:00,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:12:00,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 193 transitions. [2021-10-15 20:12:00,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 19.3) internal successors, (193), 10 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:12:00,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 52.0) internal successors, (572), 11 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:12:00,081 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 52.0) internal successors, (572), 11 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:12:00,081 INFO L186 Difference]: Start difference. First operand has 30 places, 33 transitions, 76 flow. Second operand 10 states and 193 transitions. [2021-10-15 20:12:00,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 32 transitions, 120 flow [2021-10-15 20:12:00,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 32 transitions, 118 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:12:00,088 INFO L242 Difference]: Finished difference. Result has 38 places, 32 transitions, 94 flow [2021-10-15 20:12:00,088 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=94, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2021-10-15 20:12:00,089 INFO L334 CegarLoopForPetriNet]: 27 programPoint places, 11 predicate places. [2021-10-15 20:12:00,089 INFO L470 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 94 flow [2021-10-15 20:12:00,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.6) internal successors, (186), 10 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:12:00,090 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:12:00,091 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:12:00,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 20:12:00,091 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:12:00,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:12:00,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1681076194, now seen corresponding path program 1 times [2021-10-15 20:12:00,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:12:00,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778024130] [2021-10-15 20:12:00,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:12:00,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:12:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:12:00,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:12:00,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:12:00,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778024130] [2021-10-15 20:12:00,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778024130] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:12:00,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257620946] [2021-10-15 20:12:00,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:12:00,675 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:12:00,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:12:00,677 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:12:00,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 20:12:00,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:12:00,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 64 conjunts are in the unsatisfiable core [2021-10-15 20:12:00,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:12:00,858 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-15 20:12:00,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2021-10-15 20:12:01,129 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-10-15 20:12:01,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2021-10-15 20:12:01,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 20:12:01,549 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-15 20:12:01,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-10-15 20:12:01,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:01,719 INFO L354 Elim1Store]: treesize reduction 24, result has 46.7 percent of original size [2021-10-15 20:12:01,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 33 [2021-10-15 20:12:01,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:01,892 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-15 20:12:01,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 95 [2021-10-15 20:12:01,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:01,953 INFO L354 Elim1Store]: treesize reduction 190, result has 10.4 percent of original size [2021-10-15 20:12:01,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 64 [2021-10-15 20:12:02,268 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-15 20:12:02,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 42 [2021-10-15 20:12:02,426 INFO L354 Elim1Store]: treesize reduction 65, result has 5.8 percent of original size [2021-10-15 20:12:02,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 40 [2021-10-15 20:12:02,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:12:02,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257620946] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:12:02,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:12:02,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-10-15 20:12:02,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068698245] [2021-10-15 20:12:02,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-15 20:12:02,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:12:02,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-15 20:12:02,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-10-15 20:12:02,474 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2021-10-15 20:12:02,476 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 94 flow. Second operand has 26 states, 26 states have (on average 16.346153846153847) internal successors, (425), 26 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) [2021-10-15 20:12:02,477 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:12:02,477 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2021-10-15 20:12:02,477 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:12:05,402 INFO L129 PetriNetUnfolder]: 7/54 cut-off events. [2021-10-15 20:12:05,402 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-15 20:12:05,403 INFO L84 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 54 events. 7/54 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 45. Up to 6 conditions per place. [2021-10-15 20:12:05,403 INFO L132 encePairwiseOnDemand]: 37/52 looper letters, 17 selfloop transitions, 28 changer transitions 0/53 dead transitions. [2021-10-15 20:12:05,403 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 53 transitions, 248 flow [2021-10-15 20:12:05,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-15 20:12:05,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-10-15 20:12:05,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 437 transitions. [2021-10-15 20:12:05,408 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.32322485207100593 [2021-10-15 20:12:05,409 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 437 transitions. [2021-10-15 20:12:05,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 437 transitions. [2021-10-15 20:12:05,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:12:05,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 437 transitions. [2021-10-15 20:12:05,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 16.807692307692307) internal successors, (437), 26 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) [2021-10-15 20:12:05,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 52.0) internal successors, (1404), 27 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:12:05,418 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 52.0) internal successors, (1404), 27 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:12:05,419 INFO L186 Difference]: Start difference. First operand has 38 places, 32 transitions, 94 flow. Second operand 26 states and 437 transitions. [2021-10-15 20:12:05,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 53 transitions, 248 flow [2021-10-15 20:12:05,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 53 transitions, 206 flow, removed 0 selfloop flow, removed 9 redundant places. [2021-10-15 20:12:05,422 INFO L242 Difference]: Finished difference. Result has 58 places, 47 transitions, 180 flow [2021-10-15 20:12:05,423 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=180, PETRI_PLACES=58, PETRI_TRANSITIONS=47} [2021-10-15 20:12:05,423 INFO L334 CegarLoopForPetriNet]: 27 programPoint places, 31 predicate places. [2021-10-15 20:12:05,423 INFO L470 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 180 flow [2021-10-15 20:12:05,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 16.346153846153847) internal successors, (425), 26 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) [2021-10-15 20:12:05,424 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:12:05,424 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:12:05,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-15 20:12:05,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:12:05,639 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:12:05,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:12:05,640 INFO L82 PathProgramCache]: Analyzing trace with hash 2116280327, now seen corresponding path program 1 times [2021-10-15 20:12:05,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:12:05,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13545189] [2021-10-15 20:12:05,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:12:05,640 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:12:05,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:12:06,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:12:06,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:12:06,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13545189] [2021-10-15 20:12:06,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13545189] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:12:06,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710713597] [2021-10-15 20:12:06,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:12:06,442 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:12:06,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:12:06,447 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:12:06,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 20:12:06,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:12:06,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 92 conjunts are in the unsatisfiable core [2021-10-15 20:12:06,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:12:06,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:06,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-15 20:12:06,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:06,878 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-10-15 20:12:06,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-10-15 20:12:07,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 20:12:07,294 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-15 20:12:07,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 30 [2021-10-15 20:12:07,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:07,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:07,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:07,510 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-10-15 20:12:07,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 33 [2021-10-15 20:12:07,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:07,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:07,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2021-10-15 20:12:07,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 20:12:07,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:07,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:07,790 INFO L354 Elim1Store]: treesize reduction 106, result has 12.4 percent of original size [2021-10-15 20:12:07,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 87 treesize of output 55 [2021-10-15 20:12:08,893 INFO L354 Elim1Store]: treesize reduction 78, result has 16.1 percent of original size [2021-10-15 20:12:08,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 381 treesize of output 286 [2021-10-15 20:12:09,010 INFO L354 Elim1Store]: treesize reduction 272, result has 10.8 percent of original size [2021-10-15 20:12:09,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 277 treesize of output 147 [2021-10-15 20:12:09,070 INFO L354 Elim1Store]: treesize reduction 266, result has 10.1 percent of original size [2021-10-15 20:12:09,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 320 treesize of output 210 [2021-10-15 20:12:09,268 INFO L354 Elim1Store]: treesize reduction 52, result has 14.8 percent of original size [2021-10-15 20:12:09,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 159 treesize of output 80 [2021-10-15 20:12:09,286 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-10-15 20:12:09,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 45 [2021-10-15 20:12:09,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:12:09,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710713597] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:12:09,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:12:09,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-10-15 20:12:09,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583937771] [2021-10-15 20:12:09,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-15 20:12:09,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:12:09,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-15 20:12:09,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=855, Unknown=0, NotChecked=0, Total=930 [2021-10-15 20:12:09,302 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2021-10-15 20:12:09,303 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 47 transitions, 180 flow. Second operand has 31 states, 31 states have (on average 14.35483870967742) internal successors, (445), 31 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:12:09,303 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:12:09,303 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2021-10-15 20:12:09,304 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:12:15,229 INFO L129 PetriNetUnfolder]: 11/82 cut-off events. [2021-10-15 20:12:15,230 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2021-10-15 20:12:15,231 INFO L84 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 82 events. 11/82 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 144 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 100. Up to 10 conditions per place. [2021-10-15 20:12:15,231 INFO L132 encePairwiseOnDemand]: 34/52 looper letters, 28 selfloop transitions, 37 changer transitions 0/71 dead transitions. [2021-10-15 20:12:15,232 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 71 transitions, 398 flow [2021-10-15 20:12:15,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-15 20:12:15,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-10-15 20:12:15,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 482 transitions. [2021-10-15 20:12:15,240 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.28966346153846156 [2021-10-15 20:12:15,240 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 482 transitions. [2021-10-15 20:12:15,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 482 transitions. [2021-10-15 20:12:15,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:12:15,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 482 transitions. [2021-10-15 20:12:15,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 15.0625) internal successors, (482), 32 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:12:15,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 52.0) internal successors, (1716), 33 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:12:15,248 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 52.0) internal successors, (1716), 33 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:12:15,248 INFO L186 Difference]: Start difference. First operand has 58 places, 47 transitions, 180 flow. Second operand 32 states and 482 transitions. [2021-10-15 20:12:15,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 71 transitions, 398 flow [2021-10-15 20:12:15,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 71 transitions, 373 flow, removed 2 selfloop flow, removed 7 redundant places. [2021-10-15 20:12:15,253 INFO L242 Difference]: Finished difference. Result has 87 places, 57 transitions, 297 flow [2021-10-15 20:12:15,254 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=297, PETRI_PLACES=87, PETRI_TRANSITIONS=57} [2021-10-15 20:12:15,254 INFO L334 CegarLoopForPetriNet]: 27 programPoint places, 60 predicate places. [2021-10-15 20:12:15,254 INFO L470 AbstractCegarLoop]: Abstraction has has 87 places, 57 transitions, 297 flow [2021-10-15 20:12:15,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 14.35483870967742) internal successors, (445), 31 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:12:15,255 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:12:15,255 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:12:15,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 20:12:15,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:12:15,471 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:12:15,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:12:15,471 INFO L82 PathProgramCache]: Analyzing trace with hash -559342868, now seen corresponding path program 2 times [2021-10-15 20:12:15,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:12:15,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594567561] [2021-10-15 20:12:15,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:12:15,472 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:12:15,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:12:15,881 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:12:15,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:12:15,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594567561] [2021-10-15 20:12:15,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594567561] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:12:15,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393055411] [2021-10-15 20:12:15,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:12:15,882 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:12:15,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:12:15,887 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:12:15,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 20:12:16,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:12:16,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:12:16,180 WARN L261 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 113 conjunts are in the unsatisfiable core [2021-10-15 20:12:16,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:12:16,205 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-15 20:12:16,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2021-10-15 20:12:16,406 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-10-15 20:12:16,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2021-10-15 20:12:16,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 20:12:16,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 20:12:16,796 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-15 20:12:16,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-10-15 20:12:16,809 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-15 20:12:16,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-10-15 20:12:16,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:16,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:16,933 INFO L354 Elim1Store]: treesize reduction 24, result has 46.7 percent of original size [2021-10-15 20:12:16,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 33 [2021-10-15 20:12:17,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 20:12:17,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:17,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:17,145 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-10-15 20:12:17,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 125 treesize of output 89 [2021-10-15 20:12:17,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:17,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:17,176 INFO L354 Elim1Store]: treesize reduction 116, result has 18.9 percent of original size [2021-10-15 20:12:17,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 114 treesize of output 112 [2021-10-15 20:12:18,784 INFO L354 Elim1Store]: treesize reduction 614, result has 7.1 percent of original size [2021-10-15 20:12:18,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 23 case distinctions, treesize of input 506 treesize of output 255 [2021-10-15 20:12:18,874 INFO L354 Elim1Store]: treesize reduction 300, result has 9.9 percent of original size [2021-10-15 20:12:18,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 285 treesize of output 197 [2021-10-15 20:12:18,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 185 treesize of output 161 [2021-10-15 20:12:18,949 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-15 20:12:18,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 159 treesize of output 138 [2021-10-15 20:12:20,103 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-10-15 20:12:20,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 145 treesize of output 116 [2021-10-15 20:12:20,121 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-10-15 20:12:20,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 96 [2021-10-15 20:12:20,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:12:20,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393055411] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:12:20,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:12:20,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-10-15 20:12:20,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210830193] [2021-10-15 20:12:20,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-15 20:12:20,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:12:20,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-15 20:12:20,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-10-15 20:12:20,166 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2021-10-15 20:12:20,167 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 57 transitions, 297 flow. Second operand has 29 states, 29 states have (on average 14.620689655172415) internal successors, (424), 29 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:12:20,167 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:12:20,167 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2021-10-15 20:12:20,167 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:12:21,693 INFO L129 PetriNetUnfolder]: 9/77 cut-off events. [2021-10-15 20:12:21,693 INFO L130 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2021-10-15 20:12:21,694 INFO L84 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 77 events. 9/77 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 109 event pairs, 0 based on Foata normal form. 1/74 useless extension candidates. Maximal degree in co-relation 208. Up to 30 conditions per place. [2021-10-15 20:12:21,695 INFO L132 encePairwiseOnDemand]: 37/52 looper letters, 36 selfloop transitions, 21 changer transitions 0/63 dead transitions. [2021-10-15 20:12:21,695 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 63 transitions, 424 flow [2021-10-15 20:12:21,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-15 20:12:21,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-15 20:12:21,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 270 transitions. [2021-10-15 20:12:21,699 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3054298642533937 [2021-10-15 20:12:21,700 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 270 transitions. [2021-10-15 20:12:21,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 270 transitions. [2021-10-15 20:12:21,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:12:21,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 270 transitions. [2021-10-15 20:12:21,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 15.882352941176471) internal successors, (270), 17 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:12:21,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 52.0) internal successors, (936), 18 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:12:21,705 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 52.0) internal successors, (936), 18 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:12:21,705 INFO L186 Difference]: Start difference. First operand has 87 places, 57 transitions, 297 flow. Second operand 17 states and 270 transitions. [2021-10-15 20:12:21,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 63 transitions, 424 flow [2021-10-15 20:12:21,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 63 transitions, 363 flow, removed 6 selfloop flow, removed 21 redundant places. [2021-10-15 20:12:21,711 INFO L242 Difference]: Finished difference. Result has 83 places, 57 transitions, 289 flow [2021-10-15 20:12:21,711 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=289, PETRI_PLACES=83, PETRI_TRANSITIONS=57} [2021-10-15 20:12:21,712 INFO L334 CegarLoopForPetriNet]: 27 programPoint places, 56 predicate places. [2021-10-15 20:12:21,712 INFO L470 AbstractCegarLoop]: Abstraction has has 83 places, 57 transitions, 289 flow [2021-10-15 20:12:21,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 14.620689655172415) internal successors, (424), 29 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:12:21,713 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:12:21,713 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:12:21,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 20:12:21,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:12:21,935 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:12:21,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:12:21,935 INFO L82 PathProgramCache]: Analyzing trace with hash -2069082238, now seen corresponding path program 1 times [2021-10-15 20:12:21,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:12:21,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938539880] [2021-10-15 20:12:21,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:12:21,936 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:12:22,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:12:23,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:12:23,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:12:23,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938539880] [2021-10-15 20:12:23,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938539880] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:12:23,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406694626] [2021-10-15 20:12:23,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:12:23,026 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:12:23,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:12:23,031 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:12:23,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 20:12:23,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:12:23,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 98 conjunts are in the unsatisfiable core [2021-10-15 20:12:23,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:12:23,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:23,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:23,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2021-10-15 20:12:23,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:23,745 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-10-15 20:12:23,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-10-15 20:12:23,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 20:12:24,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-10-15 20:12:24,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 20:12:24,287 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-15 20:12:24,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 52 [2021-10-15 20:12:24,300 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-15 20:12:24,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 46 [2021-10-15 20:12:24,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:24,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:24,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:24,460 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-10-15 20:12:24,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 33 [2021-10-15 20:12:24,681 INFO L354 Elim1Store]: treesize reduction 108, result has 15.0 percent of original size [2021-10-15 20:12:24,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 147 treesize of output 150 [2021-10-15 20:12:24,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:24,729 INFO L354 Elim1Store]: treesize reduction 190, result has 10.4 percent of original size [2021-10-15 20:12:24,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 131 treesize of output 91 [2021-10-15 20:12:24,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:24,745 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-15 20:12:24,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 104 [2021-10-15 20:12:25,856 INFO L354 Elim1Store]: treesize reduction 173, result has 11.3 percent of original size [2021-10-15 20:12:25,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 385 treesize of output 297 [2021-10-15 20:12:26,001 INFO L354 Elim1Store]: treesize reduction 423, result has 10.9 percent of original size [2021-10-15 20:12:26,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 313 treesize of output 182 [2021-10-15 20:12:26,039 INFO L354 Elim1Store]: treesize reduction 112, result has 19.4 percent of original size [2021-10-15 20:12:26,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 285 treesize of output 236 [2021-10-15 20:12:26,071 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-15 20:12:26,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 190 [2021-10-15 20:12:26,569 INFO L354 Elim1Store]: treesize reduction 129, result has 5.8 percent of original size [2021-10-15 20:12:26,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 164 treesize of output 88 [2021-10-15 20:12:26,578 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-15 20:12:26,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 46 [2021-10-15 20:12:26,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-15 20:12:26,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:12:26,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406694626] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:12:26,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:12:26,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-10-15 20:12:26,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134727433] [2021-10-15 20:12:26,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-15 20:12:26,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:12:26,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-15 20:12:26,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1180, Unknown=0, NotChecked=0, Total=1260 [2021-10-15 20:12:26,689 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2021-10-15 20:12:26,689 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 57 transitions, 289 flow. Second operand has 36 states, 36 states have (on average 12.305555555555555) internal successors, (443), 36 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:12:26,689 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:12:26,690 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2021-10-15 20:12:26,690 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:12:30,144 INFO L129 PetriNetUnfolder]: 9/79 cut-off events. [2021-10-15 20:12:30,144 INFO L130 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2021-10-15 20:12:30,145 INFO L84 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 79 events. 9/79 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 125 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 215. Up to 35 conditions per place. [2021-10-15 20:12:30,146 INFO L132 encePairwiseOnDemand]: 34/52 looper letters, 41 selfloop transitions, 23 changer transitions 0/68 dead transitions. [2021-10-15 20:12:30,146 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 68 transitions, 439 flow [2021-10-15 20:12:30,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-15 20:12:30,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-15 20:12:30,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 265 transitions. [2021-10-15 20:12:30,148 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2682186234817814 [2021-10-15 20:12:30,148 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 265 transitions. [2021-10-15 20:12:30,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 265 transitions. [2021-10-15 20:12:30,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:12:30,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 265 transitions. [2021-10-15 20:12:30,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 13.947368421052632) internal successors, (265), 19 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) [2021-10-15 20:12:30,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 52.0) internal successors, (1040), 20 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:12:30,152 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 52.0) internal successors, (1040), 20 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:12:30,152 INFO L186 Difference]: Start difference. First operand has 83 places, 57 transitions, 289 flow. Second operand 19 states and 265 transitions. [2021-10-15 20:12:30,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 68 transitions, 439 flow [2021-10-15 20:12:30,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 68 transitions, 390 flow, removed 6 selfloop flow, removed 14 redundant places. [2021-10-15 20:12:30,158 INFO L242 Difference]: Finished difference. Result has 89 places, 59 transitions, 300 flow [2021-10-15 20:12:30,158 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=300, PETRI_PLACES=89, PETRI_TRANSITIONS=59} [2021-10-15 20:12:30,159 INFO L334 CegarLoopForPetriNet]: 27 programPoint places, 62 predicate places. [2021-10-15 20:12:30,159 INFO L470 AbstractCegarLoop]: Abstraction has has 89 places, 59 transitions, 300 flow [2021-10-15 20:12:30,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 12.305555555555555) internal successors, (443), 36 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:12:30,159 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:12:30,160 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:12:30,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 20:12:30,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:12:30,363 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:12:30,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:12:30,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1342570962, now seen corresponding path program 1 times [2021-10-15 20:12:30,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:12:30,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189109206] [2021-10-15 20:12:30,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:12:30,364 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:12:30,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:12:31,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:12:31,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:12:31,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189109206] [2021-10-15 20:12:31,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189109206] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:12:31,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242037879] [2021-10-15 20:12:31,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:12:31,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:12:31,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:12:31,242 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:12:31,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 20:12:31,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:12:31,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 98 conjunts are in the unsatisfiable core [2021-10-15 20:12:31,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:12:31,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 20:12:31,996 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-15 20:12:31,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-15 20:12:32,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:32,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:32,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2021-10-15 20:12:32,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:32,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:32,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2021-10-15 20:12:33,133 INFO L354 Elim1Store]: treesize reduction 289, result has 8.3 percent of original size [2021-10-15 20:12:33,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 350 treesize of output 192 [2021-10-15 20:12:33,192 INFO L354 Elim1Store]: treesize reduction 193, result has 10.2 percent of original size [2021-10-15 20:12:33,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 435 treesize of output 136 [2021-10-15 20:12:34,135 INFO L354 Elim1Store]: treesize reduction 216, result has 16.0 percent of original size [2021-10-15 20:12:34,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 249 treesize of output 148 [2021-10-15 20:12:34,173 INFO L354 Elim1Store]: treesize reduction 162, result has 4.1 percent of original size [2021-10-15 20:12:34,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 112 treesize of output 70 [2021-10-15 20:12:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:12:34,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242037879] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:12:34,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:12:34,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 39 [2021-10-15 20:12:34,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695620858] [2021-10-15 20:12:34,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-15 20:12:34,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:12:34,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-15 20:12:34,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1380, Unknown=0, NotChecked=0, Total=1482 [2021-10-15 20:12:34,259 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2021-10-15 20:12:34,259 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 59 transitions, 300 flow. Second operand has 39 states, 39 states have (on average 13.307692307692308) internal successors, (519), 39 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:12:34,260 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:12:34,260 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2021-10-15 20:12:34,260 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:12:47,886 INFO L129 PetriNetUnfolder]: 9/103 cut-off events. [2021-10-15 20:12:47,886 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-10-15 20:12:47,887 INFO L84 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 103 events. 9/103 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 191 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 246. Up to 16 conditions per place. [2021-10-15 20:12:47,887 INFO L132 encePairwiseOnDemand]: 31/52 looper letters, 32 selfloop transitions, 51 changer transitions 0/88 dead transitions. [2021-10-15 20:12:47,887 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 88 transitions, 548 flow [2021-10-15 20:12:47,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-10-15 20:12:47,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-10-15 20:12:47,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 576 transitions. [2021-10-15 20:12:47,892 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2701688555347092 [2021-10-15 20:12:47,892 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 576 transitions. [2021-10-15 20:12:47,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 576 transitions. [2021-10-15 20:12:47,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:12:47,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 576 transitions. [2021-10-15 20:12:47,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 14.048780487804878) internal successors, (576), 41 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:12:47,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 52.0) internal successors, (2184), 42 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:12:47,901 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 52.0) internal successors, (2184), 42 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:12:47,901 INFO L186 Difference]: Start difference. First operand has 89 places, 59 transitions, 300 flow. Second operand 41 states and 576 transitions. [2021-10-15 20:12:47,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 88 transitions, 548 flow [2021-10-15 20:12:47,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 88 transitions, 506 flow, removed 0 selfloop flow, removed 16 redundant places. [2021-10-15 20:12:47,907 INFO L242 Difference]: Finished difference. Result has 117 places, 77 transitions, 438 flow [2021-10-15 20:12:47,908 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=438, PETRI_PLACES=117, PETRI_TRANSITIONS=77} [2021-10-15 20:12:47,908 INFO L334 CegarLoopForPetriNet]: 27 programPoint places, 90 predicate places. [2021-10-15 20:12:47,908 INFO L470 AbstractCegarLoop]: Abstraction has has 117 places, 77 transitions, 438 flow [2021-10-15 20:12:47,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 13.307692307692308) internal successors, (519), 39 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:12:47,909 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:12:47,909 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:12:47,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 20:12:48,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:12:48,123 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:12:48,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:12:48,123 INFO L82 PathProgramCache]: Analyzing trace with hash -401477980, now seen corresponding path program 3 times [2021-10-15 20:12:48,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:12:48,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881969097] [2021-10-15 20:12:48,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:12:48,124 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:12:48,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:12:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-15 20:12:48,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:12:48,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881969097] [2021-10-15 20:12:48,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881969097] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:12:48,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652204532] [2021-10-15 20:12:48,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 20:12:48,172 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:12:48,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:12:48,173 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:12:48,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 20:12:48,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-15 20:12:48,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:12:48,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 20:12:48,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:12:49,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-15 20:12:49,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652204532] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:12:49,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:12:49,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-10-15 20:12:49,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912047022] [2021-10-15 20:12:49,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:12:49,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:12:49,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:12:49,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:12:49,044 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 52 [2021-10-15 20:12:49,044 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 77 transitions, 438 flow. Second operand has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:12:49,044 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:12:49,044 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 52 [2021-10-15 20:12:49,045 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:12:49,064 INFO L129 PetriNetUnfolder]: 2/45 cut-off events. [2021-10-15 20:12:49,064 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-10-15 20:12:49,065 INFO L84 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 45 events. 2/45 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 13 event pairs, 0 based on Foata normal form. 1/46 useless extension candidates. Maximal degree in co-relation 120. Up to 8 conditions per place. [2021-10-15 20:12:49,065 INFO L132 encePairwiseOnDemand]: 49/52 looper letters, 2 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2021-10-15 20:12:49,065 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 39 transitions, 217 flow [2021-10-15 20:12:49,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:12:49,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:12:49,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 177 transitions. [2021-10-15 20:12:49,067 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8509615384615384 [2021-10-15 20:12:49,067 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 177 transitions. [2021-10-15 20:12:49,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 177 transitions. [2021-10-15 20:12:49,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:12:49,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 177 transitions. [2021-10-15 20:12:49,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:12:49,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 52.0) internal successors, (260), 5 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:12:49,070 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 52.0) internal successors, (260), 5 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:12:49,070 INFO L186 Difference]: Start difference. First operand has 117 places, 77 transitions, 438 flow. Second operand 4 states and 177 transitions. [2021-10-15 20:12:49,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 39 transitions, 217 flow [2021-10-15 20:12:49,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 39 transitions, 143 flow, removed 2 selfloop flow, removed 33 redundant places. [2021-10-15 20:12:49,072 INFO L242 Difference]: Finished difference. Result has 52 places, 39 transitions, 139 flow [2021-10-15 20:12:49,073 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=139, PETRI_PLACES=52, PETRI_TRANSITIONS=39} [2021-10-15 20:12:49,073 INFO L334 CegarLoopForPetriNet]: 27 programPoint places, 25 predicate places. [2021-10-15 20:12:49,073 INFO L470 AbstractCegarLoop]: Abstraction has has 52 places, 39 transitions, 139 flow [2021-10-15 20:12:49,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:12:49,074 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:12:49,074 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:12:49,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 20:12:49,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:12:49,299 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:12:49,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:12:49,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1329931944, now seen corresponding path program 1 times [2021-10-15 20:12:49,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:12:49,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014089883] [2021-10-15 20:12:49,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:12:49,300 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:12:49,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:12:50,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:12:50,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:12:50,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014089883] [2021-10-15 20:12:50,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014089883] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:12:50,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586254759] [2021-10-15 20:12:50,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:12:50,554 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:12:50,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:12:50,555 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:12:50,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 20:12:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:12:51,011 WARN L261 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 133 conjunts are in the unsatisfiable core [2021-10-15 20:12:51,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:12:51,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:51,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:51,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2021-10-15 20:12:51,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 20:12:51,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:51,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:51,366 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-15 20:12:51,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-10-15 20:12:51,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 25 [2021-10-15 20:12:51,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 20:12:51,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 20:12:51,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-10-15 20:12:51,887 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-15 20:12:51,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 73 [2021-10-15 20:12:51,899 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-15 20:12:51,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 79 [2021-10-15 20:12:51,921 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-15 20:12:51,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 71 [2021-10-15 20:12:52,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:52,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:52,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:52,121 INFO L354 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2021-10-15 20:12:52,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 33 [2021-10-15 20:12:52,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:52,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:52,408 INFO L354 Elim1Store]: treesize reduction 106, result has 12.4 percent of original size [2021-10-15 20:12:52,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 191 treesize of output 135 [2021-10-15 20:12:52,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:52,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:52,442 INFO L354 Elim1Store]: treesize reduction 198, result has 12.0 percent of original size [2021-10-15 20:12:52,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 180 treesize of output 178 [2021-10-15 20:12:52,466 INFO L354 Elim1Store]: treesize reduction 41, result has 26.8 percent of original size [2021-10-15 20:12:52,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 157 treesize of output 160 [2021-10-15 20:12:54,172 INFO L354 Elim1Store]: treesize reduction 495, result has 6.8 percent of original size [2021-10-15 20:12:54,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 17 case distinctions, treesize of input 475 treesize of output 278 [2021-10-15 20:12:54,300 INFO L354 Elim1Store]: treesize reduction 1023, result has 5.2 percent of original size [2021-10-15 20:12:54,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 534 treesize of output 339 [2021-10-15 20:12:54,334 INFO L354 Elim1Store]: treesize reduction 142, result has 13.9 percent of original size [2021-10-15 20:12:54,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 373 treesize of output 259 [2021-10-15 20:12:55,160 INFO L354 Elim1Store]: treesize reduction 162, result has 8.5 percent of original size [2021-10-15 20:12:55,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 233 treesize of output 126 [2021-10-15 20:12:55,207 INFO L354 Elim1Store]: treesize reduction 142, result has 4.7 percent of original size [2021-10-15 20:12:55,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 85 treesize of output 65 [2021-10-15 20:12:55,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-15 20:12:55,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:12:55,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586254759] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:12:55,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:12:55,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2021-10-15 20:12:55,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043206318] [2021-10-15 20:12:55,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-15 20:12:55,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:12:55,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-15 20:12:55,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1437, Unknown=0, NotChecked=0, Total=1560 [2021-10-15 20:12:55,431 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2021-10-15 20:12:55,431 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 39 transitions, 139 flow. Second operand has 40 states, 40 states have (on average 13.325) internal successors, (533), 40 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:12:55,432 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:12:55,432 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2021-10-15 20:12:55,432 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:13:00,670 INFO L129 PetriNetUnfolder]: 1/42 cut-off events. [2021-10-15 20:13:00,670 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-10-15 20:13:00,670 INFO L84 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 42 events. 1/42 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 6 event pairs, 0 based on Foata normal form. 2/44 useless extension candidates. Maximal degree in co-relation 113. Up to 7 conditions per place. [2021-10-15 20:13:00,671 INFO L132 encePairwiseOnDemand]: 31/52 looper letters, 11 selfloop transitions, 26 changer transitions 0/41 dead transitions. [2021-10-15 20:13:00,671 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 41 transitions, 221 flow [2021-10-15 20:13:00,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-15 20:13:00,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-15 20:13:00,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 313 transitions. [2021-10-15 20:13:00,672 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2617056856187291 [2021-10-15 20:13:00,673 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 313 transitions. [2021-10-15 20:13:00,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 313 transitions. [2021-10-15 20:13:00,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:13:00,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 313 transitions. [2021-10-15 20:13:00,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 13.608695652173912) internal successors, (313), 23 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:13:00,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 52.0) internal successors, (1248), 24 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:13:00,678 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 52.0) internal successors, (1248), 24 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:13:00,678 INFO L186 Difference]: Start difference. First operand has 52 places, 39 transitions, 139 flow. Second operand 23 states and 313 transitions. [2021-10-15 20:13:00,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 41 transitions, 221 flow [2021-10-15 20:13:00,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 41 transitions, 214 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-10-15 20:13:00,681 INFO L242 Difference]: Finished difference. Result has 74 places, 41 transitions, 202 flow [2021-10-15 20:13:00,681 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=202, PETRI_PLACES=74, PETRI_TRANSITIONS=41} [2021-10-15 20:13:00,681 INFO L334 CegarLoopForPetriNet]: 27 programPoint places, 47 predicate places. [2021-10-15 20:13:00,681 INFO L470 AbstractCegarLoop]: Abstraction has has 74 places, 41 transitions, 202 flow [2021-10-15 20:13:00,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 13.325) internal successors, (533), 40 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:13:00,682 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:13:00,682 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:13:00,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-15 20:13:00,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-15 20:13:00,899 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:13:00,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:13:00,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1071652924, now seen corresponding path program 1 times [2021-10-15 20:13:00,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:13:00,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717563226] [2021-10-15 20:13:00,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:13:00,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:13:00,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:13:00,993 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-15 20:13:00,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:13:00,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717563226] [2021-10-15 20:13:00,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717563226] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:13:00,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113802050] [2021-10-15 20:13:00,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:13:00,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:13:00,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:13:00,996 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:13:01,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-15 20:13:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:13:01,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-15 20:13:01,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:13:01,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-15 20:13:01,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113802050] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:13:01,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:13:01,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-10-15 20:13:01,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288301004] [2021-10-15 20:13:01,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 20:13:01,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:13:01,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 20:13:01,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-15 20:13:01,956 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 52 [2021-10-15 20:13:01,957 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 41 transitions, 202 flow. Second operand has 9 states, 9 states have (on average 40.55555555555556) internal successors, (365), 9 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:13:01,957 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:13:01,957 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 52 [2021-10-15 20:13:01,957 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:13:02,002 INFO L129 PetriNetUnfolder]: 1/51 cut-off events. [2021-10-15 20:13:02,002 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2021-10-15 20:13:02,003 INFO L84 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 51 events. 1/51 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 1/52 useless extension candidates. Maximal degree in co-relation 147. Up to 7 conditions per place. [2021-10-15 20:13:02,003 INFO L132 encePairwiseOnDemand]: 47/52 looper letters, 6 selfloop transitions, 6 changer transitions 0/43 dead transitions. [2021-10-15 20:13:02,004 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 43 transitions, 240 flow [2021-10-15 20:13:02,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 20:13:02,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 20:13:02,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 284 transitions. [2021-10-15 20:13:02,010 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7802197802197802 [2021-10-15 20:13:02,010 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 284 transitions. [2021-10-15 20:13:02,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 284 transitions. [2021-10-15 20:13:02,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:13:02,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 284 transitions. [2021-10-15 20:13:02,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 40.57142857142857) internal successors, (284), 7 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:13:02,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 52.0) internal successors, (416), 8 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:13:02,013 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 52.0) internal successors, (416), 8 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:13:02,013 INFO L186 Difference]: Start difference. First operand has 74 places, 41 transitions, 202 flow. Second operand 7 states and 284 transitions. [2021-10-15 20:13:02,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 43 transitions, 240 flow [2021-10-15 20:13:02,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 43 transitions, 176 flow, removed 6 selfloop flow, removed 20 redundant places. [2021-10-15 20:13:02,016 INFO L242 Difference]: Finished difference. Result has 62 places, 43 transitions, 174 flow [2021-10-15 20:13:02,017 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=174, PETRI_PLACES=62, PETRI_TRANSITIONS=43} [2021-10-15 20:13:02,017 INFO L334 CegarLoopForPetriNet]: 27 programPoint places, 35 predicate places. [2021-10-15 20:13:02,018 INFO L470 AbstractCegarLoop]: Abstraction has has 62 places, 43 transitions, 174 flow [2021-10-15 20:13:02,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 40.55555555555556) internal successors, (365), 9 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:13:02,018 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:13:02,018 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:13:02,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-15 20:13:02,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-15 20:13:02,243 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:13:02,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:13:02,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1966154748, now seen corresponding path program 2 times [2021-10-15 20:13:02,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:13:02,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773002680] [2021-10-15 20:13:02,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:13:02,244 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:13:02,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:13:03,637 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-15 20:13:03,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:13:03,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773002680] [2021-10-15 20:13:03,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773002680] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:13:03,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217344285] [2021-10-15 20:13:03,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:13:03,638 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:13:03,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:13:03,643 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:13:03,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-15 20:13:04,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:13:04,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:13:04,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 107 conjunts are in the unsatisfiable core [2021-10-15 20:13:04,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:13:04,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 20:13:04,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 20:13:04,827 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-15 20:13:04,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 21 [2021-10-15 20:13:04,929 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-15 20:13:04,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-15 20:13:05,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:13:05,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:13:05,080 INFO L354 Elim1Store]: treesize reduction 91, result has 24.8 percent of original size [2021-10-15 20:13:05,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 59 treesize of output 62 [2021-10-15 20:13:05,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:13:05,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:13:05,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2021-10-15 20:13:06,357 INFO L354 Elim1Store]: treesize reduction 460, result has 13.4 percent of original size [2021-10-15 20:13:06,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 17 case distinctions, treesize of input 342 treesize of output 240 [2021-10-15 20:13:06,412 INFO L354 Elim1Store]: treesize reduction 193, result has 10.2 percent of original size [2021-10-15 20:13:06,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 240 treesize of output 159 [2021-10-15 20:13:08,259 INFO L354 Elim1Store]: treesize reduction 234, result has 10.3 percent of original size [2021-10-15 20:13:08,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 15 new quantified variables, introduced 21 case distinctions, treesize of input 324 treesize of output 170 [2021-10-15 20:13:08,311 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-10-15 20:13:08,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 119 treesize of output 76 [2021-10-15 20:13:08,382 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-15 20:13:08,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217344285] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:13:08,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:13:08,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 42 [2021-10-15 20:13:08,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386325835] [2021-10-15 20:13:08,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-10-15 20:13:08,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:13:08,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-10-15 20:13:08,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1564, Unknown=0, NotChecked=0, Total=1722 [2021-10-15 20:13:08,386 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2021-10-15 20:13:08,387 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 43 transitions, 174 flow. Second operand has 42 states, 42 states have (on average 13.5) internal successors, (567), 42 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:13:08,387 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:13:08,387 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2021-10-15 20:13:08,388 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:13:11,820 INFO L129 PetriNetUnfolder]: 0/31 cut-off events. [2021-10-15 20:13:11,820 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2021-10-15 20:13:11,820 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 31 events. 0/31 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 20:13:11,821 INFO L132 encePairwiseOnDemand]: 32/52 looper letters, 0 selfloop transitions, 0 changer transitions 31/31 dead transitions. [2021-10-15 20:13:11,821 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 31 transitions, 169 flow [2021-10-15 20:13:11,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-15 20:13:11,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-15 20:13:11,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 295 transitions. [2021-10-15 20:13:11,822 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.25786713286713286 [2021-10-15 20:13:11,822 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 295 transitions. [2021-10-15 20:13:11,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 295 transitions. [2021-10-15 20:13:11,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:13:11,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 295 transitions. [2021-10-15 20:13:11,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 13.409090909090908) internal successors, (295), 22 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:13:11,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 52.0) internal successors, (1196), 23 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:13:11,833 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 52.0) internal successors, (1196), 23 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:13:11,833 INFO L186 Difference]: Start difference. First operand has 62 places, 43 transitions, 174 flow. Second operand 22 states and 295 transitions. [2021-10-15 20:13:11,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 31 transitions, 169 flow [2021-10-15 20:13:11,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 31 transitions, 143 flow, removed 0 selfloop flow, removed 13 redundant places. [2021-10-15 20:13:11,836 INFO L242 Difference]: Finished difference. Result has 65 places, 0 transitions, 0 flow [2021-10-15 20:13:11,836 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=0, PETRI_PLACES=65, PETRI_TRANSITIONS=0} [2021-10-15 20:13:11,836 INFO L334 CegarLoopForPetriNet]: 27 programPoint places, 38 predicate places. [2021-10-15 20:13:11,836 INFO L470 AbstractCegarLoop]: Abstraction has has 65 places, 0 transitions, 0 flow [2021-10-15 20:13:11,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 13.5) internal successors, (567), 42 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:13:11,839 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:13:11,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-15 20:13:12,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-15 20:13:12,068 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:13:12,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:13:12 BoogieIcfgContainer [2021-10-15 20:13:12,073 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:13:12,073 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:13:12,073 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:13:12,073 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:13:12,074 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:11:58" (3/4) ... [2021-10-15 20:13:12,077 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 20:13:12,090 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-10-15 20:13:12,090 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-10-15 20:13:12,091 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:13:12,091 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:13:12,141 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 20:13:12,141 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:13:12,142 INFO L168 Benchmark]: Toolchain (without parser) took 74266.69 ms. Allocated memory was 100.7 MB in the beginning and 255.9 MB in the end (delta: 155.2 MB). Free memory was 61.0 MB in the beginning and 91.6 MB in the end (delta: -30.6 MB). Peak memory consumption was 123.6 MB. Max. memory is 16.1 GB. [2021-10-15 20:13:12,142 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 100.7 MB. Free memory is still 79.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:13:12,143 INFO L168 Benchmark]: CACSL2BoogieTranslator took 512.72 ms. Allocated memory is still 100.7 MB. Free memory was 60.8 MB in the beginning and 68.1 MB in the end (delta: -7.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 20:13:12,143 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.35 ms. Allocated memory is still 100.7 MB. Free memory was 68.1 MB in the beginning and 65.8 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:13:12,143 INFO L168 Benchmark]: Boogie Preprocessor took 38.42 ms. Allocated memory is still 100.7 MB. Free memory was 65.8 MB in the beginning and 64.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:13:12,144 INFO L168 Benchmark]: RCFGBuilder took 434.17 ms. Allocated memory is still 100.7 MB. Free memory was 63.7 MB in the beginning and 48.0 MB in the end (delta: 15.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-15 20:13:12,144 INFO L168 Benchmark]: TraceAbstraction took 73155.13 ms. Allocated memory was 100.7 MB in the beginning and 255.9 MB in the end (delta: 155.2 MB). Free memory was 47.3 MB in the beginning and 95.4 MB in the end (delta: -48.2 MB). Peak memory consumption was 109.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:13:12,145 INFO L168 Benchmark]: Witness Printer took 67.92 ms. Allocated memory is still 255.9 MB. Free memory was 95.4 MB in the beginning and 91.6 MB in the end (delta: 3.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:13:12,146 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 100.7 MB. Free memory is still 79.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 512.72 ms. Allocated memory is still 100.7 MB. Free memory was 60.8 MB in the beginning and 68.1 MB in the end (delta: -7.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.35 ms. Allocated memory is still 100.7 MB. Free memory was 68.1 MB in the beginning and 65.8 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.42 ms. Allocated memory is still 100.7 MB. Free memory was 65.8 MB in the beginning and 64.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 434.17 ms. Allocated memory is still 100.7 MB. Free memory was 63.7 MB in the beginning and 48.0 MB in the end (delta: 15.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 73155.13 ms. Allocated memory was 100.7 MB in the beginning and 255.9 MB in the end (delta: 155.2 MB). Free memory was 47.3 MB in the beginning and 95.4 MB in the end (delta: -48.2 MB). Peak memory consumption was 109.1 MB. Max. memory is 16.1 GB. * Witness Printer took 67.92 ms. Allocated memory is still 255.9 MB. Free memory was 95.4 MB in the beginning and 91.6 MB in the end (delta: 3.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 645]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 4.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 73057.0ms, OverallIterations: 11, TraceHistogramMax: 4, EmptinessCheckTime: 0.0ms, AutomataDifference: 36804.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 51.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 35 SDtfs, 1239 SDslu, 238 SDs, 0 SdLazy, 4602 SolverSat, 877 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 12563.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 567 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 413 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4076 ImplicationChecksByTransitivity, 33500.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=438occurred in iteration=7, InterpolantAutomatonStates: 204, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 192.5ms SsaConstructionTime, 1209.1ms SatisfiabilityAnalysisTime, 29393.1ms InterpolantComputationTime, 550 NumberOfCodeBlocks, 550 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 530 ConstructedInterpolants, 66 QuantifiedInterpolants, 24351 SizeOfPredicates, 267 NumberOfNonLiveVariables, 2050 ConjunctsInSsa, 719 ConjunctsInUnsatCore, 20 InterpolantComputations, 3 PerfectInterpolantSequences, 67/125 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 20:13:12,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78d25c41-8194-4fd0-b7b0-90872bd84231/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...