/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-05 21:02:59,343 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-05 21:02:59,349 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-05 21:02:59,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-05 21:02:59,389 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-05 21:02:59,390 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-05 21:02:59,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-05 21:02:59,393 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-05 21:02:59,394 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-05 21:02:59,395 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-05 21:02:59,396 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-05 21:02:59,397 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-05 21:02:59,397 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-05 21:02:59,398 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-05 21:02:59,399 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-05 21:02:59,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-05 21:02:59,402 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-05 21:02:59,406 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-05 21:02:59,410 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-05 21:02:59,415 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-05 21:02:59,416 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-05 21:02:59,419 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-05 21:02:59,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-05 21:02:59,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-05 21:02:59,424 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-12-05 21:02:59,430 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-05 21:02:59,435 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-05 21:02:59,436 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-05 21:02:59,437 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2022-12-05 21:02:59,472 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-05 21:02:59,472 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-05 21:02:59,474 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-05 21:02:59,474 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-05 21:02:59,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-05 21:02:59,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-05 21:02:59,475 INFO L138 SettingsManager]: * Use SBE=true [2022-12-05 21:02:59,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-05 21:02:59,476 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-05 21:02:59,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-05 21:02:59,476 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-05 21:02:59,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-05 21:02:59,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-05 21:02:59,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-05 21:02:59,477 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-05 21:02:59,477 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-05 21:02:59,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-05 21:02:59,477 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-05 21:02:59,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-05 21:02:59,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-05 21:02:59,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-05 21:02:59,478 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-05 21:02:59,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-05 21:02:59,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 21:02:59,478 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-05 21:02:59,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-05 21:02:59,479 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-05 21:02:59,479 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-05 21:02:59,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-05 21:02:59,479 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-05 21:02:59,479 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-05 21:02:59,766 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-05 21:02:59,781 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-05 21:02:59,783 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-05 21:02:59,784 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-05 21:02:59,784 INFO L275 PluginConnector]: CDTParser initialized [2022-12-05 21:02:59,785 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c [2022-12-05 21:03:00,921 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-05 21:03:01,093 INFO L351 CDTParser]: Found 1 translation units. [2022-12-05 21:03:01,094 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c [2022-12-05 21:03:01,099 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e4e0ce45/9b2f54985c6c4d08817597f7838a6340/FLAG8c036c306 [2022-12-05 21:03:01,117 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e4e0ce45/9b2f54985c6c4d08817597f7838a6340 [2022-12-05 21:03:01,130 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-05 21:03:01,131 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-05 21:03:01,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-05 21:03:01,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-05 21:03:01,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-05 21:03:01,135 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:03:01" (1/1) ... [2022-12-05 21:03:01,136 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@788f4ea7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:01, skipping insertion in model container [2022-12-05 21:03:01,136 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:03:01" (1/1) ... [2022-12-05 21:03:01,142 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-05 21:03:01,170 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-05 21:03:01,320 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c[3856,3869] [2022-12-05 21:03:01,331 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 21:03:01,338 INFO L203 MainTranslator]: Completed pre-run [2022-12-05 21:03:01,381 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c[3856,3869] [2022-12-05 21:03:01,385 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 21:03:01,402 INFO L208 MainTranslator]: Completed translation [2022-12-05 21:03:01,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:01 WrapperNode [2022-12-05 21:03:01,404 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-05 21:03:01,406 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-05 21:03:01,407 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-05 21:03:01,407 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-05 21:03:01,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:01" (1/1) ... [2022-12-05 21:03:01,429 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:01" (1/1) ... [2022-12-05 21:03:01,463 INFO L138 Inliner]: procedures = 25, calls = 34, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 214 [2022-12-05 21:03:01,464 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-05 21:03:01,465 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-05 21:03:01,465 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-05 21:03:01,465 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-05 21:03:01,473 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:01" (1/1) ... [2022-12-05 21:03:01,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:01" (1/1) ... [2022-12-05 21:03:01,486 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:01" (1/1) ... [2022-12-05 21:03:01,486 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:01" (1/1) ... [2022-12-05 21:03:01,492 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:01" (1/1) ... [2022-12-05 21:03:01,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:01" (1/1) ... [2022-12-05 21:03:01,514 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:01" (1/1) ... [2022-12-05 21:03:01,515 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:01" (1/1) ... [2022-12-05 21:03:01,517 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-05 21:03:01,518 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-05 21:03:01,518 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-05 21:03:01,518 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-05 21:03:01,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:01" (1/1) ... [2022-12-05 21:03:01,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 21:03:01,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:03:01,561 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-05 21:03:01,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-05 21:03:01,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-05 21:03:01,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-05 21:03:01,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-05 21:03:01,637 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-05 21:03:01,637 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-05 21:03:01,638 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-05 21:03:01,638 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-05 21:03:01,638 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-05 21:03:01,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-05 21:03:01,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-05 21:03:01,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-05 21:03:01,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-05 21:03:01,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-05 21:03:01,640 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-05 21:03:01,794 INFO L236 CfgBuilder]: Building ICFG [2022-12-05 21:03:01,796 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-05 21:03:02,087 INFO L277 CfgBuilder]: Performing block encoding [2022-12-05 21:03:02,097 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-05 21:03:02,097 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-05 21:03:02,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:03:02 BoogieIcfgContainer [2022-12-05 21:03:02,099 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-05 21:03:02,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-05 21:03:02,101 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-05 21:03:02,104 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-05 21:03:02,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:03:01" (1/3) ... [2022-12-05 21:03:02,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d656e11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:03:02, skipping insertion in model container [2022-12-05 21:03:02,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:01" (2/3) ... [2022-12-05 21:03:02,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d656e11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:03:02, skipping insertion in model container [2022-12-05 21:03:02,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:03:02" (3/3) ... [2022-12-05 21:03:02,106 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-symm.wvr.c [2022-12-05 21:03:02,121 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-05 21:03:02,121 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-05 21:03:02,121 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-05 21:03:02,243 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-05 21:03:02,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 235 places, 247 transitions, 510 flow [2022-12-05 21:03:02,362 INFO L130 PetriNetUnfolder]: 19/245 cut-off events. [2022-12-05 21:03:02,363 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 21:03:02,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 245 events. 19/245 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 443 event pairs, 0 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 160. Up to 2 conditions per place. [2022-12-05 21:03:02,370 INFO L82 GeneralOperation]: Start removeDead. Operand has 235 places, 247 transitions, 510 flow [2022-12-05 21:03:02,376 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 225 places, 237 transitions, 486 flow [2022-12-05 21:03:02,378 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 21:03:02,393 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 225 places, 237 transitions, 486 flow [2022-12-05 21:03:02,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 225 places, 237 transitions, 486 flow [2022-12-05 21:03:02,454 INFO L130 PetriNetUnfolder]: 19/237 cut-off events. [2022-12-05 21:03:02,454 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 21:03:02,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 237 events. 19/237 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 442 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 160. Up to 2 conditions per place. [2022-12-05 21:03:02,465 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 225 places, 237 transitions, 486 flow [2022-12-05 21:03:02,466 INFO L188 LiptonReduction]: Number of co-enabled transitions 9548 [2022-12-05 21:03:11,995 INFO L203 LiptonReduction]: Total number of compositions: 220 [2022-12-05 21:03:12,009 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-05 21:03:12,014 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@ae9997c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-05 21:03:12,014 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-05 21:03:12,019 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2022-12-05 21:03:12,019 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 21:03:12,019 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:03:12,020 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:03:12,020 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:03:12,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:03:12,024 INFO L85 PathProgramCache]: Analyzing trace with hash -177987541, now seen corresponding path program 1 times [2022-12-05 21:03:12,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:03:12,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828936936] [2022-12-05 21:03:12,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:03:12,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:03:12,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:03:12,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:03:12,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:03:12,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828936936] [2022-12-05 21:03:12,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828936936] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:03:12,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:03:12,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-05 21:03:12,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202553943] [2022-12-05 21:03:12,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:03:12,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-05 21:03:12,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:03:12,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-05 21:03:12,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-05 21:03:12,434 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:03:12,436 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:12,436 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:03:12,436 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:03:12,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:03:12,496 INFO L130 PetriNetUnfolder]: 41/76 cut-off events. [2022-12-05 21:03:12,496 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-12-05 21:03:12,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 76 events. 41/76 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 131 event pairs, 24 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2022-12-05 21:03:12,499 INFO L137 encePairwiseOnDemand]: 14/17 looper letters, 16 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2022-12-05 21:03:12,499 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 84 flow [2022-12-05 21:03:12,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-05 21:03:12,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-05 21:03:12,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 19 transitions. [2022-12-05 21:03:12,509 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.37254901960784315 [2022-12-05 21:03:12,511 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 19 transitions. [2022-12-05 21:03:12,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 84 flow [2022-12-05 21:03:12,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 76 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-05 21:03:12,515 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2022-12-05 21:03:12,517 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2022-12-05 21:03:12,520 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2022-12-05 21:03:12,520 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2022-12-05 21:03:12,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:12,521 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:03:12,521 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:03:12,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-05 21:03:12,522 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:03:12,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:03:12,523 INFO L85 PathProgramCache]: Analyzing trace with hash -747087740, now seen corresponding path program 1 times [2022-12-05 21:03:12,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:03:12,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721507277] [2022-12-05 21:03:12,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:03:12,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:03:12,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:03:12,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:03:12,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:03:12,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721507277] [2022-12-05 21:03:12,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721507277] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:03:12,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943791832] [2022-12-05 21:03:12,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:03:12,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:03:12,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:03:12,687 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:03:12,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-05 21:03:12,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:03:12,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-05 21:03:12,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:03:12,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:03:12,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:03:12,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:03:12,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943791832] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:03:12,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:03:12,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-05 21:03:12,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653740753] [2022-12-05 21:03:12,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:03:12,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-05 21:03:12,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:03:12,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-05 21:03:12,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-05 21:03:12,894 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:03:12,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:12,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:03:12,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:03:12,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:03:12,957 INFO L130 PetriNetUnfolder]: 41/78 cut-off events. [2022-12-05 21:03:12,957 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 21:03:12,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 78 events. 41/78 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 130 event pairs, 24 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 160. Up to 76 conditions per place. [2022-12-05 21:03:12,958 INFO L137 encePairwiseOnDemand]: 14/17 looper letters, 16 selfloop transitions, 4 changer transitions 0/20 dead transitions. [2022-12-05 21:03:12,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 20 transitions, 98 flow [2022-12-05 21:03:12,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 21:03:12,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 21:03:12,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 22 transitions. [2022-12-05 21:03:12,959 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.25882352941176473 [2022-12-05 21:03:12,959 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 22 transitions. [2022-12-05 21:03:12,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 20 transitions, 98 flow [2022-12-05 21:03:12,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 20 transitions, 94 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-05 21:03:12,960 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 72 flow [2022-12-05 21:03:12,961 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=72, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2022-12-05 21:03:12,961 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 4 predicate places. [2022-12-05 21:03:12,961 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 72 flow [2022-12-05 21:03:12,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:12,962 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:03:12,962 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:03:12,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-05 21:03:13,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:03:13,169 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:03:13,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:03:13,169 INFO L85 PathProgramCache]: Analyzing trace with hash 758658276, now seen corresponding path program 2 times [2022-12-05 21:03:13,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:03:13,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298880994] [2022-12-05 21:03:13,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:03:13,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:03:13,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:03:13,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:13,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:03:13,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298880994] [2022-12-05 21:03:13,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298880994] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:03:13,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:03:13,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-05 21:03:13,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304847097] [2022-12-05 21:03:13,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:03:13,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-05 21:03:13,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:03:13,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-05 21:03:13,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-05 21:03:13,692 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:03:13,692 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 72 flow. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:13,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:03:13,693 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:03:13,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:03:13,882 INFO L130 PetriNetUnfolder]: 71/141 cut-off events. [2022-12-05 21:03:13,882 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-05 21:03:13,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308 conditions, 141 events. 71/141 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 400 event pairs, 24 based on Foata normal form. 1/112 useless extension candidates. Maximal degree in co-relation 281. Up to 79 conditions per place. [2022-12-05 21:03:13,887 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 32 selfloop transitions, 3 changer transitions 8/43 dead transitions. [2022-12-05 21:03:13,887 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 43 transitions, 210 flow [2022-12-05 21:03:13,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 21:03:13,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 21:03:13,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 42 transitions. [2022-12-05 21:03:13,889 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.49411764705882355 [2022-12-05 21:03:13,889 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 72 flow. Second operand 5 states and 42 transitions. [2022-12-05 21:03:13,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 43 transitions, 210 flow [2022-12-05 21:03:13,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 43 transitions, 200 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-12-05 21:03:13,893 INFO L231 Difference]: Finished difference. Result has 31 places, 22 transitions, 86 flow [2022-12-05 21:03:13,893 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=86, PETRI_PLACES=31, PETRI_TRANSITIONS=22} [2022-12-05 21:03:13,894 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2022-12-05 21:03:13,894 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 22 transitions, 86 flow [2022-12-05 21:03:13,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:13,895 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:03:13,895 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:03:13,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-05 21:03:13,895 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:03:13,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:03:13,896 INFO L85 PathProgramCache]: Analyzing trace with hash 414215782, now seen corresponding path program 3 times [2022-12-05 21:03:13,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:03:13,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77648477] [2022-12-05 21:03:13,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:03:13,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:03:13,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:03:14,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:14,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:03:14,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77648477] [2022-12-05 21:03:14,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77648477] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:03:14,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:03:14,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-05 21:03:14,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304870540] [2022-12-05 21:03:14,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:03:14,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-05 21:03:14,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:03:14,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-05 21:03:14,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-05 21:03:14,357 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:03:14,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 22 transitions, 86 flow. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:14,357 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:03:14,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:03:14,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:03:14,537 INFO L130 PetriNetUnfolder]: 87/171 cut-off events. [2022-12-05 21:03:14,537 INFO L131 PetriNetUnfolder]: For 73/73 co-relation queries the response was YES. [2022-12-05 21:03:14,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 476 conditions, 171 events. 87/171 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 512 event pairs, 16 based on Foata normal form. 1/164 useless extension candidates. Maximal degree in co-relation 450. Up to 80 conditions per place. [2022-12-05 21:03:14,539 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 37 selfloop transitions, 6 changer transitions 2/45 dead transitions. [2022-12-05 21:03:14,539 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 45 transitions, 254 flow [2022-12-05 21:03:14,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 21:03:14,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 21:03:14,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 39 transitions. [2022-12-05 21:03:14,542 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4588235294117647 [2022-12-05 21:03:14,542 INFO L175 Difference]: Start difference. First operand has 31 places, 22 transitions, 86 flow. Second operand 5 states and 39 transitions. [2022-12-05 21:03:14,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 45 transitions, 254 flow [2022-12-05 21:03:14,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 45 transitions, 233 flow, removed 8 selfloop flow, removed 2 redundant places. [2022-12-05 21:03:14,546 INFO L231 Difference]: Finished difference. Result has 35 places, 27 transitions, 129 flow [2022-12-05 21:03:14,546 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=129, PETRI_PLACES=35, PETRI_TRANSITIONS=27} [2022-12-05 21:03:14,547 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2022-12-05 21:03:14,547 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 27 transitions, 129 flow [2022-12-05 21:03:14,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:14,548 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:03:14,548 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:03:14,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-05 21:03:14,549 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:03:14,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:03:14,550 INFO L85 PathProgramCache]: Analyzing trace with hash -828511396, now seen corresponding path program 4 times [2022-12-05 21:03:14,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:03:14,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639137456] [2022-12-05 21:03:14,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:03:14,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:03:14,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:03:14,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:14,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:03:14,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639137456] [2022-12-05 21:03:14,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639137456] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:03:14,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:03:14,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-05 21:03:14,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326029990] [2022-12-05 21:03:14,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:03:14,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-05 21:03:14,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:03:14,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-05 21:03:14,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-05 21:03:14,909 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:03:14,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 129 flow. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:14,909 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:03:14,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:03:14,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:03:15,049 INFO L130 PetriNetUnfolder]: 93/186 cut-off events. [2022-12-05 21:03:15,049 INFO L131 PetriNetUnfolder]: For 138/138 co-relation queries the response was YES. [2022-12-05 21:03:15,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 186 events. 93/186 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 580 event pairs, 24 based on Foata normal form. 1/151 useless extension candidates. Maximal degree in co-relation 550. Up to 83 conditions per place. [2022-12-05 21:03:15,051 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 41 selfloop transitions, 9 changer transitions 2/52 dead transitions. [2022-12-05 21:03:15,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 52 transitions, 319 flow [2022-12-05 21:03:15,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 21:03:15,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 21:03:15,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 45 transitions. [2022-12-05 21:03:15,052 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5294117647058824 [2022-12-05 21:03:15,052 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 129 flow. Second operand 5 states and 45 transitions. [2022-12-05 21:03:15,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 52 transitions, 319 flow [2022-12-05 21:03:15,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 52 transitions, 317 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-05 21:03:15,055 INFO L231 Difference]: Finished difference. Result has 40 places, 31 transitions, 180 flow [2022-12-05 21:03:15,055 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=180, PETRI_PLACES=40, PETRI_TRANSITIONS=31} [2022-12-05 21:03:15,055 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 19 predicate places. [2022-12-05 21:03:15,056 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 31 transitions, 180 flow [2022-12-05 21:03:15,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:15,056 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:03:15,056 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:03:15,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-05 21:03:15,056 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:03:15,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:03:15,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1527741288, now seen corresponding path program 5 times [2022-12-05 21:03:15,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:03:15,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078773961] [2022-12-05 21:03:15,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:03:15,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:03:15,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:03:15,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:15,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:03:15,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078773961] [2022-12-05 21:03:15,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078773961] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:03:15,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:03:15,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-05 21:03:15,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859806277] [2022-12-05 21:03:15,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:03:15,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-05 21:03:15,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:03:15,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-05 21:03:15,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-05 21:03:15,382 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:03:15,382 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 180 flow. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:15,382 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:03:15,382 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:03:15,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:03:15,527 INFO L130 PetriNetUnfolder]: 123/249 cut-off events. [2022-12-05 21:03:15,527 INFO L131 PetriNetUnfolder]: For 304/304 co-relation queries the response was YES. [2022-12-05 21:03:15,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 890 conditions, 249 events. 123/249 cut-off events. For 304/304 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 924 event pairs, 8 based on Foata normal form. 2/197 useless extension candidates. Maximal degree in co-relation 860. Up to 163 conditions per place. [2022-12-05 21:03:15,529 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 43 selfloop transitions, 10 changer transitions 5/58 dead transitions. [2022-12-05 21:03:15,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 58 transitions, 425 flow [2022-12-05 21:03:15,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 21:03:15,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 21:03:15,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 39 transitions. [2022-12-05 21:03:15,532 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4588235294117647 [2022-12-05 21:03:15,532 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 180 flow. Second operand 5 states and 39 transitions. [2022-12-05 21:03:15,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 58 transitions, 425 flow [2022-12-05 21:03:15,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 58 transitions, 392 flow, removed 13 selfloop flow, removed 1 redundant places. [2022-12-05 21:03:15,537 INFO L231 Difference]: Finished difference. Result has 46 places, 38 transitions, 255 flow [2022-12-05 21:03:15,537 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=255, PETRI_PLACES=46, PETRI_TRANSITIONS=38} [2022-12-05 21:03:15,539 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2022-12-05 21:03:15,539 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 38 transitions, 255 flow [2022-12-05 21:03:15,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:15,540 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:03:15,540 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:03:15,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-05 21:03:15,540 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:03:15,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:03:15,543 INFO L85 PathProgramCache]: Analyzing trace with hash 406728116, now seen corresponding path program 6 times [2022-12-05 21:03:15,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:03:15,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255649089] [2022-12-05 21:03:15,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:03:15,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:03:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:03:15,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:15,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:03:15,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255649089] [2022-12-05 21:03:15,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255649089] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:03:15,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:03:15,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-05 21:03:15,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154486003] [2022-12-05 21:03:15,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:03:15,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-05 21:03:15,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:03:15,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-05 21:03:15,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-05 21:03:15,854 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:03:15,854 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 38 transitions, 255 flow. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:15,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:03:15,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:03:15,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:03:16,047 INFO L130 PetriNetUnfolder]: 161/322 cut-off events. [2022-12-05 21:03:16,047 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2022-12-05 21:03:16,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1298 conditions, 322 events. 161/322 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1286 event pairs, 39 based on Foata normal form. 2/262 useless extension candidates. Maximal degree in co-relation 1265. Up to 194 conditions per place. [2022-12-05 21:03:16,049 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 53 selfloop transitions, 13 changer transitions 5/71 dead transitions. [2022-12-05 21:03:16,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 71 transitions, 588 flow [2022-12-05 21:03:16,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 21:03:16,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 21:03:16,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 43 transitions. [2022-12-05 21:03:16,051 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5058823529411764 [2022-12-05 21:03:16,051 INFO L175 Difference]: Start difference. First operand has 46 places, 38 transitions, 255 flow. Second operand 5 states and 43 transitions. [2022-12-05 21:03:16,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 71 transitions, 588 flow [2022-12-05 21:03:16,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 71 transitions, 578 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-05 21:03:16,055 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 375 flow [2022-12-05 21:03:16,056 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=375, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2022-12-05 21:03:16,056 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 30 predicate places. [2022-12-05 21:03:16,056 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 375 flow [2022-12-05 21:03:16,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:16,056 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:03:16,058 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:03:16,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-05 21:03:16,063 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:03:16,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:03:16,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1595185479, now seen corresponding path program 1 times [2022-12-05 21:03:16,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:03:16,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954116687] [2022-12-05 21:03:16,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:03:16,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:03:16,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:03:16,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:16,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:03:16,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954116687] [2022-12-05 21:03:16,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954116687] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:03:16,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:03:16,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-05 21:03:16,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845138348] [2022-12-05 21:03:16,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:03:16,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 21:03:16,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:03:16,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 21:03:16,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-05 21:03:16,309 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:03:16,309 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 375 flow. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:16,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:03:16,309 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:03:16,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:03:16,440 INFO L130 PetriNetUnfolder]: 164/326 cut-off events. [2022-12-05 21:03:16,441 INFO L131 PetriNetUnfolder]: For 1071/1071 co-relation queries the response was YES. [2022-12-05 21:03:16,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1543 conditions, 326 events. 164/326 cut-off events. For 1071/1071 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1291 event pairs, 24 based on Foata normal form. 6/302 useless extension candidates. Maximal degree in co-relation 1508. Up to 152 conditions per place. [2022-12-05 21:03:16,444 INFO L137 encePairwiseOnDemand]: 12/17 looper letters, 60 selfloop transitions, 10 changer transitions 0/70 dead transitions. [2022-12-05 21:03:16,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 70 transitions, 669 flow [2022-12-05 21:03:16,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 21:03:16,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 21:03:16,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 42 transitions. [2022-12-05 21:03:16,447 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.49411764705882355 [2022-12-05 21:03:16,447 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 375 flow. Second operand 5 states and 42 transitions. [2022-12-05 21:03:16,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 70 transitions, 669 flow [2022-12-05 21:03:16,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 70 transitions, 657 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-12-05 21:03:16,452 INFO L231 Difference]: Finished difference. Result has 56 places, 47 transitions, 406 flow [2022-12-05 21:03:16,452 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=406, PETRI_PLACES=56, PETRI_TRANSITIONS=47} [2022-12-05 21:03:16,455 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 35 predicate places. [2022-12-05 21:03:16,455 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 47 transitions, 406 flow [2022-12-05 21:03:16,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:16,455 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:03:16,455 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:03:16,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-05 21:03:16,456 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:03:16,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:03:16,456 INFO L85 PathProgramCache]: Analyzing trace with hash -203322707, now seen corresponding path program 2 times [2022-12-05 21:03:16,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:03:16,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161409101] [2022-12-05 21:03:16,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:03:16,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:03:16,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:03:16,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:16,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:03:16,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161409101] [2022-12-05 21:03:16,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161409101] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:03:16,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:03:16,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-05 21:03:16,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098106559] [2022-12-05 21:03:16,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:03:16,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 21:03:16,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:03:16,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 21:03:16,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-05 21:03:16,667 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:03:16,667 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 406 flow. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:16,667 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:03:16,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:03:16,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:03:16,771 INFO L130 PetriNetUnfolder]: 157/317 cut-off events. [2022-12-05 21:03:16,771 INFO L131 PetriNetUnfolder]: For 1302/1302 co-relation queries the response was YES. [2022-12-05 21:03:16,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1551 conditions, 317 events. 157/317 cut-off events. For 1302/1302 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1265 event pairs, 18 based on Foata normal form. 2/293 useless extension candidates. Maximal degree in co-relation 1514. Up to 192 conditions per place. [2022-12-05 21:03:16,774 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 50 selfloop transitions, 14 changer transitions 2/66 dead transitions. [2022-12-05 21:03:16,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 66 transitions, 688 flow [2022-12-05 21:03:16,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 21:03:16,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 21:03:16,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 36 transitions. [2022-12-05 21:03:16,775 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4235294117647059 [2022-12-05 21:03:16,775 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 406 flow. Second operand 5 states and 36 transitions. [2022-12-05 21:03:16,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 66 transitions, 688 flow [2022-12-05 21:03:16,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 66 transitions, 654 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-12-05 21:03:16,780 INFO L231 Difference]: Finished difference. Result has 59 places, 50 transitions, 473 flow [2022-12-05 21:03:16,780 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=473, PETRI_PLACES=59, PETRI_TRANSITIONS=50} [2022-12-05 21:03:16,781 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 38 predicate places. [2022-12-05 21:03:16,781 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 50 transitions, 473 flow [2022-12-05 21:03:16,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:16,781 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:03:16,781 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:03:16,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-05 21:03:16,782 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:03:16,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:03:16,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1918693183, now seen corresponding path program 3 times [2022-12-05 21:03:16,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:03:16,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452707440] [2022-12-05 21:03:16,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:03:16,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:03:16,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:03:16,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:16,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:03:16,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452707440] [2022-12-05 21:03:16,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452707440] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:03:16,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:03:16,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-05 21:03:16,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238380271] [2022-12-05 21:03:16,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:03:16,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 21:03:16,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:03:16,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 21:03:16,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-05 21:03:16,991 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:03:16,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 473 flow. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:16,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:03:16,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:03:16,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:03:17,118 INFO L130 PetriNetUnfolder]: 160/313 cut-off events. [2022-12-05 21:03:17,118 INFO L131 PetriNetUnfolder]: For 1422/1422 co-relation queries the response was YES. [2022-12-05 21:03:17,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1618 conditions, 313 events. 160/313 cut-off events. For 1422/1422 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1193 event pairs, 16 based on Foata normal form. 2/307 useless extension candidates. Maximal degree in co-relation 1580. Up to 246 conditions per place. [2022-12-05 21:03:17,121 INFO L137 encePairwiseOnDemand]: 12/17 looper letters, 50 selfloop transitions, 16 changer transitions 1/67 dead transitions. [2022-12-05 21:03:17,121 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 67 transitions, 718 flow [2022-12-05 21:03:17,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 21:03:17,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 21:03:17,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 37 transitions. [2022-12-05 21:03:17,122 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.43529411764705883 [2022-12-05 21:03:17,122 INFO L175 Difference]: Start difference. First operand has 59 places, 50 transitions, 473 flow. Second operand 5 states and 37 transitions. [2022-12-05 21:03:17,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 67 transitions, 718 flow [2022-12-05 21:03:17,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 67 transitions, 691 flow, removed 12 selfloop flow, removed 1 redundant places. [2022-12-05 21:03:17,128 INFO L231 Difference]: Finished difference. Result has 63 places, 53 transitions, 531 flow [2022-12-05 21:03:17,128 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=531, PETRI_PLACES=63, PETRI_TRANSITIONS=53} [2022-12-05 21:03:17,128 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 42 predicate places. [2022-12-05 21:03:17,129 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 53 transitions, 531 flow [2022-12-05 21:03:17,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:17,129 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:03:17,129 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:03:17,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-05 21:03:17,129 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:03:17,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:03:17,130 INFO L85 PathProgramCache]: Analyzing trace with hash -975386263, now seen corresponding path program 1 times [2022-12-05 21:03:17,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:03:17,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45239767] [2022-12-05 21:03:17,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:03:17,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:03:17,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:03:17,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:17,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:03:17,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45239767] [2022-12-05 21:03:17,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45239767] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:03:17,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:03:17,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-05 21:03:17,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283712236] [2022-12-05 21:03:17,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:03:17,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 21:03:17,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:03:17,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 21:03:17,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-05 21:03:17,301 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:03:17,301 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 53 transitions, 531 flow. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:17,302 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:03:17,302 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:03:17,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:03:17,424 INFO L130 PetriNetUnfolder]: 144/291 cut-off events. [2022-12-05 21:03:17,424 INFO L131 PetriNetUnfolder]: For 1528/1528 co-relation queries the response was YES. [2022-12-05 21:03:17,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1545 conditions, 291 events. 144/291 cut-off events. For 1528/1528 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1118 event pairs, 40 based on Foata normal form. 4/291 useless extension candidates. Maximal degree in co-relation 1506. Up to 178 conditions per place. [2022-12-05 21:03:17,427 INFO L137 encePairwiseOnDemand]: 12/17 looper letters, 59 selfloop transitions, 10 changer transitions 1/70 dead transitions. [2022-12-05 21:03:17,427 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 70 transitions, 753 flow [2022-12-05 21:03:17,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 21:03:17,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 21:03:17,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 41 transitions. [2022-12-05 21:03:17,428 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4823529411764706 [2022-12-05 21:03:17,428 INFO L175 Difference]: Start difference. First operand has 63 places, 53 transitions, 531 flow. Second operand 5 states and 41 transitions. [2022-12-05 21:03:17,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 70 transitions, 753 flow [2022-12-05 21:03:17,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 70 transitions, 709 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-12-05 21:03:17,434 INFO L231 Difference]: Finished difference. Result has 62 places, 50 transitions, 476 flow [2022-12-05 21:03:17,434 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=476, PETRI_PLACES=62, PETRI_TRANSITIONS=50} [2022-12-05 21:03:17,434 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 41 predicate places. [2022-12-05 21:03:17,435 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 50 transitions, 476 flow [2022-12-05 21:03:17,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:17,435 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:03:17,435 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:03:17,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-05 21:03:17,435 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:03:17,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:03:17,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1359627621, now seen corresponding path program 2 times [2022-12-05 21:03:17,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:03:17,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322871728] [2022-12-05 21:03:17,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:03:17,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:03:17,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:03:17,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:17,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:03:17,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322871728] [2022-12-05 21:03:17,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322871728] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:03:17,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:03:17,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-05 21:03:17,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705585893] [2022-12-05 21:03:17,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:03:17,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 21:03:17,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:03:17,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 21:03:17,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-05 21:03:17,616 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:03:17,616 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 50 transitions, 476 flow. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:17,616 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:03:17,616 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:03:17,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:03:17,729 INFO L130 PetriNetUnfolder]: 138/266 cut-off events. [2022-12-05 21:03:17,730 INFO L131 PetriNetUnfolder]: For 1248/1248 co-relation queries the response was YES. [2022-12-05 21:03:17,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1391 conditions, 266 events. 138/266 cut-off events. For 1248/1248 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 931 event pairs, 38 based on Foata normal form. 4/266 useless extension candidates. Maximal degree in co-relation 1353. Up to 178 conditions per place. [2022-12-05 21:03:17,732 INFO L137 encePairwiseOnDemand]: 12/17 looper letters, 53 selfloop transitions, 10 changer transitions 0/63 dead transitions. [2022-12-05 21:03:17,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 63 transitions, 668 flow [2022-12-05 21:03:17,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 21:03:17,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 21:03:17,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 37 transitions. [2022-12-05 21:03:17,734 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.43529411764705883 [2022-12-05 21:03:17,734 INFO L175 Difference]: Start difference. First operand has 62 places, 50 transitions, 476 flow. Second operand 5 states and 37 transitions. [2022-12-05 21:03:17,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 63 transitions, 668 flow [2022-12-05 21:03:17,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 63 transitions, 624 flow, removed 13 selfloop flow, removed 4 redundant places. [2022-12-05 21:03:17,738 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 446 flow [2022-12-05 21:03:17,738 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=446, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2022-12-05 21:03:17,739 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 39 predicate places. [2022-12-05 21:03:17,739 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 446 flow [2022-12-05 21:03:17,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:17,739 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:03:17,739 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:03:17,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-05 21:03:17,740 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:03:17,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:03:17,740 INFO L85 PathProgramCache]: Analyzing trace with hash -395647473, now seen corresponding path program 4 times [2022-12-05 21:03:17,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:03:17,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488252629] [2022-12-05 21:03:17,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:03:17,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:03:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:03:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:17,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:03:17,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488252629] [2022-12-05 21:03:17,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488252629] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:03:17,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:03:17,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-05 21:03:17,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682014482] [2022-12-05 21:03:17,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:03:17,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 21:03:17,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:03:17,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 21:03:17,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-05 21:03:17,892 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:03:17,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 446 flow. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:17,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:03:17,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:03:17,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:03:17,999 INFO L130 PetriNetUnfolder]: 136/264 cut-off events. [2022-12-05 21:03:18,000 INFO L131 PetriNetUnfolder]: For 1159/1159 co-relation queries the response was YES. [2022-12-05 21:03:18,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1323 conditions, 264 events. 136/264 cut-off events. For 1159/1159 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 923 event pairs, 29 based on Foata normal form. 2/262 useless extension candidates. Maximal degree in co-relation 1286. Up to 167 conditions per place. [2022-12-05 21:03:18,002 INFO L137 encePairwiseOnDemand]: 12/17 looper letters, 47 selfloop transitions, 15 changer transitions 7/69 dead transitions. [2022-12-05 21:03:18,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 69 transitions, 718 flow [2022-12-05 21:03:18,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 21:03:18,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 21:03:18,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 39 transitions. [2022-12-05 21:03:18,003 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4588235294117647 [2022-12-05 21:03:18,003 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 446 flow. Second operand 5 states and 39 transitions. [2022-12-05 21:03:18,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 69 transitions, 718 flow [2022-12-05 21:03:18,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 69 transitions, 692 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-12-05 21:03:18,008 INFO L231 Difference]: Finished difference. Result has 64 places, 48 transitions, 476 flow [2022-12-05 21:03:18,008 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=476, PETRI_PLACES=64, PETRI_TRANSITIONS=48} [2022-12-05 21:03:18,008 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 43 predicate places. [2022-12-05 21:03:18,008 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 48 transitions, 476 flow [2022-12-05 21:03:18,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:18,009 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:03:18,009 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:03:18,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-05 21:03:18,009 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:03:18,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:03:18,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1794059739, now seen corresponding path program 3 times [2022-12-05 21:03:18,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:03:18,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120985329] [2022-12-05 21:03:18,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:03:18,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:03:18,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:03:18,172 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:18,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:03:18,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120985329] [2022-12-05 21:03:18,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120985329] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:03:18,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:03:18,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-05 21:03:18,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422371987] [2022-12-05 21:03:18,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:03:18,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 21:03:18,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:03:18,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 21:03:18,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-05 21:03:18,174 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:03:18,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 48 transitions, 476 flow. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:18,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:03:18,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:03:18,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:03:18,274 INFO L130 PetriNetUnfolder]: 138/267 cut-off events. [2022-12-05 21:03:18,274 INFO L131 PetriNetUnfolder]: For 1320/1320 co-relation queries the response was YES. [2022-12-05 21:03:18,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1412 conditions, 267 events. 138/267 cut-off events. For 1320/1320 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 938 event pairs, 13 based on Foata normal form. 4/267 useless extension candidates. Maximal degree in co-relation 1372. Up to 157 conditions per place. [2022-12-05 21:03:18,277 INFO L137 encePairwiseOnDemand]: 12/17 looper letters, 57 selfloop transitions, 13 changer transitions 0/70 dead transitions. [2022-12-05 21:03:18,277 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 70 transitions, 742 flow [2022-12-05 21:03:18,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 21:03:18,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 21:03:18,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 41 transitions. [2022-12-05 21:03:18,278 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4823529411764706 [2022-12-05 21:03:18,278 INFO L175 Difference]: Start difference. First operand has 64 places, 48 transitions, 476 flow. Second operand 5 states and 41 transitions. [2022-12-05 21:03:18,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 70 transitions, 742 flow [2022-12-05 21:03:18,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 70 transitions, 711 flow, removed 8 selfloop flow, removed 2 redundant places. [2022-12-05 21:03:18,283 INFO L231 Difference]: Finished difference. Result has 67 places, 51 transitions, 520 flow [2022-12-05 21:03:18,283 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=520, PETRI_PLACES=67, PETRI_TRANSITIONS=51} [2022-12-05 21:03:18,284 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 46 predicate places. [2022-12-05 21:03:18,284 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 51 transitions, 520 flow [2022-12-05 21:03:18,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:18,284 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:03:18,284 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:03:18,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-05 21:03:18,285 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:03:18,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:03:18,285 INFO L85 PathProgramCache]: Analyzing trace with hash 231109411, now seen corresponding path program 5 times [2022-12-05 21:03:18,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:03:18,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084496919] [2022-12-05 21:03:18,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:03:18,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:03:18,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:03:18,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:18,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:03:18,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084496919] [2022-12-05 21:03:18,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084496919] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:03:18,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:03:18,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-05 21:03:18,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877312337] [2022-12-05 21:03:18,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:03:18,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 21:03:18,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:03:18,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 21:03:18,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-05 21:03:18,458 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:03:18,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 51 transitions, 520 flow. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:18,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:03:18,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:03:18,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:03:18,594 INFO L130 PetriNetUnfolder]: 131/258 cut-off events. [2022-12-05 21:03:18,594 INFO L131 PetriNetUnfolder]: For 1574/1574 co-relation queries the response was YES. [2022-12-05 21:03:18,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1391 conditions, 258 events. 131/258 cut-off events. For 1574/1574 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 902 event pairs, 24 based on Foata normal form. 4/262 useless extension candidates. Maximal degree in co-relation 1350. Up to 93 conditions per place. [2022-12-05 21:03:18,597 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 44 selfloop transitions, 23 changer transitions 1/68 dead transitions. [2022-12-05 21:03:18,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 68 transitions, 755 flow [2022-12-05 21:03:18,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-05 21:03:18,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-05 21:03:18,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 42 transitions. [2022-12-05 21:03:18,598 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2022-12-05 21:03:18,598 INFO L175 Difference]: Start difference. First operand has 67 places, 51 transitions, 520 flow. Second operand 6 states and 42 transitions. [2022-12-05 21:03:18,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 68 transitions, 755 flow [2022-12-05 21:03:18,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 68 transitions, 740 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-05 21:03:18,604 INFO L231 Difference]: Finished difference. Result has 69 places, 52 transitions, 564 flow [2022-12-05 21:03:18,604 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=564, PETRI_PLACES=69, PETRI_TRANSITIONS=52} [2022-12-05 21:03:18,605 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 48 predicate places. [2022-12-05 21:03:18,605 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 52 transitions, 564 flow [2022-12-05 21:03:18,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:18,605 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:03:18,605 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:03:18,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-05 21:03:18,605 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:03:18,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:03:18,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1484261065, now seen corresponding path program 6 times [2022-12-05 21:03:18,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:03:18,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344209181] [2022-12-05 21:03:18,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:03:18,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:03:18,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:03:18,791 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:18,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:03:18,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344209181] [2022-12-05 21:03:18,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344209181] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:03:18,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:03:18,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-05 21:03:18,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985017949] [2022-12-05 21:03:18,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:03:18,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 21:03:18,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:03:18,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 21:03:18,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-05 21:03:18,793 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:03:18,793 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 52 transitions, 564 flow. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:18,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:03:18,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:03:18,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:03:18,880 INFO L130 PetriNetUnfolder]: 129/247 cut-off events. [2022-12-05 21:03:18,880 INFO L131 PetriNetUnfolder]: For 1685/1685 co-relation queries the response was YES. [2022-12-05 21:03:18,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1412 conditions, 247 events. 129/247 cut-off events. For 1685/1685 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 840 event pairs, 36 based on Foata normal form. 2/249 useless extension candidates. Maximal degree in co-relation 1372. Up to 186 conditions per place. [2022-12-05 21:03:18,883 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 43 selfloop transitions, 20 changer transitions 1/64 dead transitions. [2022-12-05 21:03:18,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 64 transitions, 747 flow [2022-12-05 21:03:18,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 21:03:18,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 21:03:18,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 38 transitions. [2022-12-05 21:03:18,884 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4470588235294118 [2022-12-05 21:03:18,884 INFO L175 Difference]: Start difference. First operand has 69 places, 52 transitions, 564 flow. Second operand 5 states and 38 transitions. [2022-12-05 21:03:18,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 64 transitions, 747 flow [2022-12-05 21:03:18,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 64 transitions, 661 flow, removed 10 selfloop flow, removed 5 redundant places. [2022-12-05 21:03:18,890 INFO L231 Difference]: Finished difference. Result has 69 places, 52 transitions, 536 flow [2022-12-05 21:03:18,890 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=536, PETRI_PLACES=69, PETRI_TRANSITIONS=52} [2022-12-05 21:03:18,891 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 48 predicate places. [2022-12-05 21:03:18,891 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 52 transitions, 536 flow [2022-12-05 21:03:18,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:18,891 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:03:18,892 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:03:18,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-05 21:03:18,892 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:03:18,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:03:18,892 INFO L85 PathProgramCache]: Analyzing trace with hash -2130095449, now seen corresponding path program 4 times [2022-12-05 21:03:18,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:03:18,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733433448] [2022-12-05 21:03:18,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:03:18,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:03:18,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:03:19,083 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:19,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:03:19,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733433448] [2022-12-05 21:03:19,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733433448] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:03:19,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:03:19,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-05 21:03:19,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509335872] [2022-12-05 21:03:19,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:03:19,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 21:03:19,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:03:19,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 21:03:19,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-05 21:03:19,085 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:03:19,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 52 transitions, 536 flow. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:19,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:03:19,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:03:19,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:03:19,181 INFO L130 PetriNetUnfolder]: 114/220 cut-off events. [2022-12-05 21:03:19,181 INFO L131 PetriNetUnfolder]: For 1214/1214 co-relation queries the response was YES. [2022-12-05 21:03:19,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1222 conditions, 220 events. 114/220 cut-off events. For 1214/1214 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 712 event pairs, 11 based on Foata normal form. 8/228 useless extension candidates. Maximal degree in co-relation 1182. Up to 137 conditions per place. [2022-12-05 21:03:19,184 INFO L137 encePairwiseOnDemand]: 12/17 looper letters, 52 selfloop transitions, 10 changer transitions 1/63 dead transitions. [2022-12-05 21:03:19,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 63 transitions, 694 flow [2022-12-05 21:03:19,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 21:03:19,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 21:03:19,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 35 transitions. [2022-12-05 21:03:19,185 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2022-12-05 21:03:19,185 INFO L175 Difference]: Start difference. First operand has 69 places, 52 transitions, 536 flow. Second operand 5 states and 35 transitions. [2022-12-05 21:03:19,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 63 transitions, 694 flow [2022-12-05 21:03:19,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 63 transitions, 644 flow, removed 15 selfloop flow, removed 3 redundant places. [2022-12-05 21:03:19,192 INFO L231 Difference]: Finished difference. Result has 68 places, 49 transitions, 468 flow [2022-12-05 21:03:19,192 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=468, PETRI_PLACES=68, PETRI_TRANSITIONS=49} [2022-12-05 21:03:19,193 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 47 predicate places. [2022-12-05 21:03:19,193 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 49 transitions, 468 flow [2022-12-05 21:03:19,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:19,193 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:03:19,193 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:03:19,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-05 21:03:19,193 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:03:19,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:03:19,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1343315029, now seen corresponding path program 5 times [2022-12-05 21:03:19,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:03:19,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599192607] [2022-12-05 21:03:19,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:03:19,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:03:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:03:19,347 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:19,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:03:19,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599192607] [2022-12-05 21:03:19,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599192607] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:03:19,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:03:19,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-05 21:03:19,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555719788] [2022-12-05 21:03:19,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:03:19,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 21:03:19,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:03:19,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 21:03:19,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-05 21:03:19,349 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:03:19,349 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 49 transitions, 468 flow. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:19,349 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:03:19,349 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:03:19,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:03:19,429 INFO L130 PetriNetUnfolder]: 114/205 cut-off events. [2022-12-05 21:03:19,430 INFO L131 PetriNetUnfolder]: For 1071/1071 co-relation queries the response was YES. [2022-12-05 21:03:19,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1106 conditions, 205 events. 114/205 cut-off events. For 1071/1071 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 612 event pairs, 9 based on Foata normal form. 4/209 useless extension candidates. Maximal degree in co-relation 1067. Up to 98 conditions per place. [2022-12-05 21:03:19,432 INFO L137 encePairwiseOnDemand]: 12/17 looper letters, 41 selfloop transitions, 19 changer transitions 0/60 dead transitions. [2022-12-05 21:03:19,432 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 60 transitions, 631 flow [2022-12-05 21:03:19,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 21:03:19,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 21:03:19,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 35 transitions. [2022-12-05 21:03:19,433 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2022-12-05 21:03:19,433 INFO L175 Difference]: Start difference. First operand has 68 places, 49 transitions, 468 flow. Second operand 5 states and 35 transitions. [2022-12-05 21:03:19,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 60 transitions, 631 flow [2022-12-05 21:03:19,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 60 transitions, 571 flow, removed 8 selfloop flow, removed 8 redundant places. [2022-12-05 21:03:19,437 INFO L231 Difference]: Finished difference. Result has 62 places, 48 transitions, 444 flow [2022-12-05 21:03:19,438 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=444, PETRI_PLACES=62, PETRI_TRANSITIONS=48} [2022-12-05 21:03:19,438 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 41 predicate places. [2022-12-05 21:03:19,438 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 48 transitions, 444 flow [2022-12-05 21:03:19,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:19,438 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:03:19,438 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:03:19,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-05 21:03:19,439 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:03:19,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:03:19,439 INFO L85 PathProgramCache]: Analyzing trace with hash -678973940, now seen corresponding path program 1 times [2022-12-05 21:03:19,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:03:19,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222970232] [2022-12-05 21:03:19,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:03:19,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:03:19,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:03:20,242 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:20,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:03:20,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222970232] [2022-12-05 21:03:20,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222970232] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:03:20,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873178720] [2022-12-05 21:03:20,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:03:20,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:03:20,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:03:20,245 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:03:20,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-05 21:03:20,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:03:20,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-05 21:03:20,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:03:20,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 62 [2022-12-05 21:03:20,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:20,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:03:21,907 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:03:21,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 318 treesize of output 200 [2022-12-05 21:03:22,165 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:22,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873178720] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:03:22,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:03:22,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2022-12-05 21:03:22,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005637272] [2022-12-05 21:03:22,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:03:22,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-05 21:03:22,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:03:22,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-05 21:03:22,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-12-05 21:03:22,166 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:03:22,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 48 transitions, 444 flow. Second operand has 21 states, 20 states have (on average 2.2) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:22,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:03:22,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:03:22,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:03:23,623 INFO L130 PetriNetUnfolder]: 186/359 cut-off events. [2022-12-05 21:03:23,624 INFO L131 PetriNetUnfolder]: For 1631/1631 co-relation queries the response was YES. [2022-12-05 21:03:23,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1741 conditions, 359 events. 186/359 cut-off events. For 1631/1631 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1398 event pairs, 19 based on Foata normal form. 2/361 useless extension candidates. Maximal degree in co-relation 1704. Up to 149 conditions per place. [2022-12-05 21:03:23,627 INFO L137 encePairwiseOnDemand]: 8/17 looper letters, 68 selfloop transitions, 31 changer transitions 21/120 dead transitions. [2022-12-05 21:03:23,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 120 transitions, 1097 flow [2022-12-05 21:03:23,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-05 21:03:23,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-05 21:03:23,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 81 transitions. [2022-12-05 21:03:23,628 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3403361344537815 [2022-12-05 21:03:23,628 INFO L175 Difference]: Start difference. First operand has 62 places, 48 transitions, 444 flow. Second operand 14 states and 81 transitions. [2022-12-05 21:03:23,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 120 transitions, 1097 flow [2022-12-05 21:03:23,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 120 transitions, 1027 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-12-05 21:03:23,635 INFO L231 Difference]: Finished difference. Result has 76 places, 67 transitions, 644 flow [2022-12-05 21:03:23,635 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=644, PETRI_PLACES=76, PETRI_TRANSITIONS=67} [2022-12-05 21:03:23,635 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 55 predicate places. [2022-12-05 21:03:23,635 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 67 transitions, 644 flow [2022-12-05 21:03:23,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.2) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:23,636 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:03:23,636 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:03:23,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-05 21:03:23,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:03:23,841 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:03:23,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:03:23,841 INFO L85 PathProgramCache]: Analyzing trace with hash -32501058, now seen corresponding path program 2 times [2022-12-05 21:03:23,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:03:23,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116585914] [2022-12-05 21:03:23,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:03:23,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:03:23,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:03:24,599 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:24,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:03:24,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116585914] [2022-12-05 21:03:24,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116585914] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:03:24,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216885529] [2022-12-05 21:03:24,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:03:24,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:03:24,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:03:24,603 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:03:24,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-05 21:03:24,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:03:24,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:03:24,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-05 21:03:24,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:03:25,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 215 treesize of output 139 [2022-12-05 21:03:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:25,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:03:26,440 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:03:26,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 279 treesize of output 185 [2022-12-05 21:03:26,581 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:26,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216885529] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:03:26,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:03:26,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2022-12-05 21:03:26,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825843078] [2022-12-05 21:03:26,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:03:26,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-05 21:03:26,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:03:26,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-05 21:03:26,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-12-05 21:03:26,582 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:03:26,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 67 transitions, 644 flow. Second operand has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:26,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:03:26,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:03:26,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:03:30,362 INFO L130 PetriNetUnfolder]: 292/582 cut-off events. [2022-12-05 21:03:30,362 INFO L131 PetriNetUnfolder]: For 2147/2147 co-relation queries the response was YES. [2022-12-05 21:03:30,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2913 conditions, 582 events. 292/582 cut-off events. For 2147/2147 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2770 event pairs, 19 based on Foata normal form. 3/585 useless extension candidates. Maximal degree in co-relation 2872. Up to 169 conditions per place. [2022-12-05 21:03:30,367 INFO L137 encePairwiseOnDemand]: 8/17 looper letters, 122 selfloop transitions, 63 changer transitions 14/199 dead transitions. [2022-12-05 21:03:30,367 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 199 transitions, 1864 flow [2022-12-05 21:03:30,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-05 21:03:30,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-05 21:03:30,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 149 transitions. [2022-12-05 21:03:30,369 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.38107416879795397 [2022-12-05 21:03:30,369 INFO L175 Difference]: Start difference. First operand has 76 places, 67 transitions, 644 flow. Second operand 23 states and 149 transitions. [2022-12-05 21:03:30,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 199 transitions, 1864 flow [2022-12-05 21:03:30,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 199 transitions, 1741 flow, removed 61 selfloop flow, removed 4 redundant places. [2022-12-05 21:03:30,379 INFO L231 Difference]: Finished difference. Result has 102 places, 107 transitions, 1214 flow [2022-12-05 21:03:30,380 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1214, PETRI_PLACES=102, PETRI_TRANSITIONS=107} [2022-12-05 21:03:30,380 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 81 predicate places. [2022-12-05 21:03:30,380 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 107 transitions, 1214 flow [2022-12-05 21:03:30,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:30,380 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:03:30,380 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:03:30,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-05 21:03:30,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:03:30,585 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:03:30,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:03:30,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1855111052, now seen corresponding path program 3 times [2022-12-05 21:03:30,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:03:30,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716846127] [2022-12-05 21:03:30,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:03:30,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:03:30,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:03:31,325 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:31,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:03:31,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716846127] [2022-12-05 21:03:31,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716846127] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:03:31,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596065467] [2022-12-05 21:03:31,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:03:31,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:03:31,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:03:31,328 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:03:31,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-05 21:03:31,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 21:03:31,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:03:31,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-05 21:03:31,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:03:31,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 113 [2022-12-05 21:03:31,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:31,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:03:32,941 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:03:32,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 335 treesize of output 227 [2022-12-05 21:03:33,418 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:33,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596065467] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:03:33,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:03:33,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2022-12-05 21:03:33,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740757555] [2022-12-05 21:03:33,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:03:33,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-05 21:03:33,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:03:33,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-05 21:03:33,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-12-05 21:03:33,422 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:03:33,423 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 107 transitions, 1214 flow. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:33,423 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:03:33,423 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:03:33,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:03:36,032 INFO L130 PetriNetUnfolder]: 391/794 cut-off events. [2022-12-05 21:03:36,033 INFO L131 PetriNetUnfolder]: For 3921/3921 co-relation queries the response was YES. [2022-12-05 21:03:36,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4235 conditions, 794 events. 391/794 cut-off events. For 3921/3921 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4223 event pairs, 62 based on Foata normal form. 9/803 useless extension candidates. Maximal degree in co-relation 4184. Up to 410 conditions per place. [2022-12-05 21:03:36,041 INFO L137 encePairwiseOnDemand]: 9/17 looper letters, 131 selfloop transitions, 81 changer transitions 14/226 dead transitions. [2022-12-05 21:03:36,041 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 226 transitions, 2479 flow [2022-12-05 21:03:36,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-05 21:03:36,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-05 21:03:36,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 131 transitions. [2022-12-05 21:03:36,043 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.32107843137254904 [2022-12-05 21:03:36,043 INFO L175 Difference]: Start difference. First operand has 102 places, 107 transitions, 1214 flow. Second operand 24 states and 131 transitions. [2022-12-05 21:03:36,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 226 transitions, 2479 flow [2022-12-05 21:03:36,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 226 transitions, 2279 flow, removed 85 selfloop flow, removed 5 redundant places. [2022-12-05 21:03:36,063 INFO L231 Difference]: Finished difference. Result has 125 places, 156 transitions, 1780 flow [2022-12-05 21:03:36,063 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=1086, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1780, PETRI_PLACES=125, PETRI_TRANSITIONS=156} [2022-12-05 21:03:36,064 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 104 predicate places. [2022-12-05 21:03:36,064 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 156 transitions, 1780 flow [2022-12-05 21:03:36,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:36,064 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:03:36,064 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:03:36,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-05 21:03:36,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:03:36,269 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:03:36,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:03:36,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1481162220, now seen corresponding path program 4 times [2022-12-05 21:03:36,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:03:36,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636650836] [2022-12-05 21:03:36,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:03:36,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:03:36,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:03:37,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:37,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:03:37,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636650836] [2022-12-05 21:03:37,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636650836] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:03:37,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137533802] [2022-12-05 21:03:37,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:03:37,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:03:37,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:03:37,074 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:03:37,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-05 21:03:37,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:03:37,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:03:37,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-05 21:03:37,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:03:37,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 194 treesize of output 126 [2022-12-05 21:03:37,663 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:37,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:03:38,597 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:03:38,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 294 treesize of output 210 [2022-12-05 21:03:38,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:38,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137533802] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:03:38,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:03:38,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2022-12-05 21:03:38,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140055525] [2022-12-05 21:03:38,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:03:38,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-05 21:03:38,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:03:38,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-05 21:03:38,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-12-05 21:03:38,959 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:03:38,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 156 transitions, 1780 flow. Second operand has 21 states, 20 states have (on average 2.15) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:38,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:03:38,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:03:38,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:03:40,024 INFO L130 PetriNetUnfolder]: 449/955 cut-off events. [2022-12-05 21:03:40,024 INFO L131 PetriNetUnfolder]: For 5304/5304 co-relation queries the response was YES. [2022-12-05 21:03:40,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5151 conditions, 955 events. 449/955 cut-off events. For 5304/5304 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5586 event pairs, 64 based on Foata normal form. 12/967 useless extension candidates. Maximal degree in co-relation 5094. Up to 268 conditions per place. [2022-12-05 21:03:40,034 INFO L137 encePairwiseOnDemand]: 9/17 looper letters, 140 selfloop transitions, 84 changer transitions 15/239 dead transitions. [2022-12-05 21:03:40,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 239 transitions, 2920 flow [2022-12-05 21:03:40,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-05 21:03:40,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-05 21:03:40,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 85 transitions. [2022-12-05 21:03:40,035 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2022-12-05 21:03:40,035 INFO L175 Difference]: Start difference. First operand has 125 places, 156 transitions, 1780 flow. Second operand 15 states and 85 transitions. [2022-12-05 21:03:40,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 239 transitions, 2920 flow [2022-12-05 21:03:40,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 239 transitions, 2685 flow, removed 100 selfloop flow, removed 5 redundant places. [2022-12-05 21:03:40,064 INFO L231 Difference]: Finished difference. Result has 138 places, 178 transitions, 2065 flow [2022-12-05 21:03:40,064 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=1605, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2065, PETRI_PLACES=138, PETRI_TRANSITIONS=178} [2022-12-05 21:03:40,064 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 117 predicate places. [2022-12-05 21:03:40,064 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 178 transitions, 2065 flow [2022-12-05 21:03:40,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:40,065 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:03:40,065 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:03:40,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-05 21:03:40,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-05 21:03:40,270 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:03:40,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:03:40,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1926284010, now seen corresponding path program 5 times [2022-12-05 21:03:40,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:03:40,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421739416] [2022-12-05 21:03:40,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:03:40,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:03:40,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:03:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:41,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:03:41,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421739416] [2022-12-05 21:03:41,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421739416] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:03:41,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133295361] [2022-12-05 21:03:41,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:03:41,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:03:41,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:03:41,132 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:03:41,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-05 21:03:41,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-05 21:03:41,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:03:41,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-05 21:03:41,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:03:41,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:03:41,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 77 [2022-12-05 21:03:41,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 84 [2022-12-05 21:03:41,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:41,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:03:42,701 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse5 (= 0 c_~break_6~0))) (let ((.cse2 (not .cse5)) (.cse1 (forall ((v_ArrVal_538 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_538) c_~nondet_0~0.base) c_~nondet_0~0.offset) c_~name_2~0))) (.cse4 (< (+ 2147483647 c_~name_2~0) c_~name_1~0)) (.cse0 (< (+ c_~name_1~0 2147483648) c_~name_2~0)) (.cse3 (< c_~i_4~0 3))) (and (or (< c_~name_2~0 c_~name_1~0) .cse0 .cse1 .cse2 .cse3) (or (forall ((v_ArrVal_538 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_538) c_~nondet_0~0.base) c_~nondet_0~0.offset) c_~name_2~0))) (and (or .cse4 (< c_~name_1~0 c_~name_2~0) .cse2 .cse3) (or (< c_~result_3~0 0) .cse5))) (or .cse5 .cse1 (< 0 c_~result_3~0)) (or (forall ((v_ArrVal_538 (Array Int Int))) (let ((.cse6 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_538) c_~nondet_0~0.base) c_~nondet_0~0.offset))) (or (= c_~name_1~0 .cse6) (= .cse6 c_~name_2~0)))) (and (or .cse4 .cse0 .cse3) .cse5))))) is different from false [2022-12-05 21:03:42,804 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:03:42,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 307 treesize of output 233 [2022-12-05 21:03:42,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 154 [2022-12-05 21:03:42,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 152 [2022-12-05 21:03:42,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 148 [2022-12-05 21:03:42,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 146 [2022-12-05 21:03:43,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:43,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133295361] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:03:43,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:03:43,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2022-12-05 21:03:43,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698777934] [2022-12-05 21:03:43,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:03:43,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-05 21:03:43,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:03:43,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-05 21:03:43,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=612, Unknown=1, NotChecked=50, Total=756 [2022-12-05 21:03:43,152 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:03:43,152 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 178 transitions, 2065 flow. Second operand has 28 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:43,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:03:43,153 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:03:43,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:03:45,791 INFO L130 PetriNetUnfolder]: 535/1146 cut-off events. [2022-12-05 21:03:45,791 INFO L131 PetriNetUnfolder]: For 7988/7988 co-relation queries the response was YES. [2022-12-05 21:03:45,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6471 conditions, 1146 events. 535/1146 cut-off events. For 7988/7988 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7099 event pairs, 61 based on Foata normal form. 10/1156 useless extension candidates. Maximal degree in co-relation 6409. Up to 263 conditions per place. [2022-12-05 21:03:45,801 INFO L137 encePairwiseOnDemand]: 9/17 looper letters, 147 selfloop transitions, 116 changer transitions 24/287 dead transitions. [2022-12-05 21:03:45,802 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 287 transitions, 3561 flow [2022-12-05 21:03:45,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-05 21:03:45,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-05 21:03:45,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 121 transitions. [2022-12-05 21:03:45,803 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3389355742296919 [2022-12-05 21:03:45,803 INFO L175 Difference]: Start difference. First operand has 138 places, 178 transitions, 2065 flow. Second operand 21 states and 121 transitions. [2022-12-05 21:03:45,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 287 transitions, 3561 flow [2022-12-05 21:03:45,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 287 transitions, 3489 flow, removed 21 selfloop flow, removed 7 redundant places. [2022-12-05 21:03:45,845 INFO L231 Difference]: Finished difference. Result has 160 places, 204 transitions, 2772 flow [2022-12-05 21:03:45,845 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=2013, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2772, PETRI_PLACES=160, PETRI_TRANSITIONS=204} [2022-12-05 21:03:45,846 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 139 predicate places. [2022-12-05 21:03:45,846 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 204 transitions, 2772 flow [2022-12-05 21:03:45,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:45,846 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:03:45,846 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:03:45,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-05 21:03:46,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:03:46,056 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:03:46,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:03:46,056 INFO L85 PathProgramCache]: Analyzing trace with hash -737580838, now seen corresponding path program 6 times [2022-12-05 21:03:46,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:03:46,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497396532] [2022-12-05 21:03:46,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:03:46,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:03:46,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:03:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:46,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:03:46,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497396532] [2022-12-05 21:03:46,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497396532] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:03:46,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980237408] [2022-12-05 21:03:46,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:03:46,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:03:46,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:03:46,759 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:03:46,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-05 21:03:46,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-05 21:03:46,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:03:46,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-05 21:03:46,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:03:47,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 196 treesize of output 128 [2022-12-05 21:03:47,326 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:47,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:03:48,151 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:03:48,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 309 treesize of output 201 [2022-12-05 21:03:48,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:48,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980237408] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:03:48,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:03:48,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2022-12-05 21:03:48,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002005455] [2022-12-05 21:03:48,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:03:48,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-05 21:03:48,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:03:48,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-05 21:03:48,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-12-05 21:03:48,344 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:03:48,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 204 transitions, 2772 flow. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:48,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:03:48,345 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:03:48,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:03:49,767 INFO L130 PetriNetUnfolder]: 545/1134 cut-off events. [2022-12-05 21:03:49,767 INFO L131 PetriNetUnfolder]: For 10998/10998 co-relation queries the response was YES. [2022-12-05 21:03:49,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7307 conditions, 1134 events. 545/1134 cut-off events. For 10998/10998 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 6787 event pairs, 92 based on Foata normal form. 2/1136 useless extension candidates. Maximal degree in co-relation 7235. Up to 544 conditions per place. [2022-12-05 21:03:49,777 INFO L137 encePairwiseOnDemand]: 9/17 looper letters, 155 selfloop transitions, 96 changer transitions 10/261 dead transitions. [2022-12-05 21:03:49,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 261 transitions, 3802 flow [2022-12-05 21:03:49,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-05 21:03:49,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-05 21:03:49,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 78 transitions. [2022-12-05 21:03:49,778 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.2698961937716263 [2022-12-05 21:03:49,778 INFO L175 Difference]: Start difference. First operand has 160 places, 204 transitions, 2772 flow. Second operand 17 states and 78 transitions. [2022-12-05 21:03:49,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 261 transitions, 3802 flow [2022-12-05 21:03:49,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 261 transitions, 3535 flow, removed 73 selfloop flow, removed 12 redundant places. [2022-12-05 21:03:49,816 INFO L231 Difference]: Finished difference. Result has 168 places, 220 transitions, 2983 flow [2022-12-05 21:03:49,816 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=2535, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2983, PETRI_PLACES=168, PETRI_TRANSITIONS=220} [2022-12-05 21:03:49,817 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 147 predicate places. [2022-12-05 21:03:49,817 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 220 transitions, 2983 flow [2022-12-05 21:03:49,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:49,817 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:03:49,817 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:03:49,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-05 21:03:50,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:03:50,025 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:03:50,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:03:50,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1857362474, now seen corresponding path program 7 times [2022-12-05 21:03:50,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:03:50,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346292666] [2022-12-05 21:03:50,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:03:50,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:03:50,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:03:50,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:50,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:03:50,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346292666] [2022-12-05 21:03:50,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346292666] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:03:50,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944865736] [2022-12-05 21:03:50,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:03:50,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:03:50,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:03:50,680 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:03:50,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-05 21:03:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:03:50,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-05 21:03:50,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:03:51,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 215 treesize of output 139 [2022-12-05 21:03:51,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:51,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:03:52,279 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:03:52,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 341 treesize of output 241 [2022-12-05 21:03:52,760 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:52,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944865736] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:03:52,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:03:52,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2022-12-05 21:03:52,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200867934] [2022-12-05 21:03:52,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:03:52,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-05 21:03:52,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:03:52,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-05 21:03:52,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-12-05 21:03:52,761 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:03:52,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 220 transitions, 2983 flow. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:52,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:03:52,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:03:52,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:03:55,171 INFO L130 PetriNetUnfolder]: 637/1325 cut-off events. [2022-12-05 21:03:55,171 INFO L131 PetriNetUnfolder]: For 12332/12332 co-relation queries the response was YES. [2022-12-05 21:03:55,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8492 conditions, 1325 events. 637/1325 cut-off events. For 12332/12332 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 8267 event pairs, 100 based on Foata normal form. 11/1336 useless extension candidates. Maximal degree in co-relation 8421. Up to 576 conditions per place. [2022-12-05 21:03:55,182 INFO L137 encePairwiseOnDemand]: 9/17 looper letters, 180 selfloop transitions, 138 changer transitions 17/335 dead transitions. [2022-12-05 21:03:55,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 335 transitions, 4692 flow [2022-12-05 21:03:55,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-05 21:03:55,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-05 21:03:55,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 128 transitions. [2022-12-05 21:03:55,184 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3422459893048128 [2022-12-05 21:03:55,184 INFO L175 Difference]: Start difference. First operand has 168 places, 220 transitions, 2983 flow. Second operand 22 states and 128 transitions. [2022-12-05 21:03:55,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 335 transitions, 4692 flow [2022-12-05 21:03:55,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 335 transitions, 4470 flow, removed 69 selfloop flow, removed 5 redundant places. [2022-12-05 21:03:55,225 INFO L231 Difference]: Finished difference. Result has 192 places, 260 transitions, 3755 flow [2022-12-05 21:03:55,225 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=2809, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3755, PETRI_PLACES=192, PETRI_TRANSITIONS=260} [2022-12-05 21:03:55,226 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 171 predicate places. [2022-12-05 21:03:55,226 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 260 transitions, 3755 flow [2022-12-05 21:03:55,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:55,226 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:03:55,226 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:03:55,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-05 21:03:55,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-05 21:03:55,427 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:03:55,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:03:55,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1205473154, now seen corresponding path program 8 times [2022-12-05 21:03:55,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:03:55,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952445299] [2022-12-05 21:03:55,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:03:55,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:03:55,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:03:56,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:56,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:03:56,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952445299] [2022-12-05 21:03:56,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952445299] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:03:56,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438566065] [2022-12-05 21:03:56,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:03:56,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:03:56,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:03:56,215 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:03:56,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-05 21:03:56,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:03:56,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:03:56,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-05 21:03:56,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:03:56,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 111 [2022-12-05 21:03:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:56,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:03:57,788 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:03:57,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 168 [2022-12-05 21:03:57,896 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:03:57,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438566065] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:03:57,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:03:57,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2022-12-05 21:03:57,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046471605] [2022-12-05 21:03:57,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:03:57,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-05 21:03:57,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:03:57,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-05 21:03:57,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-12-05 21:03:57,898 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:03:57,898 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 260 transitions, 3755 flow. Second operand has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:57,898 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:03:57,898 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:03:57,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:03:59,569 INFO L130 PetriNetUnfolder]: 719/1528 cut-off events. [2022-12-05 21:03:59,569 INFO L131 PetriNetUnfolder]: For 16251/16251 co-relation queries the response was YES. [2022-12-05 21:03:59,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10260 conditions, 1528 events. 719/1528 cut-off events. For 16251/16251 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 10034 event pairs, 29 based on Foata normal form. 14/1542 useless extension candidates. Maximal degree in co-relation 10181. Up to 538 conditions per place. [2022-12-05 21:03:59,586 INFO L137 encePairwiseOnDemand]: 9/17 looper letters, 200 selfloop transitions, 152 changer transitions 15/367 dead transitions. [2022-12-05 21:03:59,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 367 transitions, 5740 flow [2022-12-05 21:03:59,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-05 21:03:59,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-05 21:03:59,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 96 transitions. [2022-12-05 21:03:59,589 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.35294117647058826 [2022-12-05 21:03:59,589 INFO L175 Difference]: Start difference. First operand has 192 places, 260 transitions, 3755 flow. Second operand 16 states and 96 transitions. [2022-12-05 21:03:59,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 367 transitions, 5740 flow [2022-12-05 21:03:59,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 367 transitions, 5457 flow, removed 102 selfloop flow, removed 5 redundant places. [2022-12-05 21:03:59,671 INFO L231 Difference]: Finished difference. Result has 206 places, 290 transitions, 4468 flow [2022-12-05 21:03:59,672 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=3510, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4468, PETRI_PLACES=206, PETRI_TRANSITIONS=290} [2022-12-05 21:03:59,672 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 185 predicate places. [2022-12-05 21:03:59,672 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 290 transitions, 4468 flow [2022-12-05 21:03:59,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:03:59,672 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:03:59,672 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:03:59,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-05 21:03:59,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-05 21:03:59,873 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:03:59,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:03:59,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1814310352, now seen corresponding path program 9 times [2022-12-05 21:03:59,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:03:59,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476564331] [2022-12-05 21:03:59,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:03:59,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:03:59,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:04:00,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:00,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:04:00,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476564331] [2022-12-05 21:04:00,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476564331] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:04:00,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400737039] [2022-12-05 21:04:00,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:04:00,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:04:00,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:04:00,639 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:04:00,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-05 21:04:00,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-05 21:04:00,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:04:00,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-05 21:04:00,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:04:00,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 84 [2022-12-05 21:04:01,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:01,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:04:01,899 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:04:01,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 352 treesize of output 244 [2022-12-05 21:04:02,226 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:02,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400737039] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:04:02,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:04:02,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2022-12-05 21:04:02,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375310388] [2022-12-05 21:04:02,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:04:02,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-05 21:04:02,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:04:02,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-05 21:04:02,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-12-05 21:04:02,227 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:04:02,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 290 transitions, 4468 flow. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:02,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:04:02,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:04:02,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:04:04,109 INFO L130 PetriNetUnfolder]: 750/1602 cut-off events. [2022-12-05 21:04:04,110 INFO L131 PetriNetUnfolder]: For 17883/17883 co-relation queries the response was YES. [2022-12-05 21:04:04,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10877 conditions, 1602 events. 750/1602 cut-off events. For 17883/17883 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 10646 event pairs, 133 based on Foata normal form. 3/1605 useless extension candidates. Maximal degree in co-relation 10793. Up to 717 conditions per place. [2022-12-05 21:04:04,123 INFO L137 encePairwiseOnDemand]: 9/17 looper letters, 226 selfloop transitions, 136 changer transitions 13/375 dead transitions. [2022-12-05 21:04:04,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 375 transitions, 5941 flow [2022-12-05 21:04:04,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-05 21:04:04,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-05 21:04:04,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 108 transitions. [2022-12-05 21:04:04,133 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.2887700534759358 [2022-12-05 21:04:04,134 INFO L175 Difference]: Start difference. First operand has 206 places, 290 transitions, 4468 flow. Second operand 22 states and 108 transitions. [2022-12-05 21:04:04,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 375 transitions, 5941 flow [2022-12-05 21:04:04,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 375 transitions, 5685 flow, removed 58 selfloop flow, removed 10 redundant places. [2022-12-05 21:04:04,240 INFO L231 Difference]: Finished difference. Result has 224 places, 305 transitions, 4850 flow [2022-12-05 21:04:04,240 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=4236, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4850, PETRI_PLACES=224, PETRI_TRANSITIONS=305} [2022-12-05 21:04:04,240 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 203 predicate places. [2022-12-05 21:04:04,240 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 305 transitions, 4850 flow [2022-12-05 21:04:04,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:04,240 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:04:04,240 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:04:04,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-05 21:04:04,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-05 21:04:04,441 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:04:04,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:04:04,442 INFO L85 PathProgramCache]: Analyzing trace with hash 30446691, now seen corresponding path program 10 times [2022-12-05 21:04:04,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:04:04,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773024083] [2022-12-05 21:04:04,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:04:04,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:04:04,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:04:04,878 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:04,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:04:04,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773024083] [2022-12-05 21:04:04,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773024083] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:04:04,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282896767] [2022-12-05 21:04:04,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:04:04,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:04:04,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:04:04,880 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:04:04,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-05 21:04:04,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:04:04,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:04:04,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-05 21:04:04,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:04:05,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2022-12-05 21:04:05,292 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:05,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:04:05,492 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:04:05,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 71 [2022-12-05 21:04:05,546 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:05,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282896767] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:04:05,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:04:05,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-12-05 21:04:05,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792212142] [2022-12-05 21:04:05,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:04:05,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-05 21:04:05,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:04:05,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-05 21:04:05,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-12-05 21:04:05,547 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:04:05,547 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 305 transitions, 4850 flow. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:05,548 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:04:05,548 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:04:05,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:04:06,477 INFO L130 PetriNetUnfolder]: 734/1561 cut-off events. [2022-12-05 21:04:06,477 INFO L131 PetriNetUnfolder]: For 20621/20621 co-relation queries the response was YES. [2022-12-05 21:04:06,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11010 conditions, 1561 events. 734/1561 cut-off events. For 20621/20621 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 10288 event pairs, 158 based on Foata normal form. 10/1571 useless extension candidates. Maximal degree in co-relation 10921. Up to 800 conditions per place. [2022-12-05 21:04:06,494 INFO L137 encePairwiseOnDemand]: 9/17 looper letters, 220 selfloop transitions, 119 changer transitions 0/339 dead transitions. [2022-12-05 21:04:06,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 339 transitions, 5653 flow [2022-12-05 21:04:06,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-05 21:04:06,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-05 21:04:06,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 82 transitions. [2022-12-05 21:04:06,495 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.37104072398190047 [2022-12-05 21:04:06,495 INFO L175 Difference]: Start difference. First operand has 224 places, 305 transitions, 4850 flow. Second operand 13 states and 82 transitions. [2022-12-05 21:04:06,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 339 transitions, 5653 flow [2022-12-05 21:04:06,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 339 transitions, 5396 flow, removed 41 selfloop flow, removed 13 redundant places. [2022-12-05 21:04:06,609 INFO L231 Difference]: Finished difference. Result has 224 places, 304 transitions, 4911 flow [2022-12-05 21:04:06,609 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=4502, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4911, PETRI_PLACES=224, PETRI_TRANSITIONS=304} [2022-12-05 21:04:06,609 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 203 predicate places. [2022-12-05 21:04:06,609 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 304 transitions, 4911 flow [2022-12-05 21:04:06,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:06,610 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:04:06,610 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:04:06,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-05 21:04:06,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-05 21:04:06,816 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:04:06,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:04:06,817 INFO L85 PathProgramCache]: Analyzing trace with hash -734568689, now seen corresponding path program 11 times [2022-12-05 21:04:06,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:04:06,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302876852] [2022-12-05 21:04:06,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:04:06,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:04:06,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:04:07,244 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:07,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:04:07,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302876852] [2022-12-05 21:04:07,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302876852] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:04:07,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972661057] [2022-12-05 21:04:07,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:04:07,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:04:07,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:04:07,246 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:04:07,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-05 21:04:07,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-05 21:04:07,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:04:07,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-05 21:04:07,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:04:07,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 50 [2022-12-05 21:04:07,494 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:07,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:04:07,648 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-05 21:04:07,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 44 [2022-12-05 21:04:07,677 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:07,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972661057] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:04:07,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:04:07,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2022-12-05 21:04:07,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934355217] [2022-12-05 21:04:07,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:04:07,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-05 21:04:07,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:04:07,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-05 21:04:07,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-12-05 21:04:07,679 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:04:07,679 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 304 transitions, 4911 flow. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:07,679 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:04:07,679 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:04:07,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:04:08,387 INFO L130 PetriNetUnfolder]: 713/1526 cut-off events. [2022-12-05 21:04:08,388 INFO L131 PetriNetUnfolder]: For 20123/20123 co-relation queries the response was YES. [2022-12-05 21:04:08,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10853 conditions, 1526 events. 713/1526 cut-off events. For 20123/20123 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 10032 event pairs, 244 based on Foata normal form. 8/1534 useless extension candidates. Maximal degree in co-relation 10762. Up to 1058 conditions per place. [2022-12-05 21:04:08,401 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 234 selfloop transitions, 75 changer transitions 10/319 dead transitions. [2022-12-05 21:04:08,401 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 319 transitions, 5555 flow [2022-12-05 21:04:08,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-05 21:04:08,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-05 21:04:08,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 55 transitions. [2022-12-05 21:04:08,409 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3235294117647059 [2022-12-05 21:04:08,409 INFO L175 Difference]: Start difference. First operand has 224 places, 304 transitions, 4911 flow. Second operand 10 states and 55 transitions. [2022-12-05 21:04:08,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 319 transitions, 5555 flow [2022-12-05 21:04:08,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 319 transitions, 5394 flow, removed 4 selfloop flow, removed 9 redundant places. [2022-12-05 21:04:08,537 INFO L231 Difference]: Finished difference. Result has 224 places, 296 transitions, 4767 flow [2022-12-05 21:04:08,538 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=4690, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4767, PETRI_PLACES=224, PETRI_TRANSITIONS=296} [2022-12-05 21:04:08,540 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 203 predicate places. [2022-12-05 21:04:08,540 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 296 transitions, 4767 flow [2022-12-05 21:04:08,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:08,540 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:04:08,540 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:04:08,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-05 21:04:08,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-05 21:04:08,746 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:04:08,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:04:08,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1998044081, now seen corresponding path program 12 times [2022-12-05 21:04:08,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:04:08,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811246257] [2022-12-05 21:04:08,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:04:08,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:04:08,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:04:09,169 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:09,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:04:09,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811246257] [2022-12-05 21:04:09,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811246257] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:04:09,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577542897] [2022-12-05 21:04:09,169 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:04:09,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:04:09,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:04:09,170 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:04:09,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-05 21:04:09,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-05 21:04:09,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:04:09,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-05 21:04:09,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:04:09,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2022-12-05 21:04:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:09,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:04:09,768 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:04:09,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2022-12-05 21:04:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:09,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577542897] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:04:09,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:04:09,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-12-05 21:04:09,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755237602] [2022-12-05 21:04:09,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:04:09,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-05 21:04:09,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:04:09,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-05 21:04:09,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-12-05 21:04:09,822 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:04:09,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 296 transitions, 4767 flow. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:09,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:04:09,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:04:09,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:04:10,548 INFO L130 PetriNetUnfolder]: 736/1587 cut-off events. [2022-12-05 21:04:10,548 INFO L131 PetriNetUnfolder]: For 20687/20687 co-relation queries the response was YES. [2022-12-05 21:04:10,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11174 conditions, 1587 events. 736/1587 cut-off events. For 20687/20687 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 10576 event pairs, 289 based on Foata normal form. 12/1599 useless extension candidates. Maximal degree in co-relation 11084. Up to 1346 conditions per place. [2022-12-05 21:04:10,562 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 279 selfloop transitions, 58 changer transitions 1/338 dead transitions. [2022-12-05 21:04:10,562 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 338 transitions, 5821 flow [2022-12-05 21:04:10,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-05 21:04:10,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-05 21:04:10,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 69 transitions. [2022-12-05 21:04:10,569 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3382352941176471 [2022-12-05 21:04:10,569 INFO L175 Difference]: Start difference. First operand has 224 places, 296 transitions, 4767 flow. Second operand 12 states and 69 transitions. [2022-12-05 21:04:10,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 338 transitions, 5821 flow [2022-12-05 21:04:10,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 338 transitions, 5663 flow, removed 4 selfloop flow, removed 7 redundant places. [2022-12-05 21:04:10,678 INFO L231 Difference]: Finished difference. Result has 230 places, 303 transitions, 4895 flow [2022-12-05 21:04:10,679 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=4575, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4895, PETRI_PLACES=230, PETRI_TRANSITIONS=303} [2022-12-05 21:04:10,679 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 209 predicate places. [2022-12-05 21:04:10,679 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 303 transitions, 4895 flow [2022-12-05 21:04:10,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:10,679 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:04:10,680 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:04:10,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-05 21:04:10,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:04:10,880 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:04:10,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:04:10,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1029250303, now seen corresponding path program 13 times [2022-12-05 21:04:10,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:04:10,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768773678] [2022-12-05 21:04:10,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:04:10,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:04:10,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:04:11,680 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:04:11,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:04:11,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768773678] [2022-12-05 21:04:11,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768773678] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:04:11,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87504417] [2022-12-05 21:04:11,681 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:04:11,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:04:11,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:04:11,684 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:04:11,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-05 21:04:11,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:04:11,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-05 21:04:11,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:04:12,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 93 [2022-12-05 21:04:12,131 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:12,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:04:12,304 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:04:12,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 59 [2022-12-05 21:04:12,377 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:12,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87504417] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:04:12,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:04:12,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 24 [2022-12-05 21:04:12,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124237553] [2022-12-05 21:04:12,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:04:12,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-05 21:04:12,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:04:12,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-05 21:04:12,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-12-05 21:04:12,378 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:04:12,378 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 303 transitions, 4895 flow. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:12,378 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:04:12,378 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:04:12,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:04:13,144 INFO L130 PetriNetUnfolder]: 761/1663 cut-off events. [2022-12-05 21:04:13,144 INFO L131 PetriNetUnfolder]: For 23859/23859 co-relation queries the response was YES. [2022-12-05 21:04:13,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11896 conditions, 1663 events. 761/1663 cut-off events. For 23859/23859 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 11298 event pairs, 198 based on Foata normal form. 6/1669 useless extension candidates. Maximal degree in co-relation 11802. Up to 951 conditions per place. [2022-12-05 21:04:13,157 INFO L137 encePairwiseOnDemand]: 9/17 looper letters, 257 selfloop transitions, 87 changer transitions 2/346 dead transitions. [2022-12-05 21:04:13,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 346 transitions, 6096 flow [2022-12-05 21:04:13,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-05 21:04:13,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-05 21:04:13,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 63 transitions. [2022-12-05 21:04:13,162 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.2850678733031674 [2022-12-05 21:04:13,162 INFO L175 Difference]: Start difference. First operand has 230 places, 303 transitions, 4895 flow. Second operand 13 states and 63 transitions. [2022-12-05 21:04:13,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 346 transitions, 6096 flow [2022-12-05 21:04:13,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 346 transitions, 5934 flow, removed 48 selfloop flow, removed 7 redundant places. [2022-12-05 21:04:13,266 INFO L231 Difference]: Finished difference. Result has 239 places, 312 transitions, 5248 flow [2022-12-05 21:04:13,266 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=4733, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5248, PETRI_PLACES=239, PETRI_TRANSITIONS=312} [2022-12-05 21:04:13,267 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 218 predicate places. [2022-12-05 21:04:13,267 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 312 transitions, 5248 flow [2022-12-05 21:04:13,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:13,267 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:04:13,267 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:04:13,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-05 21:04:13,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:04:13,470 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:04:13,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:04:13,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1676322395, now seen corresponding path program 14 times [2022-12-05 21:04:13,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:04:13,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577602013] [2022-12-05 21:04:13,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:04:13,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:04:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:04:14,271 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:04:14,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:04:14,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577602013] [2022-12-05 21:04:14,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577602013] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:04:14,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819097657] [2022-12-05 21:04:14,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:04:14,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:04:14,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:04:14,278 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:04:14,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-05 21:04:14,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:04:14,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:04:14,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-05 21:04:14,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:04:14,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 59 [2022-12-05 21:04:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:14,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:04:14,747 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:04:14,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 59 [2022-12-05 21:04:14,826 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:14,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819097657] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:04:14,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:04:14,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 23 [2022-12-05 21:04:14,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276058558] [2022-12-05 21:04:14,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:04:14,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-05 21:04:14,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:04:14,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-05 21:04:14,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-12-05 21:04:14,834 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:04:14,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 312 transitions, 5248 flow. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:14,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:04:14,835 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:04:14,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:04:16,376 INFO L130 PetriNetUnfolder]: 1499/3240 cut-off events. [2022-12-05 21:04:16,377 INFO L131 PetriNetUnfolder]: For 51528/51528 co-relation queries the response was YES. [2022-12-05 21:04:16,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23797 conditions, 3240 events. 1499/3240 cut-off events. For 51528/51528 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 24931 event pairs, 252 based on Foata normal form. 24/3264 useless extension candidates. Maximal degree in co-relation 23489. Up to 577 conditions per place. [2022-12-05 21:04:16,400 INFO L137 encePairwiseOnDemand]: 8/17 looper letters, 434 selfloop transitions, 266 changer transitions 0/700 dead transitions. [2022-12-05 21:04:16,400 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 700 transitions, 12532 flow [2022-12-05 21:04:16,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-05 21:04:16,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-05 21:04:16,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 134 transitions. [2022-12-05 21:04:16,401 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3031674208144796 [2022-12-05 21:04:16,401 INFO L175 Difference]: Start difference. First operand has 239 places, 312 transitions, 5248 flow. Second operand 26 states and 134 transitions. [2022-12-05 21:04:16,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 700 transitions, 12532 flow [2022-12-05 21:04:16,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 700 transitions, 12256 flow, removed 28 selfloop flow, removed 8 redundant places. [2022-12-05 21:04:16,640 INFO L231 Difference]: Finished difference. Result has 256 places, 439 transitions, 8137 flow [2022-12-05 21:04:16,640 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=4971, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=8137, PETRI_PLACES=256, PETRI_TRANSITIONS=439} [2022-12-05 21:04:16,641 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 235 predicate places. [2022-12-05 21:04:16,641 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 439 transitions, 8137 flow [2022-12-05 21:04:16,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:16,641 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:04:16,641 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:04:16,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-05 21:04:16,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:04:16,842 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:04:16,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:04:16,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1675925285, now seen corresponding path program 15 times [2022-12-05 21:04:16,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:04:16,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819003413] [2022-12-05 21:04:16,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:04:16,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:04:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:04:17,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:04:17,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:04:17,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819003413] [2022-12-05 21:04:17,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819003413] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:04:17,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657704831] [2022-12-05 21:04:17,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:04:17,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:04:17,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:04:17,592 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:04:17,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-05 21:04:17,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 21:04:17,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:04:17,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-05 21:04:17,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:04:17,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 48 [2022-12-05 21:04:17,983 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:17,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:04:18,108 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:04:18,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 73 [2022-12-05 21:04:18,200 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:18,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657704831] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:04:18,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:04:18,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 24 [2022-12-05 21:04:18,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789689237] [2022-12-05 21:04:18,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:04:18,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-05 21:04:18,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:04:18,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-05 21:04:18,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-12-05 21:04:18,201 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:04:18,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 439 transitions, 8137 flow. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:18,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:04:18,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:04:18,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:04:19,199 INFO L130 PetriNetUnfolder]: 1487/3196 cut-off events. [2022-12-05 21:04:19,200 INFO L131 PetriNetUnfolder]: For 53328/53328 co-relation queries the response was YES. [2022-12-05 21:04:19,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24121 conditions, 3196 events. 1487/3196 cut-off events. For 53328/53328 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 24593 event pairs, 626 based on Foata normal form. 4/3200 useless extension candidates. Maximal degree in co-relation 23795. Up to 2933 conditions per place. [2022-12-05 21:04:19,224 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 358 selfloop transitions, 86 changer transitions 5/449 dead transitions. [2022-12-05 21:04:19,224 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 449 transitions, 9048 flow [2022-12-05 21:04:19,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-05 21:04:19,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-05 21:04:19,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 42 transitions. [2022-12-05 21:04:19,225 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.24705882352941178 [2022-12-05 21:04:19,225 INFO L175 Difference]: Start difference. First operand has 256 places, 439 transitions, 8137 flow. Second operand 10 states and 42 transitions. [2022-12-05 21:04:19,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 449 transitions, 9048 flow [2022-12-05 21:04:19,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 449 transitions, 8730 flow, removed 13 selfloop flow, removed 10 redundant places. [2022-12-05 21:04:19,473 INFO L231 Difference]: Finished difference. Result has 255 places, 434 transitions, 7898 flow [2022-12-05 21:04:19,473 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=7771, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7898, PETRI_PLACES=255, PETRI_TRANSITIONS=434} [2022-12-05 21:04:19,473 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 234 predicate places. [2022-12-05 21:04:19,473 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 434 transitions, 7898 flow [2022-12-05 21:04:19,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:19,474 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:04:19,474 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:04:19,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-05 21:04:19,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-05 21:04:19,674 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:04:19,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:04:19,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1884918853, now seen corresponding path program 16 times [2022-12-05 21:04:19,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:04:19,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341358450] [2022-12-05 21:04:19,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:04:19,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:04:19,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:04:20,167 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:20,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:04:20,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341358450] [2022-12-05 21:04:20,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341358450] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:04:20,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209253258] [2022-12-05 21:04:20,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:04:20,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:04:20,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:04:20,172 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:04:20,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-05 21:04:20,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:04:20,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:04:20,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-05 21:04:20,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:04:20,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-05 21:04:20,490 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:20,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:04:20,670 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:04:20,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 42 [2022-12-05 21:04:20,716 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:20,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209253258] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:04:20,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:04:20,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-12-05 21:04:20,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114511258] [2022-12-05 21:04:20,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:04:20,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-05 21:04:20,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:04:20,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-05 21:04:20,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-12-05 21:04:20,718 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:04:20,718 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 434 transitions, 7898 flow. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:20,718 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:04:20,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:04:20,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:04:21,831 INFO L130 PetriNetUnfolder]: 1457/3070 cut-off events. [2022-12-05 21:04:21,831 INFO L131 PetriNetUnfolder]: For 49508/49508 co-relation queries the response was YES. [2022-12-05 21:04:21,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23120 conditions, 3070 events. 1457/3070 cut-off events. For 49508/49508 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 23051 event pairs, 332 based on Foata normal form. 32/3102 useless extension candidates. Maximal degree in co-relation 23019. Up to 1656 conditions per place. [2022-12-05 21:04:21,858 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 329 selfloop transitions, 137 changer transitions 0/466 dead transitions. [2022-12-05 21:04:21,859 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 466 transitions, 9191 flow [2022-12-05 21:04:21,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-05 21:04:21,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-05 21:04:21,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 60 transitions. [2022-12-05 21:04:21,859 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.29411764705882354 [2022-12-05 21:04:21,860 INFO L175 Difference]: Start difference. First operand has 255 places, 434 transitions, 7898 flow. Second operand 12 states and 60 transitions. [2022-12-05 21:04:21,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 466 transitions, 9191 flow [2022-12-05 21:04:22,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 466 transitions, 8974 flow, removed 18 selfloop flow, removed 11 redundant places. [2022-12-05 21:04:22,110 INFO L231 Difference]: Finished difference. Result has 250 places, 430 transitions, 7891 flow [2022-12-05 21:04:22,110 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=7550, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7891, PETRI_PLACES=250, PETRI_TRANSITIONS=430} [2022-12-05 21:04:22,111 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 229 predicate places. [2022-12-05 21:04:22,111 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 430 transitions, 7891 flow [2022-12-05 21:04:22,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:22,111 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:04:22,111 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:04:22,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-05 21:04:22,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:04:22,312 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:04:22,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:04:22,312 INFO L85 PathProgramCache]: Analyzing trace with hash 713516997, now seen corresponding path program 17 times [2022-12-05 21:04:22,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:04:22,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151043657] [2022-12-05 21:04:22,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:04:22,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:04:22,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:04:22,836 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:22,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:04:22,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151043657] [2022-12-05 21:04:22,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151043657] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:04:22,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127998015] [2022-12-05 21:04:22,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:04:22,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:04:22,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:04:22,838 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:04:22,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-05 21:04:22,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-05 21:04:22,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:04:22,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-05 21:04:22,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:04:23,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:04:23,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-12-05 21:04:23,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 50 [2022-12-05 21:04:23,218 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:23,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:04:23,387 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:04:23,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 77 [2022-12-05 21:04:23,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-05 21:04:23,479 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:23,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127998015] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:04:23,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:04:23,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2022-12-05 21:04:23,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550617005] [2022-12-05 21:04:23,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:04:23,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-05 21:04:23,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:04:23,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-05 21:04:23,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=550, Unknown=5, NotChecked=0, Total=650 [2022-12-05 21:04:23,481 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:04:23,481 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 430 transitions, 7891 flow. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:23,481 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:04:23,481 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:04:23,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:04:24,659 INFO L130 PetriNetUnfolder]: 1449/3062 cut-off events. [2022-12-05 21:04:24,659 INFO L131 PetriNetUnfolder]: For 52178/52178 co-relation queries the response was YES. [2022-12-05 21:04:24,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23473 conditions, 3062 events. 1449/3062 cut-off events. For 52178/52178 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 23055 event pairs, 448 based on Foata normal form. 8/3070 useless extension candidates. Maximal degree in co-relation 23375. Up to 1898 conditions per place. [2022-12-05 21:04:24,681 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 312 selfloop transitions, 126 changer transitions 18/456 dead transitions. [2022-12-05 21:04:24,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 456 transitions, 9053 flow [2022-12-05 21:04:24,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-05 21:04:24,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-05 21:04:24,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 50 transitions. [2022-12-05 21:04:24,681 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.36764705882352944 [2022-12-05 21:04:24,682 INFO L175 Difference]: Start difference. First operand has 250 places, 430 transitions, 7891 flow. Second operand 8 states and 50 transitions. [2022-12-05 21:04:24,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 456 transitions, 9053 flow [2022-12-05 21:04:24,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 456 transitions, 8918 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-12-05 21:04:24,893 INFO L231 Difference]: Finished difference. Result has 250 places, 417 transitions, 7766 flow [2022-12-05 21:04:24,893 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=7734, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7766, PETRI_PLACES=250, PETRI_TRANSITIONS=417} [2022-12-05 21:04:24,893 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 229 predicate places. [2022-12-05 21:04:24,894 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 417 transitions, 7766 flow [2022-12-05 21:04:24,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:24,894 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:04:24,894 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:04:24,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-05 21:04:25,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:04:25,100 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:04:25,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:04:25,101 INFO L85 PathProgramCache]: Analyzing trace with hash 414456251, now seen corresponding path program 18 times [2022-12-05 21:04:25,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:04:25,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056336561] [2022-12-05 21:04:25,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:04:25,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:04:25,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:04:25,563 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:25,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:04:25,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056336561] [2022-12-05 21:04:25,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056336561] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:04:25,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513694661] [2022-12-05 21:04:25,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:04:25,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:04:25,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:04:25,566 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:04:25,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-05 21:04:25,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-05 21:04:25,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:04:25,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-05 21:04:25,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:04:25,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:04:25,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2022-12-05 21:04:26,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 78 [2022-12-05 21:04:26,192 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:26,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:04:26,461 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:04:26,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 85 [2022-12-05 21:04:26,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-05 21:04:26,563 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:26,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513694661] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:04:26,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:04:26,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2022-12-05 21:04:26,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583004356] [2022-12-05 21:04:26,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:04:26,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-05 21:04:26,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:04:26,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-05 21:04:26,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=548, Unknown=1, NotChecked=0, Total=650 [2022-12-05 21:04:26,565 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:04:26,565 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 417 transitions, 7766 flow. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:26,565 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:04:26,565 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:04:26,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:04:27,796 INFO L130 PetriNetUnfolder]: 1373/2890 cut-off events. [2022-12-05 21:04:27,796 INFO L131 PetriNetUnfolder]: For 50905/50905 co-relation queries the response was YES. [2022-12-05 21:04:27,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22295 conditions, 2890 events. 1373/2890 cut-off events. For 50905/50905 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 21393 event pairs, 406 based on Foata normal form. 24/2914 useless extension candidates. Maximal degree in co-relation 22196. Up to 1906 conditions per place. [2022-12-05 21:04:27,819 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 321 selfloop transitions, 121 changer transitions 9/451 dead transitions. [2022-12-05 21:04:27,819 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 451 transitions, 8873 flow [2022-12-05 21:04:27,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-05 21:04:27,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-05 21:04:27,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 78 transitions. [2022-12-05 21:04:27,820 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.38235294117647056 [2022-12-05 21:04:27,820 INFO L175 Difference]: Start difference. First operand has 250 places, 417 transitions, 7766 flow. Second operand 12 states and 78 transitions. [2022-12-05 21:04:27,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 451 transitions, 8873 flow [2022-12-05 21:04:28,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 451 transitions, 8711 flow, removed 10 selfloop flow, removed 5 redundant places. [2022-12-05 21:04:28,033 INFO L231 Difference]: Finished difference. Result has 254 places, 409 transitions, 7698 flow [2022-12-05 21:04:28,034 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=7502, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7698, PETRI_PLACES=254, PETRI_TRANSITIONS=409} [2022-12-05 21:04:28,034 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 233 predicate places. [2022-12-05 21:04:28,034 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 409 transitions, 7698 flow [2022-12-05 21:04:28,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:28,034 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:04:28,034 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:04:28,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-05 21:04:28,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:04:28,235 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:04:28,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:04:28,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1903014073, now seen corresponding path program 19 times [2022-12-05 21:04:28,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:04:28,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108105918] [2022-12-05 21:04:28,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:04:28,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:04:28,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:04:28,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:28,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:04:28,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108105918] [2022-12-05 21:04:28,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108105918] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:04:28,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078906392] [2022-12-05 21:04:28,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:04:28,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:04:28,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:04:28,704 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:04:28,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-05 21:04:28,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:04:28,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-05 21:04:28,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:04:28,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:04:28,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 61 [2022-12-05 21:04:29,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2022-12-05 21:04:29,192 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:29,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:04:29,431 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:04:29,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 99 [2022-12-05 21:04:29,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-05 21:04:29,564 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:29,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078906392] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:04:29,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:04:29,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-12-05 21:04:29,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346138210] [2022-12-05 21:04:29,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:04:29,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-05 21:04:29,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:04:29,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-05 21:04:29,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=500, Unknown=1, NotChecked=0, Total=600 [2022-12-05 21:04:29,566 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:04:29,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 409 transitions, 7698 flow. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:29,566 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:04:29,566 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:04:29,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:04:30,807 INFO L130 PetriNetUnfolder]: 1353/2812 cut-off events. [2022-12-05 21:04:30,807 INFO L131 PetriNetUnfolder]: For 48235/48235 co-relation queries the response was YES. [2022-12-05 21:04:30,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21751 conditions, 2812 events. 1353/2812 cut-off events. For 48235/48235 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 20471 event pairs, 398 based on Foata normal form. 8/2820 useless extension candidates. Maximal degree in co-relation 21652. Up to 1906 conditions per place. [2022-12-05 21:04:30,832 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 315 selfloop transitions, 117 changer transitions 0/432 dead transitions. [2022-12-05 21:04:30,832 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 432 transitions, 8621 flow [2022-12-05 21:04:30,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-05 21:04:30,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-05 21:04:30,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 64 transitions. [2022-12-05 21:04:30,833 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3764705882352941 [2022-12-05 21:04:30,833 INFO L175 Difference]: Start difference. First operand has 254 places, 409 transitions, 7698 flow. Second operand 10 states and 64 transitions. [2022-12-05 21:04:30,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 432 transitions, 8621 flow [2022-12-05 21:04:31,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 432 transitions, 8341 flow, removed 12 selfloop flow, removed 10 redundant places. [2022-12-05 21:04:31,057 INFO L231 Difference]: Finished difference. Result has 251 places, 405 transitions, 7550 flow [2022-12-05 21:04:31,057 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=7316, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7550, PETRI_PLACES=251, PETRI_TRANSITIONS=405} [2022-12-05 21:04:31,057 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 230 predicate places. [2022-12-05 21:04:31,057 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 405 transitions, 7550 flow [2022-12-05 21:04:31,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:31,058 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:04:31,058 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:04:31,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-05 21:04:31,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-05 21:04:31,263 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:04:31,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:04:31,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1877389335, now seen corresponding path program 20 times [2022-12-05 21:04:31,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:04:31,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336426017] [2022-12-05 21:04:31,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:04:31,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:04:31,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:04:31,683 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:31,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:04:31,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336426017] [2022-12-05 21:04:31,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336426017] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:04:31,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731584573] [2022-12-05 21:04:31,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:04:31,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:04:31,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:04:31,686 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:04:31,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-05 21:04:31,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:04:31,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:04:31,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-05 21:04:31,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:04:31,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-05 21:04:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:31,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:04:32,129 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:04:32,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2022-12-05 21:04:32,179 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:32,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731584573] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:04:32,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:04:32,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2022-12-05 21:04:32,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426801990] [2022-12-05 21:04:32,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:04:32,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-05 21:04:32,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:04:32,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-05 21:04:32,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-12-05 21:04:32,181 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:04:32,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 405 transitions, 7550 flow. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:32,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:04:32,181 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:04:32,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:04:32,990 INFO L130 PetriNetUnfolder]: 1345/2792 cut-off events. [2022-12-05 21:04:32,990 INFO L131 PetriNetUnfolder]: For 47469/47469 co-relation queries the response was YES. [2022-12-05 21:04:33,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21549 conditions, 2792 events. 1345/2792 cut-off events. For 47469/47469 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 20236 event pairs, 482 based on Foata normal form. 16/2808 useless extension candidates. Maximal degree in co-relation 21452. Up to 2454 conditions per place. [2022-12-05 21:04:33,012 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 336 selfloop transitions, 78 changer transitions 0/414 dead transitions. [2022-12-05 21:04:33,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 414 transitions, 8433 flow [2022-12-05 21:04:33,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-05 21:04:33,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-05 21:04:33,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 40 transitions. [2022-12-05 21:04:33,015 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.29411764705882354 [2022-12-05 21:04:33,015 INFO L175 Difference]: Start difference. First operand has 251 places, 405 transitions, 7550 flow. Second operand 8 states and 40 transitions. [2022-12-05 21:04:33,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 414 transitions, 8433 flow [2022-12-05 21:04:33,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 414 transitions, 8177 flow, removed 3 selfloop flow, removed 12 redundant places. [2022-12-05 21:04:33,222 INFO L231 Difference]: Finished difference. Result has 247 places, 402 transitions, 7431 flow [2022-12-05 21:04:33,223 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=7201, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7431, PETRI_PLACES=247, PETRI_TRANSITIONS=402} [2022-12-05 21:04:33,223 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 226 predicate places. [2022-12-05 21:04:33,223 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 402 transitions, 7431 flow [2022-12-05 21:04:33,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:33,224 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:04:33,224 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:04:33,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-05 21:04:33,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-05 21:04:33,424 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:04:33,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:04:33,425 INFO L85 PathProgramCache]: Analyzing trace with hash -2034633515, now seen corresponding path program 21 times [2022-12-05 21:04:33,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:04:33,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448248866] [2022-12-05 21:04:33,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:04:33,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:04:33,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:04:33,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:33,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:04:33,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448248866] [2022-12-05 21:04:33,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448248866] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:04:33,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786417657] [2022-12-05 21:04:33,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:04:33,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:04:33,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:04:33,908 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:04:33,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-05 21:04:34,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 21:04:34,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:04:34,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-05 21:04:34,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:04:34,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:04:34,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 61 [2022-12-05 21:04:34,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 61 [2022-12-05 21:04:34,533 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:34,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:04:34,799 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:04:34,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 85 [2022-12-05 21:04:34,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-05 21:04:34,901 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:34,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786417657] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:04:34,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:04:34,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2022-12-05 21:04:34,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045877137] [2022-12-05 21:04:34,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:04:34,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-05 21:04:34,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:04:34,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-05 21:04:34,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=543, Unknown=1, NotChecked=0, Total=650 [2022-12-05 21:04:34,903 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:04:34,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 402 transitions, 7431 flow. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:34,903 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:04:34,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:04:34,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:04:36,045 INFO L130 PetriNetUnfolder]: 1325/2752 cut-off events. [2022-12-05 21:04:36,045 INFO L131 PetriNetUnfolder]: For 46279/46279 co-relation queries the response was YES. [2022-12-05 21:04:36,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21130 conditions, 2752 events. 1325/2752 cut-off events. For 46279/46279 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 19956 event pairs, 398 based on Foata normal form. 8/2760 useless extension candidates. Maximal degree in co-relation 21034. Up to 1914 conditions per place. [2022-12-05 21:04:36,071 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 302 selfloop transitions, 111 changer transitions 10/423 dead transitions. [2022-12-05 21:04:36,071 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 423 transitions, 8400 flow [2022-12-05 21:04:36,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-05 21:04:36,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-05 21:04:36,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 56 transitions. [2022-12-05 21:04:36,072 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.32941176470588235 [2022-12-05 21:04:36,072 INFO L175 Difference]: Start difference. First operand has 247 places, 402 transitions, 7431 flow. Second operand 10 states and 56 transitions. [2022-12-05 21:04:36,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 423 transitions, 8400 flow [2022-12-05 21:04:36,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 423 transitions, 8213 flow, removed 13 selfloop flow, removed 7 redundant places. [2022-12-05 21:04:36,296 INFO L231 Difference]: Finished difference. Result has 249 places, 396 transitions, 7359 flow [2022-12-05 21:04:36,296 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=7216, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7359, PETRI_PLACES=249, PETRI_TRANSITIONS=396} [2022-12-05 21:04:36,297 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 228 predicate places. [2022-12-05 21:04:36,297 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 396 transitions, 7359 flow [2022-12-05 21:04:36,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:36,297 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:04:36,297 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:04:36,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-05 21:04:36,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-05 21:04:36,499 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:04:36,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:04:36,500 INFO L85 PathProgramCache]: Analyzing trace with hash -798884709, now seen corresponding path program 22 times [2022-12-05 21:04:36,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:04:36,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890820456] [2022-12-05 21:04:36,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:04:36,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:04:36,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:04:36,850 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:36,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:04:36,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890820456] [2022-12-05 21:04:36,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890820456] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:04:36,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989353341] [2022-12-05 21:04:36,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:04:36,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:04:36,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:04:36,852 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:04:36,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-05 21:04:36,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:04:36,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:04:36,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-05 21:04:36,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:04:37,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2022-12-05 21:04:37,242 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:37,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:04:37,396 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:04:37,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 73 [2022-12-05 21:04:37,486 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:37,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989353341] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:04:37,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:04:37,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2022-12-05 21:04:37,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446505178] [2022-12-05 21:04:37,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:04:37,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-05 21:04:37,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:04:37,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-05 21:04:37,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-12-05 21:04:37,488 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:04:37,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 396 transitions, 7359 flow. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:37,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:04:37,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:04:37,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:04:38,387 INFO L130 PetriNetUnfolder]: 1297/2660 cut-off events. [2022-12-05 21:04:38,387 INFO L131 PetriNetUnfolder]: For 44335/44335 co-relation queries the response was YES. [2022-12-05 21:04:38,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20570 conditions, 2660 events. 1297/2660 cut-off events. For 44335/44335 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 18866 event pairs, 438 based on Foata normal form. 8/2668 useless extension candidates. Maximal degree in co-relation 20476. Up to 2270 conditions per place. [2022-12-05 21:04:38,411 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 337 selfloop transitions, 76 changer transitions 0/413 dead transitions. [2022-12-05 21:04:38,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 413 transitions, 8204 flow [2022-12-05 21:04:38,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-05 21:04:38,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-05 21:04:38,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 55 transitions. [2022-12-05 21:04:38,412 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3235294117647059 [2022-12-05 21:04:38,412 INFO L175 Difference]: Start difference. First operand has 249 places, 396 transitions, 7359 flow. Second operand 10 states and 55 transitions. [2022-12-05 21:04:38,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 413 transitions, 8204 flow [2022-12-05 21:04:38,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 413 transitions, 7968 flow, removed 7 selfloop flow, removed 9 redundant places. [2022-12-05 21:04:38,629 INFO L231 Difference]: Finished difference. Result has 244 places, 390 transitions, 7163 flow [2022-12-05 21:04:38,629 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=7011, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7163, PETRI_PLACES=244, PETRI_TRANSITIONS=390} [2022-12-05 21:04:38,630 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 223 predicate places. [2022-12-05 21:04:38,630 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 390 transitions, 7163 flow [2022-12-05 21:04:38,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:38,630 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:04:38,630 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:04:38,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-05 21:04:38,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:04:38,831 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:04:38,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:04:38,832 INFO L85 PathProgramCache]: Analyzing trace with hash 95476181, now seen corresponding path program 23 times [2022-12-05 21:04:38,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:04:38,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207401507] [2022-12-05 21:04:38,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:04:38,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:04:38,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:04:39,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:39,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:04:39,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207401507] [2022-12-05 21:04:39,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207401507] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:04:39,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388974695] [2022-12-05 21:04:39,258 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:04:39,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:04:39,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:04:39,260 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:04:39,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-05 21:04:39,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-05 21:04:39,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:04:39,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-05 21:04:39,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:04:39,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 30 [2022-12-05 21:04:39,505 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:39,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:04:39,592 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-12-05 21:04:39,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 46 [2022-12-05 21:04:39,630 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:39,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388974695] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:04:39,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:04:39,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-12-05 21:04:39,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142379958] [2022-12-05 21:04:39,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:04:39,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-05 21:04:39,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:04:39,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-05 21:04:39,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-12-05 21:04:39,631 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:04:39,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 390 transitions, 7163 flow. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:39,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:04:39,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:04:39,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:04:40,343 INFO L130 PetriNetUnfolder]: 1263/2598 cut-off events. [2022-12-05 21:04:40,344 INFO L131 PetriNetUnfolder]: For 42283/42283 co-relation queries the response was YES. [2022-12-05 21:04:40,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20070 conditions, 2598 events. 1263/2598 cut-off events. For 42283/42283 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 18431 event pairs, 230 based on Foata normal form. 8/2606 useless extension candidates. Maximal degree in co-relation 19978. Up to 1350 conditions per place. [2022-12-05 21:04:40,365 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 319 selfloop transitions, 82 changer transitions 10/411 dead transitions. [2022-12-05 21:04:40,365 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 411 transitions, 8224 flow [2022-12-05 21:04:40,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 21:04:40,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 21:04:40,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 45 transitions. [2022-12-05 21:04:40,366 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.29411764705882354 [2022-12-05 21:04:40,366 INFO L175 Difference]: Start difference. First operand has 244 places, 390 transitions, 7163 flow. Second operand 9 states and 45 transitions. [2022-12-05 21:04:40,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 411 transitions, 8224 flow [2022-12-05 21:04:40,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 411 transitions, 8072 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-12-05 21:04:40,532 INFO L231 Difference]: Finished difference. Result has 243 places, 383 transitions, 7067 flow [2022-12-05 21:04:40,533 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=6968, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7067, PETRI_PLACES=243, PETRI_TRANSITIONS=383} [2022-12-05 21:04:40,533 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 222 predicate places. [2022-12-05 21:04:40,533 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 383 transitions, 7067 flow [2022-12-05 21:04:40,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:40,533 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:04:40,533 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:04:40,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-05 21:04:40,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:04:40,739 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:04:40,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:04:40,739 INFO L85 PathProgramCache]: Analyzing trace with hash 353658495, now seen corresponding path program 24 times [2022-12-05 21:04:40,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:04:40,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13117402] [2022-12-05 21:04:40,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:04:40,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:04:40,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:04:41,440 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:04:41,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:04:41,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13117402] [2022-12-05 21:04:41,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13117402] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:04:41,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539932378] [2022-12-05 21:04:41,441 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:04:41,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:04:41,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:04:41,442 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:04:41,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-05 21:04:41,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-05 21:04:41,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:04:41,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-05 21:04:41,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:04:41,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 48 [2022-12-05 21:04:41,757 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:41,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:04:41,892 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:04:41,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 57 [2022-12-05 21:04:41,941 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:41,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539932378] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:04:41,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:04:41,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 24 [2022-12-05 21:04:41,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916632575] [2022-12-05 21:04:41,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:04:41,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-05 21:04:41,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:04:41,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-05 21:04:41,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-12-05 21:04:41,943 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:04:41,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 383 transitions, 7067 flow. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:41,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:04:41,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:04:41,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:04:42,916 INFO L130 PetriNetUnfolder]: 1251/2570 cut-off events. [2022-12-05 21:04:42,916 INFO L131 PetriNetUnfolder]: For 44974/44974 co-relation queries the response was YES. [2022-12-05 21:04:42,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20076 conditions, 2570 events. 1251/2570 cut-off events. For 44974/44974 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 18191 event pairs, 236 based on Foata normal form. 4/2574 useless extension candidates. Maximal degree in co-relation 19984. Up to 1371 conditions per place. [2022-12-05 21:04:42,936 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 266 selfloop transitions, 142 changer transitions 6/414 dead transitions. [2022-12-05 21:04:42,936 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 414 transitions, 8300 flow [2022-12-05 21:04:42,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 21:04:42,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 21:04:42,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 45 transitions. [2022-12-05 21:04:42,937 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.29411764705882354 [2022-12-05 21:04:42,937 INFO L175 Difference]: Start difference. First operand has 243 places, 383 transitions, 7067 flow. Second operand 9 states and 45 transitions. [2022-12-05 21:04:42,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 414 transitions, 8300 flow [2022-12-05 21:04:43,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 414 transitions, 8153 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-12-05 21:04:43,150 INFO L231 Difference]: Finished difference. Result has 244 places, 382 transitions, 7312 flow [2022-12-05 21:04:43,150 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=6904, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7312, PETRI_PLACES=244, PETRI_TRANSITIONS=382} [2022-12-05 21:04:43,150 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 223 predicate places. [2022-12-05 21:04:43,150 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 382 transitions, 7312 flow [2022-12-05 21:04:43,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:43,151 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:04:43,151 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:04:43,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-05 21:04:43,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-12-05 21:04:43,351 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:04:43,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:04:43,352 INFO L85 PathProgramCache]: Analyzing trace with hash 916485767, now seen corresponding path program 25 times [2022-12-05 21:04:43,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:04:43,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480001423] [2022-12-05 21:04:43,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:04:43,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:04:43,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:04:44,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:04:44,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:04:44,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480001423] [2022-12-05 21:04:44,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480001423] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:04:44,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038624342] [2022-12-05 21:04:44,246 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:04:44,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:04:44,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:04:44,248 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:04:44,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-05 21:04:44,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:04:44,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-05 21:04:44,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:04:44,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 91 [2022-12-05 21:04:44,669 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:44,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:04:44,852 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:04:44,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 59 [2022-12-05 21:04:44,943 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:44,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038624342] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:04:44,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:04:44,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 7] total 25 [2022-12-05 21:04:44,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457153862] [2022-12-05 21:04:44,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:04:44,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-05 21:04:44,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:04:44,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-05 21:04:44,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-12-05 21:04:44,945 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:04:44,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 382 transitions, 7312 flow. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:44,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:04:44,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:04:44,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:04:45,947 INFO L130 PetriNetUnfolder]: 1231/2526 cut-off events. [2022-12-05 21:04:45,948 INFO L131 PetriNetUnfolder]: For 44445/44445 co-relation queries the response was YES. [2022-12-05 21:04:45,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20562 conditions, 2526 events. 1231/2526 cut-off events. For 44445/44445 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 17666 event pairs, 422 based on Foata normal form. 12/2538 useless extension candidates. Maximal degree in co-relation 20468. Up to 2169 conditions per place. [2022-12-05 21:04:45,970 INFO L137 encePairwiseOnDemand]: 9/17 looper letters, 324 selfloop transitions, 72 changer transitions 6/402 dead transitions. [2022-12-05 21:04:45,971 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 402 transitions, 8186 flow [2022-12-05 21:04:45,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-05 21:04:45,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-05 21:04:45,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 59 transitions. [2022-12-05 21:04:45,972 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.28921568627450983 [2022-12-05 21:04:45,972 INFO L175 Difference]: Start difference. First operand has 244 places, 382 transitions, 7312 flow. Second operand 12 states and 59 transitions. [2022-12-05 21:04:45,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 402 transitions, 8186 flow [2022-12-05 21:04:46,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 402 transitions, 7947 flow, removed 50 selfloop flow, removed 4 redundant places. [2022-12-05 21:04:46,156 INFO L231 Difference]: Finished difference. Result has 249 places, 376 transitions, 7090 flow [2022-12-05 21:04:46,157 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=7024, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7090, PETRI_PLACES=249, PETRI_TRANSITIONS=376} [2022-12-05 21:04:46,157 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 228 predicate places. [2022-12-05 21:04:46,157 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 376 transitions, 7090 flow [2022-12-05 21:04:46,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:46,157 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:04:46,157 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:04:46,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-05 21:04:46,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-12-05 21:04:46,358 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:04:46,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:04:46,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1691714581, now seen corresponding path program 26 times [2022-12-05 21:04:46,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:04:46,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527528624] [2022-12-05 21:04:46,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:04:46,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:04:46,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:04:46,966 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:04:46,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:04:46,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527528624] [2022-12-05 21:04:46,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527528624] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:04:46,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018938943] [2022-12-05 21:04:46,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:04:46,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:04:46,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:04:46,968 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:04:46,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-05 21:04:47,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:04:47,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:04:47,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-05 21:04:47,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:04:47,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 50 [2022-12-05 21:04:47,304 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:47,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:04:47,466 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:04:47,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 71 [2022-12-05 21:04:47,520 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:47,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018938943] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:04:47,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:04:47,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 23 [2022-12-05 21:04:47,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859512815] [2022-12-05 21:04:47,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:04:47,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-05 21:04:47,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:04:47,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-05 21:04:47,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-12-05 21:04:47,521 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:04:47,521 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 376 transitions, 7090 flow. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:47,521 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:04:47,522 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:04:47,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:04:48,724 INFO L130 PetriNetUnfolder]: 1235/2526 cut-off events. [2022-12-05 21:04:48,725 INFO L131 PetriNetUnfolder]: For 44788/44788 co-relation queries the response was YES. [2022-12-05 21:04:48,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20272 conditions, 2526 events. 1235/2526 cut-off events. For 44788/44788 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 17659 event pairs, 182 based on Foata normal form. 12/2538 useless extension candidates. Maximal degree in co-relation 20178. Up to 690 conditions per place. [2022-12-05 21:04:48,746 INFO L137 encePairwiseOnDemand]: 9/17 looper letters, 229 selfloop transitions, 190 changer transitions 4/423 dead transitions. [2022-12-05 21:04:48,746 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 423 transitions, 8543 flow [2022-12-05 21:04:48,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-05 21:04:48,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-05 21:04:48,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 70 transitions. [2022-12-05 21:04:48,747 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.29411764705882354 [2022-12-05 21:04:48,747 INFO L175 Difference]: Start difference. First operand has 249 places, 376 transitions, 7090 flow. Second operand 14 states and 70 transitions. [2022-12-05 21:04:48,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 423 transitions, 8543 flow [2022-12-05 21:04:48,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 423 transitions, 8397 flow, removed 1 selfloop flow, removed 11 redundant places. [2022-12-05 21:04:48,928 INFO L231 Difference]: Finished difference. Result has 252 places, 383 transitions, 7696 flow [2022-12-05 21:04:48,928 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=6921, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7696, PETRI_PLACES=252, PETRI_TRANSITIONS=383} [2022-12-05 21:04:48,929 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 231 predicate places. [2022-12-05 21:04:48,929 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 383 transitions, 7696 flow [2022-12-05 21:04:48,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:48,929 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:04:48,929 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:04:48,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-12-05 21:04:49,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:04:49,134 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:04:49,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:04:49,135 INFO L85 PathProgramCache]: Analyzing trace with hash 966375511, now seen corresponding path program 27 times [2022-12-05 21:04:49,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:04:49,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101498053] [2022-12-05 21:04:49,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:04:49,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:04:49,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:04:49,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:04:49,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:04:49,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101498053] [2022-12-05 21:04:49,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101498053] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:04:49,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173011016] [2022-12-05 21:04:49,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:04:49,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:04:49,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:04:49,808 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:04:49,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-05 21:04:49,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 21:04:49,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:04:49,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-05 21:04:49,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:04:50,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2022-12-05 21:04:50,184 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:50,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:04:50,350 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:04:50,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 57 [2022-12-05 21:04:50,412 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:50,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173011016] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:04:50,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:04:50,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 24 [2022-12-05 21:04:50,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548608737] [2022-12-05 21:04:50,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:04:50,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-05 21:04:50,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:04:50,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-05 21:04:50,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-12-05 21:04:50,413 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:04:50,413 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 383 transitions, 7696 flow. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:50,413 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:04:50,413 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:04:50,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:04:52,036 INFO L130 PetriNetUnfolder]: 1277/2640 cut-off events. [2022-12-05 21:04:52,036 INFO L131 PetriNetUnfolder]: For 51618/51618 co-relation queries the response was YES. [2022-12-05 21:04:52,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22031 conditions, 2640 events. 1277/2640 cut-off events. For 51618/51618 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 18786 event pairs, 252 based on Foata normal form. 12/2652 useless extension candidates. Maximal degree in co-relation 21934. Up to 1237 conditions per place. [2022-12-05 21:04:52,065 INFO L137 encePairwiseOnDemand]: 9/17 looper letters, 258 selfloop transitions, 173 changer transitions 2/433 dead transitions. [2022-12-05 21:04:52,065 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 433 transitions, 8960 flow [2022-12-05 21:04:52,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-05 21:04:52,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-05 21:04:52,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 86 transitions. [2022-12-05 21:04:52,066 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.26625386996904027 [2022-12-05 21:04:52,066 INFO L175 Difference]: Start difference. First operand has 252 places, 383 transitions, 7696 flow. Second operand 19 states and 86 transitions. [2022-12-05 21:04:52,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 433 transitions, 8960 flow [2022-12-05 21:04:52,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 433 transitions, 8806 flow, removed 35 selfloop flow, removed 7 redundant places. [2022-12-05 21:04:52,280 INFO L231 Difference]: Finished difference. Result has 262 places, 380 transitions, 7835 flow [2022-12-05 21:04:52,281 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=7421, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7835, PETRI_PLACES=262, PETRI_TRANSITIONS=380} [2022-12-05 21:04:52,281 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 241 predicate places. [2022-12-05 21:04:52,281 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 380 transitions, 7835 flow [2022-12-05 21:04:52,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:52,281 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:04:52,281 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:04:52,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-12-05 21:04:52,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:04:52,487 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:04:52,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:04:52,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1027146805, now seen corresponding path program 28 times [2022-12-05 21:04:52,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:04:52,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365339385] [2022-12-05 21:04:52,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:04:52,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:04:52,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:04:53,075 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:04:53,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:04:53,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365339385] [2022-12-05 21:04:53,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365339385] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:04:53,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761272742] [2022-12-05 21:04:53,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:04:53,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:04:53,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:04:53,080 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:04:53,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-05 21:04:53,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:04:53,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:04:53,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-05 21:04:53,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:04:53,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2022-12-05 21:04:53,544 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:53,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:04:53,769 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:04:53,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 71 [2022-12-05 21:04:53,817 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:53,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761272742] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:04:53,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:04:53,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 22 [2022-12-05 21:04:53,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534555623] [2022-12-05 21:04:53,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:04:53,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-05 21:04:53,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:04:53,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-05 21:04:53,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-12-05 21:04:53,819 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:04:53,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 380 transitions, 7835 flow. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:53,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:04:53,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:04:53,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:04:54,869 INFO L130 PetriNetUnfolder]: 1255/2558 cut-off events. [2022-12-05 21:04:54,869 INFO L131 PetriNetUnfolder]: For 54846/54846 co-relation queries the response was YES. [2022-12-05 21:04:54,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21825 conditions, 2558 events. 1255/2558 cut-off events. For 54846/54846 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 17823 event pairs, 284 based on Foata normal form. 24/2582 useless extension candidates. Maximal degree in co-relation 21726. Up to 1503 conditions per place. [2022-12-05 21:04:54,891 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 261 selfloop transitions, 139 changer transitions 0/400 dead transitions. [2022-12-05 21:04:54,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 400 transitions, 8646 flow [2022-12-05 21:04:54,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-05 21:04:54,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-05 21:04:54,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 57 transitions. [2022-12-05 21:04:54,892 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3048128342245989 [2022-12-05 21:04:54,892 INFO L175 Difference]: Start difference. First operand has 262 places, 380 transitions, 7835 flow. Second operand 11 states and 57 transitions. [2022-12-05 21:04:54,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 400 transitions, 8646 flow [2022-12-05 21:04:55,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 400 transitions, 8226 flow, removed 24 selfloop flow, removed 15 redundant places. [2022-12-05 21:04:55,091 INFO L231 Difference]: Finished difference. Result has 255 places, 374 transitions, 7526 flow [2022-12-05 21:04:55,092 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=7248, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7526, PETRI_PLACES=255, PETRI_TRANSITIONS=374} [2022-12-05 21:04:55,092 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 234 predicate places. [2022-12-05 21:04:55,092 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 374 transitions, 7526 flow [2022-12-05 21:04:55,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:55,092 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:04:55,092 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:04:55,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-12-05 21:04:55,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:04:55,293 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:04:55,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:04:55,293 INFO L85 PathProgramCache]: Analyzing trace with hash 2108994453, now seen corresponding path program 29 times [2022-12-05 21:04:55,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:04:55,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295137300] [2022-12-05 21:04:55,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:04:55,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:04:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:04:55,613 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:55,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:04:55,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295137300] [2022-12-05 21:04:55,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295137300] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:04:55,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214041515] [2022-12-05 21:04:55,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:04:55,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:04:55,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:04:55,615 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:04:55,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-05 21:04:55,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-05 21:04:55,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:04:55,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-05 21:04:55,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:04:55,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 52 [2022-12-05 21:04:55,871 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:55,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:04:55,989 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:04:55,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 65 [2022-12-05 21:04:56,036 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:56,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214041515] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:04:56,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:04:56,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2022-12-05 21:04:56,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26948804] [2022-12-05 21:04:56,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:04:56,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-05 21:04:56,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:04:56,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-05 21:04:56,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-12-05 21:04:56,037 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:04:56,037 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 374 transitions, 7526 flow. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:56,037 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:04:56,037 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:04:56,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:04:56,806 INFO L130 PetriNetUnfolder]: 1233/2496 cut-off events. [2022-12-05 21:04:56,806 INFO L131 PetriNetUnfolder]: For 50042/50042 co-relation queries the response was YES. [2022-12-05 21:04:56,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21234 conditions, 2496 events. 1233/2496 cut-off events. For 50042/50042 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 17116 event pairs, 448 based on Foata normal form. 20/2516 useless extension candidates. Maximal degree in co-relation 21140. Up to 2216 conditions per place. [2022-12-05 21:04:56,828 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 309 selfloop transitions, 64 changer transitions 0/373 dead transitions. [2022-12-05 21:04:56,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 373 transitions, 8136 flow [2022-12-05 21:04:56,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-05 21:04:56,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-05 21:04:56,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 38 transitions. [2022-12-05 21:04:56,829 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.27941176470588236 [2022-12-05 21:04:56,829 INFO L175 Difference]: Start difference. First operand has 255 places, 374 transitions, 7526 flow. Second operand 8 states and 38 transitions. [2022-12-05 21:04:56,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 373 transitions, 8136 flow [2022-12-05 21:04:57,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 373 transitions, 7844 flow, removed 4 selfloop flow, removed 11 redundant places. [2022-12-05 21:04:57,038 INFO L231 Difference]: Finished difference. Result has 251 places, 363 transitions, 7168 flow [2022-12-05 21:04:57,039 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=6973, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7168, PETRI_PLACES=251, PETRI_TRANSITIONS=363} [2022-12-05 21:04:57,039 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 230 predicate places. [2022-12-05 21:04:57,039 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 363 transitions, 7168 flow [2022-12-05 21:04:57,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:57,040 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:04:57,040 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:04:57,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-12-05 21:04:57,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-12-05 21:04:57,245 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:04:57,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:04:57,245 INFO L85 PathProgramCache]: Analyzing trace with hash -447696443, now seen corresponding path program 30 times [2022-12-05 21:04:57,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:04:57,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931770926] [2022-12-05 21:04:57,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:04:57,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:04:57,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:04:57,590 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:57,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:04:57,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931770926] [2022-12-05 21:04:57,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931770926] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:04:57,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353886529] [2022-12-05 21:04:57,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:04:57,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:04:57,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:04:57,592 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:04:57,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-05 21:04:57,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-05 21:04:57,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:04:57,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-05 21:04:57,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:04:57,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-05 21:04:57,909 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:57,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:04:58,101 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:04:58,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2022-12-05 21:04:58,148 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:58,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353886529] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:04:58,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:04:58,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2022-12-05 21:04:58,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916250180] [2022-12-05 21:04:58,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:04:58,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-05 21:04:58,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:04:58,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-05 21:04:58,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-12-05 21:04:58,150 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:04:58,150 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 363 transitions, 7168 flow. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:58,151 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:04:58,151 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:04:58,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:04:58,883 INFO L130 PetriNetUnfolder]: 1235/2478 cut-off events. [2022-12-05 21:04:58,884 INFO L131 PetriNetUnfolder]: For 49149/49149 co-relation queries the response was YES. [2022-12-05 21:04:58,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20869 conditions, 2478 events. 1235/2478 cut-off events. For 49149/49149 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 16802 event pairs, 430 based on Foata normal form. 32/2510 useless extension candidates. Maximal degree in co-relation 20776. Up to 2174 conditions per place. [2022-12-05 21:04:58,905 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 313 selfloop transitions, 67 changer transitions 0/380 dead transitions. [2022-12-05 21:04:58,906 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 380 transitions, 8086 flow [2022-12-05 21:04:58,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-05 21:04:58,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-05 21:04:58,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 43 transitions. [2022-12-05 21:04:58,906 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3161764705882353 [2022-12-05 21:04:58,907 INFO L175 Difference]: Start difference. First operand has 251 places, 363 transitions, 7168 flow. Second operand 8 states and 43 transitions. [2022-12-05 21:04:58,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 380 transitions, 8086 flow [2022-12-05 21:04:59,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 380 transitions, 7938 flow, removed 13 selfloop flow, removed 6 redundant places. [2022-12-05 21:04:59,091 INFO L231 Difference]: Finished difference. Result has 252 places, 364 transitions, 7198 flow [2022-12-05 21:04:59,091 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=6932, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7198, PETRI_PLACES=252, PETRI_TRANSITIONS=364} [2022-12-05 21:04:59,091 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 231 predicate places. [2022-12-05 21:04:59,091 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 364 transitions, 7198 flow [2022-12-05 21:04:59,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:04:59,092 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:04:59,092 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:04:59,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-12-05 21:04:59,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-12-05 21:04:59,294 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:04:59,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:04:59,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1543837281, now seen corresponding path program 31 times [2022-12-05 21:04:59,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:04:59,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821138556] [2022-12-05 21:04:59,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:04:59,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:04:59,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:04:59,639 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:04:59,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:04:59,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821138556] [2022-12-05 21:04:59,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821138556] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:04:59,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104617136] [2022-12-05 21:04:59,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:04:59,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:04:59,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:04:59,644 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:04:59,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-05 21:04:59,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:04:59,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-05 21:04:59,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:05:00,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 93 [2022-12-05 21:05:00,113 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:05:00,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:05:00,298 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:05:00,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2022-12-05 21:05:00,351 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:05:00,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104617136] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:05:00,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:05:00,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2022-12-05 21:05:00,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934297897] [2022-12-05 21:05:00,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:05:00,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-05 21:05:00,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:05:00,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-05 21:05:00,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-12-05 21:05:00,353 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:05:00,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 364 transitions, 7198 flow. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:05:00,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:05:00,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:05:00,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:05:01,064 INFO L130 PetriNetUnfolder]: 1203/2394 cut-off events. [2022-12-05 21:05:01,064 INFO L131 PetriNetUnfolder]: For 45933/45933 co-relation queries the response was YES. [2022-12-05 21:05:01,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20354 conditions, 2394 events. 1203/2394 cut-off events. For 45933/45933 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 16034 event pairs, 392 based on Foata normal form. 8/2402 useless extension candidates. Maximal degree in co-relation 20260. Up to 2036 conditions per place. [2022-12-05 21:05:01,085 INFO L137 encePairwiseOnDemand]: 11/17 looper letters, 291 selfloop transitions, 83 changer transitions 0/374 dead transitions. [2022-12-05 21:05:01,085 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 374 transitions, 7937 flow [2022-12-05 21:05:01,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-05 21:05:01,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-05 21:05:01,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 47 transitions. [2022-12-05 21:05:01,086 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.27647058823529413 [2022-12-05 21:05:01,086 INFO L175 Difference]: Start difference. First operand has 252 places, 364 transitions, 7198 flow. Second operand 10 states and 47 transitions. [2022-12-05 21:05:01,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 374 transitions, 7937 flow [2022-12-05 21:05:01,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 374 transitions, 7518 flow, removed 20 selfloop flow, removed 13 redundant places. [2022-12-05 21:05:01,272 INFO L231 Difference]: Finished difference. Result has 246 places, 359 transitions, 6842 flow [2022-12-05 21:05:01,272 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=6569, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6842, PETRI_PLACES=246, PETRI_TRANSITIONS=359} [2022-12-05 21:05:01,272 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 225 predicate places. [2022-12-05 21:05:01,272 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 359 transitions, 6842 flow [2022-12-05 21:05:01,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:05:01,273 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:05:01,273 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:05:01,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-12-05 21:05:01,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-12-05 21:05:01,478 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:05:01,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:05:01,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1741604325, now seen corresponding path program 32 times [2022-12-05 21:05:01,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:05:01,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188344348] [2022-12-05 21:05:01,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:05:01,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:05:01,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:05:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:05:02,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:05:02,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188344348] [2022-12-05 21:05:02,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188344348] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:05:02,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485827649] [2022-12-05 21:05:02,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:05:02,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:05:02,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:05:02,158 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:05:02,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-05 21:05:02,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:05:02,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:05:02,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-05 21:05:02,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:05:02,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 53 [2022-12-05 21:05:02,526 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:05:02,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:05:02,646 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:05:02,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 59 [2022-12-05 21:05:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:05:02,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485827649] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:05:02,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:05:02,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 23 [2022-12-05 21:05:02,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126903873] [2022-12-05 21:05:02,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:05:02,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-05 21:05:02,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:05:02,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-05 21:05:02,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-12-05 21:05:02,721 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:05:02,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 359 transitions, 6842 flow. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:05:02,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:05:02,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:05:02,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:05:03,674 INFO L130 PetriNetUnfolder]: 1191/2350 cut-off events. [2022-12-05 21:05:03,674 INFO L131 PetriNetUnfolder]: For 43821/43821 co-relation queries the response was YES. [2022-12-05 21:05:03,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19593 conditions, 2350 events. 1191/2350 cut-off events. For 43821/43821 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 15533 event pairs, 398 based on Foata normal form. 4/2354 useless extension candidates. Maximal degree in co-relation 19500. Up to 2053 conditions per place. [2022-12-05 21:05:03,691 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 303 selfloop transitions, 67 changer transitions 5/375 dead transitions. [2022-12-05 21:05:03,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 375 transitions, 7665 flow [2022-12-05 21:05:03,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-05 21:05:03,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-05 21:05:03,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 48 transitions. [2022-12-05 21:05:03,692 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.25668449197860965 [2022-12-05 21:05:03,692 INFO L175 Difference]: Start difference. First operand has 246 places, 359 transitions, 6842 flow. Second operand 11 states and 48 transitions. [2022-12-05 21:05:03,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 375 transitions, 7665 flow [2022-12-05 21:05:03,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 375 transitions, 7493 flow, removed 15 selfloop flow, removed 7 redundant places. [2022-12-05 21:05:03,849 INFO L231 Difference]: Finished difference. Result has 249 places, 355 transitions, 6713 flow [2022-12-05 21:05:03,849 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=6647, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6713, PETRI_PLACES=249, PETRI_TRANSITIONS=355} [2022-12-05 21:05:03,850 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 228 predicate places. [2022-12-05 21:05:03,850 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 355 transitions, 6713 flow [2022-12-05 21:05:03,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:05:03,850 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:05:03,850 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:05:03,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-12-05 21:05:04,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-12-05 21:05:04,051 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:05:04,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:05:04,051 INFO L85 PathProgramCache]: Analyzing trace with hash -730616594, now seen corresponding path program 33 times [2022-12-05 21:05:04,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:05:04,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810195617] [2022-12-05 21:05:04,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:05:04,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:05:04,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:05:04,776 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:05:04,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:05:04,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810195617] [2022-12-05 21:05:04,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810195617] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:05:04,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077192442] [2022-12-05 21:05:04,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:05:04,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:05:04,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:05:04,780 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:05:04,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-05 21:05:04,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 21:05:04,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:05:04,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-05 21:05:04,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:05:05,496 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:05:05,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 180 treesize of output 112 [2022-12-05 21:05:05,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:05:05,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:05:07,147 INFO L321 Elim1Store]: treesize reduction 15, result has 65.1 percent of original size [2022-12-05 21:05:07,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 269 treesize of output 160 [2022-12-05 21:05:07,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:05:07,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077192442] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:05:07,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:05:07,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2022-12-05 21:05:07,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451793179] [2022-12-05 21:05:07,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:05:07,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-05 21:05:07,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:05:07,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-05 21:05:07,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-12-05 21:05:07,181 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:05:07,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 355 transitions, 6713 flow. Second operand has 26 states, 25 states have (on average 1.92) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:05:07,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:05:07,181 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:05:07,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:05:13,130 INFO L130 PetriNetUnfolder]: 2065/4110 cut-off events. [2022-12-05 21:05:13,130 INFO L131 PetriNetUnfolder]: For 77803/77803 co-relation queries the response was YES. [2022-12-05 21:05:13,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34220 conditions, 4110 events. 2065/4110 cut-off events. For 77803/77803 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 30514 event pairs, 194 based on Foata normal form. 22/4132 useless extension candidates. Maximal degree in co-relation 34126. Up to 1061 conditions per place. [2022-12-05 21:05:13,163 INFO L137 encePairwiseOnDemand]: 8/17 looper letters, 347 selfloop transitions, 314 changer transitions 41/702 dead transitions. [2022-12-05 21:05:13,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 702 transitions, 13721 flow [2022-12-05 21:05:13,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-05 21:05:13,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-12-05 21:05:13,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 206 transitions. [2022-12-05 21:05:13,165 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3275039745627981 [2022-12-05 21:05:13,165 INFO L175 Difference]: Start difference. First operand has 249 places, 355 transitions, 6713 flow. Second operand 37 states and 206 transitions. [2022-12-05 21:05:13,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 702 transitions, 13721 flow [2022-12-05 21:05:13,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 702 transitions, 13503 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-12-05 21:05:13,549 INFO L231 Difference]: Finished difference. Result has 285 places, 484 transitions, 10264 flow [2022-12-05 21:05:13,550 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=6579, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=10264, PETRI_PLACES=285, PETRI_TRANSITIONS=484} [2022-12-05 21:05:13,550 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 264 predicate places. [2022-12-05 21:05:13,550 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 484 transitions, 10264 flow [2022-12-05 21:05:13,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.92) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:05:13,550 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:05:13,550 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:05:13,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-12-05 21:05:13,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:05:13,751 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:05:13,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:05:13,752 INFO L85 PathProgramCache]: Analyzing trace with hash 40559592, now seen corresponding path program 34 times [2022-12-05 21:05:13,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:05:13,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660863325] [2022-12-05 21:05:13,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:05:13,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:05:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:05:14,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:05:14,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:05:14,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660863325] [2022-12-05 21:05:14,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660863325] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:05:14,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66657279] [2022-12-05 21:05:14,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:05:14,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:05:14,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:05:14,762 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:05:14,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-05 21:05:14,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:05:14,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:05:14,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-05 21:05:14,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:05:15,309 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:05:15,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 220 treesize of output 140 [2022-12-05 21:05:15,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:05:15,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:05:17,578 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:05:17,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 307 treesize of output 213 [2022-12-05 21:05:17,721 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:05:17,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66657279] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:05:17,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:05:17,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 27 [2022-12-05 21:05:17,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766261248] [2022-12-05 21:05:17,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:05:17,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-05 21:05:17,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:05:17,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-05 21:05:17,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2022-12-05 21:05:17,722 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:05:17,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 484 transitions, 10264 flow. Second operand has 28 states, 27 states have (on average 1.962962962962963) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:05:17,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:05:17,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:05:17,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:05:28,570 INFO L130 PetriNetUnfolder]: 2579/5254 cut-off events. [2022-12-05 21:05:28,570 INFO L131 PetriNetUnfolder]: For 112025/112025 co-relation queries the response was YES. [2022-12-05 21:05:28,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46228 conditions, 5254 events. 2579/5254 cut-off events. For 112025/112025 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 41903 event pairs, 472 based on Foata normal form. 52/5306 useless extension candidates. Maximal degree in co-relation 46123. Up to 1433 conditions per place. [2022-12-05 21:05:28,624 INFO L137 encePairwiseOnDemand]: 8/17 looper letters, 414 selfloop transitions, 346 changer transitions 45/805 dead transitions. [2022-12-05 21:05:28,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 805 transitions, 17031 flow [2022-12-05 21:05:28,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-05 21:05:28,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-12-05 21:05:28,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 227 transitions. [2022-12-05 21:05:28,626 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.36089030206677264 [2022-12-05 21:05:28,626 INFO L175 Difference]: Start difference. First operand has 285 places, 484 transitions, 10264 flow. Second operand 37 states and 227 transitions. [2022-12-05 21:05:28,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 805 transitions, 17031 flow [2022-12-05 21:05:29,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 805 transitions, 15036 flow, removed 658 selfloop flow, removed 22 redundant places. [2022-12-05 21:05:29,337 INFO L231 Difference]: Finished difference. Result has 315 places, 586 transitions, 11771 flow [2022-12-05 21:05:29,337 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=8878, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=11771, PETRI_PLACES=315, PETRI_TRANSITIONS=586} [2022-12-05 21:05:29,338 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 294 predicate places. [2022-12-05 21:05:29,338 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 586 transitions, 11771 flow [2022-12-05 21:05:29,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.962962962962963) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:05:29,338 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:05:29,338 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:05:29,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-12-05 21:05:29,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:05:29,543 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:05:29,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:05:29,544 INFO L85 PathProgramCache]: Analyzing trace with hash 167691238, now seen corresponding path program 35 times [2022-12-05 21:05:29,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:05:29,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885320987] [2022-12-05 21:05:29,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:05:29,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:05:29,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:05:30,192 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:05:30,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:05:30,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885320987] [2022-12-05 21:05:30,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885320987] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:05:30,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820139945] [2022-12-05 21:05:30,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:05:30,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:05:30,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:05:30,193 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:05:30,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-05 21:05:30,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-05 21:05:30,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:05:30,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-05 21:05:30,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:05:30,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 86 [2022-12-05 21:05:30,737 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-05 21:05:30,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:05:31,352 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:05:31,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 296 treesize of output 164 [2022-12-05 21:05:31,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:05:31,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820139945] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:05:31,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:05:31,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 27 [2022-12-05 21:05:31,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560209119] [2022-12-05 21:05:31,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:05:31,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-05 21:05:31,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:05:31,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-05 21:05:31,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2022-12-05 21:05:31,522 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:05:31,522 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 586 transitions, 11771 flow. Second operand has 28 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:05:31,522 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:05:31,522 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:05:31,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:05:38,436 INFO L130 PetriNetUnfolder]: 4057/8074 cut-off events. [2022-12-05 21:05:38,436 INFO L131 PetriNetUnfolder]: For 165451/165451 co-relation queries the response was YES. [2022-12-05 21:05:38,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68655 conditions, 8074 events. 4057/8074 cut-off events. For 165451/165451 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 67685 event pairs, 316 based on Foata normal form. 124/8198 useless extension candidates. Maximal degree in co-relation 68541. Up to 2414 conditions per place. [2022-12-05 21:05:38,571 INFO L137 encePairwiseOnDemand]: 8/17 looper letters, 577 selfloop transitions, 405 changer transitions 82/1064 dead transitions. [2022-12-05 21:05:38,571 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 1064 transitions, 22651 flow [2022-12-05 21:05:38,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-05 21:05:38,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-12-05 21:05:38,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 238 transitions. [2022-12-05 21:05:38,572 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.2916666666666667 [2022-12-05 21:05:38,572 INFO L175 Difference]: Start difference. First operand has 315 places, 586 transitions, 11771 flow. Second operand 48 states and 238 transitions. [2022-12-05 21:05:38,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 1064 transitions, 22651 flow [2022-12-05 21:05:39,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 1064 transitions, 22214 flow, removed 122 selfloop flow, removed 10 redundant places. [2022-12-05 21:05:39,711 INFO L231 Difference]: Finished difference. Result has 371 places, 762 transitions, 16506 flow [2022-12-05 21:05:39,712 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=11423, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=16506, PETRI_PLACES=371, PETRI_TRANSITIONS=762} [2022-12-05 21:05:39,712 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 350 predicate places. [2022-12-05 21:05:39,712 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 762 transitions, 16506 flow [2022-12-05 21:05:39,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:05:39,713 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:05:39,713 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:05:39,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-12-05 21:05:39,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:05:39,921 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:05:39,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:05:39,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1573007142, now seen corresponding path program 36 times [2022-12-05 21:05:39,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:05:39,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898119385] [2022-12-05 21:05:39,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:05:39,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:05:39,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:05:40,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:05:40,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:05:40,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898119385] [2022-12-05 21:05:40,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898119385] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:05:40,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359226952] [2022-12-05 21:05:40,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:05:40,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:05:40,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:05:40,614 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:05:40,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-05 21:05:40,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-05 21:05:40,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:05:40,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-05 21:05:40,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:05:41,150 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:05:41,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 153 treesize of output 97 [2022-12-05 21:05:41,292 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:05:41,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:05:43,540 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:05:43,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 281 treesize of output 191 [2022-12-05 21:05:43,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:05:43,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359226952] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:05:43,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:05:43,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2022-12-05 21:05:43,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530843616] [2022-12-05 21:05:43,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:05:43,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-05 21:05:43,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:05:43,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-05 21:05:43,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-12-05 21:05:43,681 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:05:43,682 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 762 transitions, 16506 flow. Second operand has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:05:43,682 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:05:43,682 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:05:43,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:05:53,933 INFO L130 PetriNetUnfolder]: 4185/8372 cut-off events. [2022-12-05 21:05:53,933 INFO L131 PetriNetUnfolder]: For 201224/201224 co-relation queries the response was YES. [2022-12-05 21:05:53,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76403 conditions, 8372 events. 4185/8372 cut-off events. For 201224/201224 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 71281 event pairs, 350 based on Foata normal form. 52/8424 useless extension candidates. Maximal degree in co-relation 76267. Up to 2385 conditions per place. [2022-12-05 21:05:54,033 INFO L137 encePairwiseOnDemand]: 8/17 looper letters, 438 selfloop transitions, 570 changer transitions 38/1046 dead transitions. [2022-12-05 21:05:54,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 1046 transitions, 23441 flow [2022-12-05 21:05:54,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-05 21:05:54,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-12-05 21:05:54,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 223 transitions. [2022-12-05 21:05:54,035 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.32794117647058824 [2022-12-05 21:05:54,035 INFO L175 Difference]: Start difference. First operand has 371 places, 762 transitions, 16506 flow. Second operand 40 states and 223 transitions. [2022-12-05 21:05:54,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 1046 transitions, 23441 flow [2022-12-05 21:05:55,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 1046 transitions, 21689 flow, removed 783 selfloop flow, removed 16 redundant places. [2022-12-05 21:05:55,950 INFO L231 Difference]: Finished difference. Result has 401 places, 861 transitions, 18866 flow [2022-12-05 21:05:55,951 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=15142, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=760, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=482, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=18866, PETRI_PLACES=401, PETRI_TRANSITIONS=861} [2022-12-05 21:05:55,952 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 380 predicate places. [2022-12-05 21:05:55,952 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 861 transitions, 18866 flow [2022-12-05 21:05:55,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:05:55,952 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:05:55,953 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:05:55,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-12-05 21:05:56,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:05:56,158 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:05:56,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:05:56,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1757094234, now seen corresponding path program 37 times [2022-12-05 21:05:56,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:05:56,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303336170] [2022-12-05 21:05:56,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:05:56,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:05:56,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:05:56,712 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:05:56,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:05:56,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303336170] [2022-12-05 21:05:56,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303336170] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:05:56,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461913565] [2022-12-05 21:05:56,712 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:05:56,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:05:56,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:05:56,716 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:05:56,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-05 21:05:56,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:05:56,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-05 21:05:56,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:05:57,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 112 [2022-12-05 21:05:57,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:05:57,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:05:58,402 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:05:58,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 390 treesize of output 236 [2022-12-05 21:05:58,599 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:05:58,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461913565] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:05:58,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:05:58,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2022-12-05 21:05:58,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374237652] [2022-12-05 21:05:58,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:05:58,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-05 21:05:58,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:05:58,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-05 21:05:58,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2022-12-05 21:05:58,600 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:05:58,601 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 861 transitions, 18866 flow. Second operand has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:05:58,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:05:58,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:05:58,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:06:05,721 INFO L130 PetriNetUnfolder]: 4263/8452 cut-off events. [2022-12-05 21:06:05,722 INFO L131 PetriNetUnfolder]: For 192429/192429 co-relation queries the response was YES. [2022-12-05 21:06:05,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76060 conditions, 8452 events. 4263/8452 cut-off events. For 192429/192429 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 71287 event pairs, 408 based on Foata normal form. 28/8480 useless extension candidates. Maximal degree in co-relation 75917. Up to 3148 conditions per place. [2022-12-05 21:06:05,945 INFO L137 encePairwiseOnDemand]: 9/17 looper letters, 617 selfloop transitions, 462 changer transitions 33/1112 dead transitions. [2022-12-05 21:06:05,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 1112 transitions, 25588 flow [2022-12-05 21:06:05,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-05 21:06:05,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-05 21:06:05,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 171 transitions. [2022-12-05 21:06:05,948 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3352941176470588 [2022-12-05 21:06:05,948 INFO L175 Difference]: Start difference. First operand has 401 places, 861 transitions, 18866 flow. Second operand 30 states and 171 transitions. [2022-12-05 21:06:05,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 1112 transitions, 25588 flow [2022-12-05 21:06:07,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 1112 transitions, 24466 flow, removed 258 selfloop flow, removed 14 redundant places. [2022-12-05 21:06:07,560 INFO L231 Difference]: Finished difference. Result has 423 places, 914 transitions, 20423 flow [2022-12-05 21:06:07,560 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=17911, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=859, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=395, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=20423, PETRI_PLACES=423, PETRI_TRANSITIONS=914} [2022-12-05 21:06:07,561 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 402 predicate places. [2022-12-05 21:06:07,561 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 914 transitions, 20423 flow [2022-12-05 21:06:07,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:06:07,561 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:06:07,561 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:06:07,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-12-05 21:06:07,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-12-05 21:06:07,766 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:06:07,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:06:07,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1486187646, now seen corresponding path program 38 times [2022-12-05 21:06:07,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:06:07,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371517983] [2022-12-05 21:06:07,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:06:07,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:06:07,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:06:08,172 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-05 21:06:08,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:06:08,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371517983] [2022-12-05 21:06:08,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371517983] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:06:08,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074387337] [2022-12-05 21:06:08,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:06:08,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:06:08,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:06:08,174 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:06:08,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-05 21:06:08,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:06:08,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:06:08,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-05 21:06:08,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:06:08,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 93 [2022-12-05 21:06:08,558 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-05 21:06:08,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:06:08,742 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:06:08,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 30 [2022-12-05 21:06:08,761 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-05 21:06:08,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074387337] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:06:08,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:06:08,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2022-12-05 21:06:08,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514606788] [2022-12-05 21:06:08,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:06:08,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-05 21:06:08,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:06:08,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-05 21:06:08,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-12-05 21:06:08,762 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:06:08,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 914 transitions, 20423 flow. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:06:08,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:06:08,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:06:08,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:06:13,118 INFO L130 PetriNetUnfolder]: 5373/10706 cut-off events. [2022-12-05 21:06:13,119 INFO L131 PetriNetUnfolder]: For 263291/263291 co-relation queries the response was YES. [2022-12-05 21:06:13,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98304 conditions, 10706 events. 5373/10706 cut-off events. For 263291/263291 co-relation queries the response was YES. Maximal size of possible extension queue 837. Compared 94445 event pairs, 1422 based on Foata normal form. 40/10746 useless extension candidates. Maximal degree in co-relation 98168. Up to 4730 conditions per place. [2022-12-05 21:06:13,252 INFO L137 encePairwiseOnDemand]: 10/17 looper letters, 969 selfloop transitions, 206 changer transitions 14/1189 dead transitions. [2022-12-05 21:06:13,252 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 1189 transitions, 28697 flow [2022-12-05 21:06:13,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-05 21:06:13,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-05 21:06:13,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 79 transitions. [2022-12-05 21:06:13,253 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.30980392156862746 [2022-12-05 21:06:13,253 INFO L175 Difference]: Start difference. First operand has 423 places, 914 transitions, 20423 flow. Second operand 15 states and 79 transitions. [2022-12-05 21:06:13,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 1189 transitions, 28697 flow [2022-12-05 21:06:15,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 1189 transitions, 27804 flow, removed 287 selfloop flow, removed 15 redundant places. [2022-12-05 21:06:15,689 INFO L231 Difference]: Finished difference. Result has 421 places, 979 transitions, 22208 flow [2022-12-05 21:06:15,690 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=19543, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=906, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=700, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=22208, PETRI_PLACES=421, PETRI_TRANSITIONS=979} [2022-12-05 21:06:15,690 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 400 predicate places. [2022-12-05 21:06:15,690 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 979 transitions, 22208 flow [2022-12-05 21:06:15,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:06:15,690 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:06:15,691 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:06:15,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-12-05 21:06:15,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-12-05 21:06:15,891 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:06:15,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:06:15,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1405802850, now seen corresponding path program 39 times [2022-12-05 21:06:15,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:06:15,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800025904] [2022-12-05 21:06:15,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:06:15,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:06:15,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:06:16,984 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:06:16,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:06:16,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800025904] [2022-12-05 21:06:16,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800025904] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:06:16,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621743950] [2022-12-05 21:06:16,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:06:16,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:06:16,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:06:16,987 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:06:16,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-05 21:06:17,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-05 21:06:17,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:06:17,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-05 21:06:17,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:06:18,006 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:06:18,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 181 treesize of output 117 [2022-12-05 21:06:18,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:06:18,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:06:20,054 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:06:20,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 292 treesize of output 204 [2022-12-05 21:06:20,467 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:06:20,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621743950] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:06:20,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:06:20,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 30 [2022-12-05 21:06:20,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532525715] [2022-12-05 21:06:20,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:06:20,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-05 21:06:20,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:06:20,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-05 21:06:20,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2022-12-05 21:06:20,468 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:06:20,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 979 transitions, 22208 flow. Second operand has 31 states, 30 states have (on average 1.8) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:06:20,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:06:20,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:06:20,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:06:31,151 INFO L130 PetriNetUnfolder]: 5857/11662 cut-off events. [2022-12-05 21:06:31,151 INFO L131 PetriNetUnfolder]: For 292048/292048 co-relation queries the response was YES. [2022-12-05 21:06:31,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105951 conditions, 11662 events. 5857/11662 cut-off events. For 292048/292048 co-relation queries the response was YES. Maximal size of possible extension queue 922. Compared 104470 event pairs, 1592 based on Foata normal form. 24/11686 useless extension candidates. Maximal degree in co-relation 105801. Up to 7147 conditions per place. [2022-12-05 21:06:31,295 INFO L137 encePairwiseOnDemand]: 8/17 looper letters, 779 selfloop transitions, 367 changer transitions 52/1198 dead transitions. [2022-12-05 21:06:31,296 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 1198 transitions, 28493 flow [2022-12-05 21:06:31,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-05 21:06:31,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-05 21:06:31,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 155 transitions. [2022-12-05 21:06:31,297 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.2605042016806723 [2022-12-05 21:06:31,297 INFO L175 Difference]: Start difference. First operand has 421 places, 979 transitions, 22208 flow. Second operand 35 states and 155 transitions. [2022-12-05 21:06:31,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 1198 transitions, 28493 flow [2022-12-05 21:06:33,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 1198 transitions, 28283 flow, removed 18 selfloop flow, removed 9 redundant places. [2022-12-05 21:06:34,010 INFO L231 Difference]: Finished difference. Result has 455 places, 1064 transitions, 24933 flow [2022-12-05 21:06:34,010 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=22002, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=979, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=666, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=24933, PETRI_PLACES=455, PETRI_TRANSITIONS=1064} [2022-12-05 21:06:34,011 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 434 predicate places. [2022-12-05 21:06:34,011 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 1064 transitions, 24933 flow [2022-12-05 21:06:34,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.8) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:06:34,011 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:06:34,011 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:06:34,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-12-05 21:06:34,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-12-05 21:06:34,212 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:06:34,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:06:34,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1600639492, now seen corresponding path program 40 times [2022-12-05 21:06:34,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:06:34,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972840032] [2022-12-05 21:06:34,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:06:34,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:06:34,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:06:34,914 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:06:34,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:06:34,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972840032] [2022-12-05 21:06:34,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972840032] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:06:34,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550905047] [2022-12-05 21:06:34,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:06:34,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:06:34,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:06:34,916 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:06:34,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-05 21:06:35,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:06:35,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:06:35,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-05 21:06:35,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:06:35,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 86 [2022-12-05 21:06:35,543 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:06:35,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:06:36,615 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:06:36,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 303 treesize of output 199 [2022-12-05 21:06:36,813 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:06:36,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550905047] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:06:36,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:06:36,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2022-12-05 21:06:36,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743321645] [2022-12-05 21:06:36,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:06:36,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-05 21:06:36,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:06:36,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-05 21:06:36,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-12-05 21:06:36,815 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:06:36,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 1064 transitions, 24933 flow. Second operand has 27 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:06:36,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:06:36,815 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:06:36,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:06:45,235 INFO L130 PetriNetUnfolder]: 6009/11816 cut-off events. [2022-12-05 21:06:45,235 INFO L131 PetriNetUnfolder]: For 334197/334197 co-relation queries the response was YES. [2022-12-05 21:06:45,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114191 conditions, 11816 events. 6009/11816 cut-off events. For 334197/334197 co-relation queries the response was YES. Maximal size of possible extension queue 919. Compared 104701 event pairs, 664 based on Foata normal form. 38/11854 useless extension candidates. Maximal degree in co-relation 114027. Up to 4094 conditions per place. [2022-12-05 21:06:45,393 INFO L137 encePairwiseOnDemand]: 9/17 looper letters, 756 selfloop transitions, 537 changer transitions 26/1319 dead transitions. [2022-12-05 21:06:45,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 1319 transitions, 32668 flow [2022-12-05 21:06:45,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-05 21:06:45,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-05 21:06:45,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 178 transitions. [2022-12-05 21:06:45,395 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3272058823529412 [2022-12-05 21:06:45,395 INFO L175 Difference]: Start difference. First operand has 455 places, 1064 transitions, 24933 flow. Second operand 32 states and 178 transitions. [2022-12-05 21:06:45,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 1319 transitions, 32668 flow [2022-12-05 21:06:49,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 1319 transitions, 31706 flow, removed 360 selfloop flow, removed 21 redundant places. [2022-12-05 21:06:49,294 INFO L231 Difference]: Finished difference. Result has 467 places, 1112 transitions, 26944 flow [2022-12-05 21:06:49,294 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=24039, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1058, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=480, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=26944, PETRI_PLACES=467, PETRI_TRANSITIONS=1112} [2022-12-05 21:06:49,294 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 446 predicate places. [2022-12-05 21:06:49,294 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 1112 transitions, 26944 flow [2022-12-05 21:06:49,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:06:49,295 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:06:49,295 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:06:49,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-12-05 21:06:49,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-12-05 21:06:49,495 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:06:49,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:06:49,496 INFO L85 PathProgramCache]: Analyzing trace with hash 532062170, now seen corresponding path program 41 times [2022-12-05 21:06:49,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:06:49,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058516753] [2022-12-05 21:06:49,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:06:49,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:06:49,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:06:50,184 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:06:50,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:06:50,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058516753] [2022-12-05 21:06:50,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058516753] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:06:50,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849598188] [2022-12-05 21:06:50,184 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:06:50,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:06:50,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:06:50,186 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:06:50,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-12-05 21:06:50,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-05 21:06:50,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:06:50,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-05 21:06:50,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:06:50,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 113 [2022-12-05 21:06:50,718 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:06:50,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:06:51,698 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:06:51,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 266 treesize of output 174 [2022-12-05 21:06:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:06:51,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849598188] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:06:51,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:06:51,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2022-12-05 21:06:51,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486281857] [2022-12-05 21:06:51,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:06:51,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-05 21:06:51,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:06:51,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-05 21:06:51,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-12-05 21:06:51,908 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:06:51,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 1112 transitions, 26944 flow. Second operand has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:06:51,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:06:51,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:06:51,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:01,080 INFO L130 PetriNetUnfolder]: 6607/13614 cut-off events. [2022-12-05 21:07:01,081 INFO L131 PetriNetUnfolder]: For 407645/407645 co-relation queries the response was YES. [2022-12-05 21:07:01,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133008 conditions, 13614 events. 6607/13614 cut-off events. For 407645/407645 co-relation queries the response was YES. Maximal size of possible extension queue 1076. Compared 129016 event pairs, 676 based on Foata normal form. 30/13644 useless extension candidates. Maximal degree in co-relation 132843. Up to 4816 conditions per place. [2022-12-05 21:07:01,273 INFO L137 encePairwiseOnDemand]: 9/17 looper letters, 866 selfloop transitions, 609 changer transitions 25/1500 dead transitions. [2022-12-05 21:07:01,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 1500 transitions, 38213 flow [2022-12-05 21:07:01,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-05 21:07:01,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-05 21:07:01,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 194 transitions. [2022-12-05 21:07:01,275 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3356401384083045 [2022-12-05 21:07:01,275 INFO L175 Difference]: Start difference. First operand has 467 places, 1112 transitions, 26944 flow. Second operand 34 states and 194 transitions. [2022-12-05 21:07:01,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 1500 transitions, 38213 flow [2022-12-05 21:07:06,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 1500 transitions, 37191 flow, removed 399 selfloop flow, removed 13 redundant places. [2022-12-05 21:07:06,309 INFO L231 Difference]: Finished difference. Result has 489 places, 1246 transitions, 31173 flow [2022-12-05 21:07:06,309 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=26046, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=486, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=31173, PETRI_PLACES=489, PETRI_TRANSITIONS=1246} [2022-12-05 21:07:06,310 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 468 predicate places. [2022-12-05 21:07:06,310 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 1246 transitions, 31173 flow [2022-12-05 21:07:06,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:06,310 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:06,310 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:06,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-12-05 21:07:06,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:06,510 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:06,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:06,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1769382810, now seen corresponding path program 42 times [2022-12-05 21:07:06,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:06,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861612325] [2022-12-05 21:07:06,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:06,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:06,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:07,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:07:07,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:07,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861612325] [2022-12-05 21:07:07,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861612325] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:07,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926066377] [2022-12-05 21:07:07,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:07:07,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:07,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:07,108 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:07:07,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-05 21:07:07,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-05 21:07:07,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:07:07,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-05 21:07:07,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:07:07,819 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:07:07,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 115 treesize of output 71 [2022-12-05 21:07:07,872 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:07:07,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:07:08,961 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:07:08,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 150 [2022-12-05 21:07:09,182 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:07:09,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926066377] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:07:09,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:07:09,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2022-12-05 21:07:09,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457353007] [2022-12-05 21:07:09,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:07:09,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-05 21:07:09,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:09,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-05 21:07:09,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-12-05 21:07:09,184 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:07:09,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 1246 transitions, 31173 flow. Second operand has 26 states, 25 states have (on average 1.8) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:09,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:09,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:07:09,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:19,712 INFO L130 PetriNetUnfolder]: 6635/13698 cut-off events. [2022-12-05 21:07:19,712 INFO L131 PetriNetUnfolder]: For 425874/425874 co-relation queries the response was YES. [2022-12-05 21:07:19,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136771 conditions, 13698 events. 6635/13698 cut-off events. For 425874/425874 co-relation queries the response was YES. Maximal size of possible extension queue 1093. Compared 130335 event pairs, 1940 based on Foata normal form. 10/13708 useless extension candidates. Maximal degree in co-relation 136601. Up to 9460 conditions per place. [2022-12-05 21:07:19,908 INFO L137 encePairwiseOnDemand]: 8/17 looper letters, 963 selfloop transitions, 380 changer transitions 17/1360 dead transitions. [2022-12-05 21:07:19,908 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 1360 transitions, 35476 flow [2022-12-05 21:07:19,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-05 21:07:19,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-12-05 21:07:19,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 165 transitions. [2022-12-05 21:07:19,909 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.25541795665634676 [2022-12-05 21:07:19,910 INFO L175 Difference]: Start difference. First operand has 489 places, 1246 transitions, 31173 flow. Second operand 38 states and 165 transitions. [2022-12-05 21:07:19,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 1360 transitions, 35476 flow [2022-12-05 21:07:25,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 1360 transitions, 34507 flow, removed 347 selfloop flow, removed 14 redundant places. [2022-12-05 21:07:25,664 INFO L231 Difference]: Finished difference. Result has 520 places, 1284 transitions, 32091 flow [2022-12-05 21:07:25,665 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=30286, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=346, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=882, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=32091, PETRI_PLACES=520, PETRI_TRANSITIONS=1284} [2022-12-05 21:07:25,665 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 499 predicate places. [2022-12-05 21:07:25,666 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 1284 transitions, 32091 flow [2022-12-05 21:07:25,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.8) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:25,666 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:25,666 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:25,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-12-05 21:07:25,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-12-05 21:07:25,870 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:25,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:25,870 INFO L85 PathProgramCache]: Analyzing trace with hash 345304778, now seen corresponding path program 43 times [2022-12-05 21:07:25,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:25,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985209909] [2022-12-05 21:07:25,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:25,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:26,577 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:07:26,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:26,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985209909] [2022-12-05 21:07:26,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985209909] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:26,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002811278] [2022-12-05 21:07:26,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:07:26,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:26,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:26,579 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:07:26,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-05 21:07:26,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:26,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-05 21:07:26,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:07:27,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 86 [2022-12-05 21:07:27,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:07:27,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:07:28,057 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:07:28,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 293 treesize of output 193 [2022-12-05 21:07:28,286 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:07:28,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002811278] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:07:28,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:07:28,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2022-12-05 21:07:28,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909043669] [2022-12-05 21:07:28,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:07:28,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-05 21:07:28,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:28,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-05 21:07:28,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2022-12-05 21:07:28,288 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:07:28,288 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 1284 transitions, 32091 flow. Second operand has 27 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:28,288 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:28,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:07:28,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:39,171 INFO L130 PetriNetUnfolder]: 7881/16616 cut-off events. [2022-12-05 21:07:39,171 INFO L131 PetriNetUnfolder]: For 531812/531812 co-relation queries the response was YES. [2022-12-05 21:07:39,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167035 conditions, 16616 events. 7881/16616 cut-off events. For 531812/531812 co-relation queries the response was YES. Maximal size of possible extension queue 1318. Compared 165691 event pairs, 2216 based on Foata normal form. 46/16662 useless extension candidates. Maximal degree in co-relation 166859. Up to 10072 conditions per place. [2022-12-05 21:07:39,401 INFO L137 encePairwiseOnDemand]: 9/17 looper letters, 1183 selfloop transitions, 530 changer transitions 39/1752 dead transitions. [2022-12-05 21:07:39,401 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 1752 transitions, 47226 flow [2022-12-05 21:07:39,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-05 21:07:39,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-05 21:07:39,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 186 transitions. [2022-12-05 21:07:39,402 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3126050420168067 [2022-12-05 21:07:39,402 INFO L175 Difference]: Start difference. First operand has 520 places, 1284 transitions, 32091 flow. Second operand 35 states and 186 transitions. [2022-12-05 21:07:39,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 1752 transitions, 47226 flow [2022-12-05 21:07:46,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 1752 transitions, 46797 flow, removed 83 selfloop flow, removed 19 redundant places. [2022-12-05 21:07:46,412 INFO L231 Difference]: Finished difference. Result has 553 places, 1561 transitions, 41829 flow [2022-12-05 21:07:46,412 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=31685, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=932, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=41829, PETRI_PLACES=553, PETRI_TRANSITIONS=1561} [2022-12-05 21:07:46,413 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 532 predicate places. [2022-12-05 21:07:46,413 INFO L495 AbstractCegarLoop]: Abstraction has has 553 places, 1561 transitions, 41829 flow [2022-12-05 21:07:46,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:46,413 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:46,413 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:46,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-12-05 21:07:46,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:46,614 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:46,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:46,615 INFO L85 PathProgramCache]: Analyzing trace with hash -759130038, now seen corresponding path program 44 times [2022-12-05 21:07:46,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:46,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982085093] [2022-12-05 21:07:46,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:46,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:46,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:47,475 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:07:47,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:47,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982085093] [2022-12-05 21:07:47,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982085093] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:47,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027623785] [2022-12-05 21:07:47,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:07:47,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:47,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:47,512 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:07:47,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-05 21:07:47,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:07:47,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:07:47,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-05 21:07:47,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:07:48,633 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:07:48,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 172 treesize of output 112 [2022-12-05 21:07:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:07:48,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:07:50,083 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:07:50,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 321 treesize of output 217 [2022-12-05 21:07:50,542 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:07:50,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027623785] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:07:50,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:07:50,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2022-12-05 21:07:50,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68401555] [2022-12-05 21:07:50,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:07:50,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-05 21:07:50,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:50,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-05 21:07:50,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2022-12-05 21:07:50,543 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:07:50,543 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 553 places, 1561 transitions, 41829 flow. Second operand has 27 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 27 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:50,543 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:50,543 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:07:50,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:05,613 INFO L130 PetriNetUnfolder]: 8509/18066 cut-off events. [2022-12-05 21:08:05,613 INFO L131 PetriNetUnfolder]: For 657851/657851 co-relation queries the response was YES. [2022-12-05 21:08:05,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195165 conditions, 18066 events. 8509/18066 cut-off events. For 657851/657851 co-relation queries the response was YES. Maximal size of possible extension queue 1397. Compared 183437 event pairs, 1362 based on Foata normal form. 16/18082 useless extension candidates. Maximal degree in co-relation 194971. Up to 5698 conditions per place. [2022-12-05 21:08:05,919 INFO L137 encePairwiseOnDemand]: 8/17 looper letters, 901 selfloop transitions, 879 changer transitions 19/1799 dead transitions. [2022-12-05 21:08:05,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 1799 transitions, 51553 flow [2022-12-05 21:08:05,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-05 21:08:05,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-05 21:08:05,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 154 transitions. [2022-12-05 21:08:05,920 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.28308823529411764 [2022-12-05 21:08:05,920 INFO L175 Difference]: Start difference. First operand has 553 places, 1561 transitions, 41829 flow. Second operand 32 states and 154 transitions. [2022-12-05 21:08:05,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 1799 transitions, 51553 flow [2022-12-05 21:08:18,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 1799 transitions, 49311 flow, removed 1094 selfloop flow, removed 10 redundant places. [2022-12-05 21:08:18,242 INFO L231 Difference]: Finished difference. Result has 580 places, 1669 transitions, 45133 flow [2022-12-05 21:08:18,243 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=39851, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=782, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=743, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=45133, PETRI_PLACES=580, PETRI_TRANSITIONS=1669} [2022-12-05 21:08:18,244 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 559 predicate places. [2022-12-05 21:08:18,244 INFO L495 AbstractCegarLoop]: Abstraction has has 580 places, 1669 transitions, 45133 flow [2022-12-05 21:08:18,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 27 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:18,244 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:18,244 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:18,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-12-05 21:08:18,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-12-05 21:08:18,450 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:18,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:18,450 INFO L85 PathProgramCache]: Analyzing trace with hash 424103142, now seen corresponding path program 45 times [2022-12-05 21:08:18,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:18,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850697733] [2022-12-05 21:08:18,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:18,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:18,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:08:19,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:19,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850697733] [2022-12-05 21:08:19,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850697733] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:19,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590664493] [2022-12-05 21:08:19,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:08:19,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:19,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:19,274 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:19,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-12-05 21:08:19,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 21:08:19,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:19,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-05 21:08:19,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:19,983 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:08:19,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 171 treesize of output 111 [2022-12-05 21:08:20,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:08:20,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:22,061 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:08:22,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 430 treesize of output 252 [2022-12-05 21:08:22,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:08:22,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590664493] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:22,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:22,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 28 [2022-12-05 21:08:22,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111398125] [2022-12-05 21:08:22,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:22,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-05 21:08:22,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:22,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-05 21:08:22,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-12-05 21:08:22,511 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:08:22,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 1669 transitions, 45133 flow. Second operand has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:22,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:22,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:08:22,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:39,200 INFO L130 PetriNetUnfolder]: 8659/18326 cut-off events. [2022-12-05 21:08:39,200 INFO L131 PetriNetUnfolder]: For 671322/671322 co-relation queries the response was YES. [2022-12-05 21:08:39,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197915 conditions, 18326 events. 8659/18326 cut-off events. For 671322/671322 co-relation queries the response was YES. Maximal size of possible extension queue 1418. Compared 186024 event pairs, 2440 based on Foata normal form. 6/18332 useless extension candidates. Maximal degree in co-relation 197713. Up to 10936 conditions per place. [2022-12-05 21:08:39,522 INFO L137 encePairwiseOnDemand]: 9/17 looper letters, 1291 selfloop transitions, 513 changer transitions 12/1816 dead transitions. [2022-12-05 21:08:39,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 605 places, 1816 transitions, 51838 flow [2022-12-05 21:08:39,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-05 21:08:39,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-05 21:08:39,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 134 transitions. [2022-12-05 21:08:39,523 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.29193899782135074 [2022-12-05 21:08:39,523 INFO L175 Difference]: Start difference. First operand has 580 places, 1669 transitions, 45133 flow. Second operand 27 states and 134 transitions. [2022-12-05 21:08:39,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 605 places, 1816 transitions, 51838 flow [2022-12-05 21:08:53,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 595 places, 1816 transitions, 50971 flow, removed 409 selfloop flow, removed 10 redundant places. [2022-12-05 21:08:53,367 INFO L231 Difference]: Finished difference. Result has 603 places, 1716 transitions, 46975 flow [2022-12-05 21:08:53,369 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=44326, PETRI_DIFFERENCE_MINUEND_PLACES=569, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=471, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=46975, PETRI_PLACES=603, PETRI_TRANSITIONS=1716} [2022-12-05 21:08:53,369 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 582 predicate places. [2022-12-05 21:08:53,369 INFO L495 AbstractCegarLoop]: Abstraction has has 603 places, 1716 transitions, 46975 flow [2022-12-05 21:08:53,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:53,370 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:53,370 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:53,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-12-05 21:08:53,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:53,575 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:53,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:53,576 INFO L85 PathProgramCache]: Analyzing trace with hash 2056128994, now seen corresponding path program 46 times [2022-12-05 21:08:53,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:53,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617290786] [2022-12-05 21:08:53,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:53,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:53,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:54,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:54,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:54,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617290786] [2022-12-05 21:08:54,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617290786] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:54,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202222441] [2022-12-05 21:08:54,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:08:54,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:54,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:54,435 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:54,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-12-05 21:08:54,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:08:54,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:54,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-05 21:08:54,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:54,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 99 [2022-12-05 21:08:55,064 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:08:55,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:56,126 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:08:56,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 360 treesize of output 222 [2022-12-05 21:08:56,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:08:56,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202222441] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:56,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:56,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2022-12-05 21:08:56,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296912096] [2022-12-05 21:08:56,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:56,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-05 21:08:56,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:56,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-05 21:08:56,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2022-12-05 21:08:56,360 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:08:56,360 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 603 places, 1716 transitions, 46975 flow. Second operand has 32 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 32 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:56,360 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:56,360 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:08:56,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:09:12,246 INFO L130 PetriNetUnfolder]: 9333/19502 cut-off events. [2022-12-05 21:09:12,246 INFO L131 PetriNetUnfolder]: For 776554/776554 co-relation queries the response was YES. [2022-12-05 21:09:12,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215540 conditions, 19502 events. 9333/19502 cut-off events. For 776554/776554 co-relation queries the response was YES. Maximal size of possible extension queue 1500. Compared 197681 event pairs, 2328 based on Foata normal form. 18/19520 useless extension candidates. Maximal degree in co-relation 215331. Up to 10061 conditions per place. [2022-12-05 21:09:12,691 INFO L137 encePairwiseOnDemand]: 8/17 looper letters, 1300 selfloop transitions, 674 changer transitions 23/1997 dead transitions. [2022-12-05 21:09:12,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 634 places, 1997 transitions, 58534 flow [2022-12-05 21:09:12,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-05 21:09:12,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-05 21:09:12,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 162 transitions. [2022-12-05 21:09:12,692 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.2977941176470588 [2022-12-05 21:09:12,692 INFO L175 Difference]: Start difference. First operand has 603 places, 1716 transitions, 46975 flow. Second operand 32 states and 162 transitions. [2022-12-05 21:09:12,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 634 places, 1997 transitions, 58534 flow [2022-12-05 21:09:27,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 624 places, 1997 transitions, 58130 flow, removed 154 selfloop flow, removed 10 redundant places. [2022-12-05 21:09:27,751 INFO L231 Difference]: Finished difference. Result has 633 places, 1856 transitions, 53112 flow [2022-12-05 21:09:27,752 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=46579, PETRI_DIFFERENCE_MINUEND_PLACES=593, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=557, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=53112, PETRI_PLACES=633, PETRI_TRANSITIONS=1856} [2022-12-05 21:09:27,752 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 612 predicate places. [2022-12-05 21:09:27,753 INFO L495 AbstractCegarLoop]: Abstraction has has 633 places, 1856 transitions, 53112 flow [2022-12-05 21:09:27,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 32 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:09:27,753 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:09:27,753 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:09:27,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-12-05 21:09:27,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:09:27,958 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:09:27,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:09:27,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1410168698, now seen corresponding path program 47 times [2022-12-05 21:09:27,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:09:27,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563905627] [2022-12-05 21:09:27,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:09:27,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:09:27,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:09:28,851 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:28,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:09:28,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563905627] [2022-12-05 21:09:28,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563905627] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:09:28,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009589215] [2022-12-05 21:09:28,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:09:28,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:09:28,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:09:28,853 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:09:28,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-12-05 21:09:28,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-05 21:09:28,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:09:28,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-05 21:09:29,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:09:29,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 253 treesize of output 139 [2022-12-05 21:09:29,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:09:29,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:09:30,305 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:09:30,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 235 treesize of output 159 [2022-12-05 21:09:30,558 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:09:30,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009589215] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:09:30,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:09:30,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 30 [2022-12-05 21:09:30,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025481094] [2022-12-05 21:09:30,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:09:30,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-05 21:09:30,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:09:30,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-05 21:09:30,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2022-12-05 21:09:30,560 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:09:30,560 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 633 places, 1856 transitions, 53112 flow. Second operand has 31 states, 30 states have (on average 1.7) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:09:30,560 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:09:30,560 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:09:30,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:09:49,731 INFO L130 PetriNetUnfolder]: 10113/21218 cut-off events. [2022-12-05 21:09:49,732 INFO L131 PetriNetUnfolder]: For 950719/950719 co-relation queries the response was YES. [2022-12-05 21:09:50,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243318 conditions, 21218 events. 10113/21218 cut-off events. For 950719/950719 co-relation queries the response was YES. Maximal size of possible extension queue 1530. Compared 217207 event pairs, 2340 based on Foata normal form. 46/21264 useless extension candidates. Maximal degree in co-relation 243097. Up to 9937 conditions per place. [2022-12-05 21:09:50,103 INFO L137 encePairwiseOnDemand]: 8/17 looper letters, 1652 selfloop transitions, 481 changer transitions 37/2170 dead transitions. [2022-12-05 21:09:50,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 665 places, 2170 transitions, 65770 flow [2022-12-05 21:09:50,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-05 21:09:50,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-12-05 21:09:50,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 182 transitions. [2022-12-05 21:09:50,105 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.2973856209150327 [2022-12-05 21:09:50,105 INFO L175 Difference]: Start difference. First operand has 633 places, 1856 transitions, 53112 flow. Second operand 36 states and 182 transitions. [2022-12-05 21:09:50,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 665 places, 2170 transitions, 65770 flow [2022-12-05 21:10:10,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 653 places, 2170 transitions, 64026 flow, removed 815 selfloop flow, removed 12 redundant places. [2022-12-05 21:10:10,534 INFO L231 Difference]: Finished difference. Result has 669 places, 1971 transitions, 57489 flow [2022-12-05 21:10:10,535 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=51331, PETRI_DIFFERENCE_MINUEND_PLACES=618, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1853, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=368, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=57489, PETRI_PLACES=669, PETRI_TRANSITIONS=1971} [2022-12-05 21:10:10,536 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 648 predicate places. [2022-12-05 21:10:10,536 INFO L495 AbstractCegarLoop]: Abstraction has has 669 places, 1971 transitions, 57489 flow [2022-12-05 21:10:10,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.7) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:10:10,536 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:10:10,536 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:10:10,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-12-05 21:10:10,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:10:10,736 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:10:10,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:10:10,737 INFO L85 PathProgramCache]: Analyzing trace with hash 230391034, now seen corresponding path program 48 times [2022-12-05 21:10:10,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:10:10,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866903793] [2022-12-05 21:10:10,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:10:10,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:10:10,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:10:11,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:10:11,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:10:11,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866903793] [2022-12-05 21:10:11,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866903793] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:10:11,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582986544] [2022-12-05 21:10:11,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:10:11,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:10:11,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:10:11,497 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:10:11,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-12-05 21:10:11,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-05 21:10:11,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:10:11,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-05 21:10:11,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:10:12,130 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:10:12,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 177 treesize of output 113 [2022-12-05 21:10:12,295 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:10:12,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:10:14,399 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:10:14,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 463 treesize of output 276 [2022-12-05 21:10:14,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:10:14,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582986544] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:10:14,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:10:14,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 28 [2022-12-05 21:10:14,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900762062] [2022-12-05 21:10:14,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:10:14,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-05 21:10:14,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:10:14,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-05 21:10:14,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2022-12-05 21:10:14,619 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:10:14,619 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 669 places, 1971 transitions, 57489 flow. Second operand has 29 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:10:14,619 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:10:14,619 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:10:14,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:10:39,085 INFO L130 PetriNetUnfolder]: 10151/21266 cut-off events. [2022-12-05 21:10:39,085 INFO L131 PetriNetUnfolder]: For 1043085/1043085 co-relation queries the response was YES. [2022-12-05 21:10:39,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249413 conditions, 21266 events. 10151/21266 cut-off events. For 1043085/1043085 co-relation queries the response was YES. Maximal size of possible extension queue 1542. Compared 217452 event pairs, 2844 based on Foata normal form. 28/21294 useless extension candidates. Maximal degree in co-relation 249177. Up to 12536 conditions per place. [2022-12-05 21:10:39,624 INFO L137 encePairwiseOnDemand]: 9/17 looper letters, 1468 selfloop transitions, 644 changer transitions 30/2142 dead transitions. [2022-12-05 21:10:39,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 702 places, 2142 transitions, 65361 flow [2022-12-05 21:10:39,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-05 21:10:39,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-12-05 21:10:39,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 183 transitions. [2022-12-05 21:10:39,626 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.27601809954751133 [2022-12-05 21:10:39,626 INFO L175 Difference]: Start difference. First operand has 669 places, 1971 transitions, 57489 flow. Second operand 39 states and 183 transitions. [2022-12-05 21:10:39,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 702 places, 2142 transitions, 65361 flow [2022-12-05 21:11:01,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 683 places, 2142 transitions, 64301 flow, removed 351 selfloop flow, removed 19 redundant places. [2022-12-05 21:11:01,151 INFO L231 Difference]: Finished difference. Result has 693 places, 2008 transitions, 59274 flow [2022-12-05 21:11:01,152 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=56401, PETRI_DIFFERENCE_MINUEND_PLACES=645, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1968, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=599, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=59274, PETRI_PLACES=693, PETRI_TRANSITIONS=2008} [2022-12-05 21:11:01,153 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 672 predicate places. [2022-12-05 21:11:01,153 INFO L495 AbstractCegarLoop]: Abstraction has has 693 places, 2008 transitions, 59274 flow [2022-12-05 21:11:01,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:11:01,153 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:11:01,153 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:11:01,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-12-05 21:11:01,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-12-05 21:11:01,359 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:11:01,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:11:01,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1915779726, now seen corresponding path program 49 times [2022-12-05 21:11:01,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:11:01,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134660617] [2022-12-05 21:11:01,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:11:01,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:11:01,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:11:02,459 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:11:02,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:11:02,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134660617] [2022-12-05 21:11:02,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134660617] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:11:02,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921685662] [2022-12-05 21:11:02,460 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:11:02,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:11:02,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:11:02,461 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:11:02,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-12-05 21:11:02,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:11:02,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-05 21:11:02,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:11:02,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 253 treesize of output 139 [2022-12-05 21:11:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:11:03,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:11:04,294 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:11:04,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 198 [2022-12-05 21:11:04,509 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:11:04,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921685662] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:11:04,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:11:04,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2022-12-05 21:11:04,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131923524] [2022-12-05 21:11:04,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:11:04,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-05 21:11:04,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:11:04,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-05 21:11:04,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-12-05 21:11:04,510 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:11:04,510 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 693 places, 2008 transitions, 59274 flow. Second operand has 32 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 32 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:11:04,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:11:04,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:11:04,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:11:30,949 INFO L130 PetriNetUnfolder]: 11485/24434 cut-off events. [2022-12-05 21:11:30,949 INFO L131 PetriNetUnfolder]: For 1319119/1319119 co-relation queries the response was YES. [2022-12-05 21:11:31,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295250 conditions, 24434 events. 11485/24434 cut-off events. For 1319119/1319119 co-relation queries the response was YES. Maximal size of possible extension queue 1763. Compared 257149 event pairs, 3070 based on Foata normal form. 168/24602 useless extension candidates. Maximal degree in co-relation 295013. Up to 14025 conditions per place. [2022-12-05 21:11:31,586 INFO L137 encePairwiseOnDemand]: 8/17 looper letters, 1600 selfloop transitions, 851 changer transitions 116/2567 dead transitions. [2022-12-05 21:11:31,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 746 places, 2567 transitions, 82475 flow [2022-12-05 21:11:31,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-12-05 21:11:31,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-12-05 21:11:31,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 302 transitions. [2022-12-05 21:11:31,591 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.296078431372549 [2022-12-05 21:11:31,591 INFO L175 Difference]: Start difference. First operand has 693 places, 2008 transitions, 59274 flow. Second operand 60 states and 302 transitions. [2022-12-05 21:11:31,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 746 places, 2567 transitions, 82475 flow [2022-12-05 21:12:00,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 723 places, 2567 transitions, 80876 flow, removed 316 selfloop flow, removed 23 redundant places. [2022-12-05 21:12:00,058 INFO L231 Difference]: Finished difference. Result has 752 places, 2280 transitions, 72249 flow [2022-12-05 21:12:00,059 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=57733, PETRI_DIFFERENCE_MINUEND_PLACES=664, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1994, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=575, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=72249, PETRI_PLACES=752, PETRI_TRANSITIONS=2280} [2022-12-05 21:12:00,060 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 731 predicate places. [2022-12-05 21:12:00,060 INFO L495 AbstractCegarLoop]: Abstraction has has 752 places, 2280 transitions, 72249 flow [2022-12-05 21:12:00,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 32 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:12:00,060 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:12:00,060 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:12:00,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-12-05 21:12:00,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-12-05 21:12:00,268 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:12:00,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:12:00,269 INFO L85 PathProgramCache]: Analyzing trace with hash -778014478, now seen corresponding path program 50 times [2022-12-05 21:12:00,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:12:00,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136799919] [2022-12-05 21:12:00,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:12:00,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:12:00,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:12:01,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:12:01,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:12:01,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136799919] [2022-12-05 21:12:01,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136799919] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:12:01,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252873373] [2022-12-05 21:12:01,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:12:01,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:12:01,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:12:01,216 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:12:01,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-12-05 21:12:01,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:12:01,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:12:01,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-05 21:12:01,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:12:01,980 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:12:01,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 160 treesize of output 104 [2022-12-05 21:12:02,186 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:12:02,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:12:03,708 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:12:03,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 317 treesize of output 213 [2022-12-05 21:12:04,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:12:04,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252873373] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:12:04,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:12:04,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2022-12-05 21:12:04,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441587774] [2022-12-05 21:12:04,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:12:04,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-05 21:12:04,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:12:04,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-05 21:12:04,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-12-05 21:12:04,138 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:12:04,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 752 places, 2280 transitions, 72249 flow. Second operand has 26 states, 25 states have (on average 1.92) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:12:04,138 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:12:04,138 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:12:04,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:12:31,922 INFO L130 PetriNetUnfolder]: 11651/24520 cut-off events. [2022-12-05 21:12:31,922 INFO L131 PetriNetUnfolder]: For 1544333/1544333 co-relation queries the response was YES. [2022-12-05 21:12:32,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311852 conditions, 24520 events. 11651/24520 cut-off events. For 1544333/1544333 co-relation queries the response was YES. Maximal size of possible extension queue 1763. Compared 255719 event pairs, 3080 based on Foata normal form. 12/24532 useless extension candidates. Maximal degree in co-relation 311587. Up to 13972 conditions per place. [2022-12-05 21:12:32,453 INFO L137 encePairwiseOnDemand]: 9/17 looper letters, 1684 selfloop transitions, 815 changer transitions 26/2525 dead transitions. [2022-12-05 21:12:32,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 779 places, 2525 transitions, 84325 flow [2022-12-05 21:12:32,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-05 21:12:32,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-05 21:12:32,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 176 transitions. [2022-12-05 21:12:32,454 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.2957983193277311 [2022-12-05 21:12:32,454 INFO L175 Difference]: Start difference. First operand has 752 places, 2280 transitions, 72249 flow. Second operand 35 states and 176 transitions. [2022-12-05 21:12:32,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 779 places, 2525 transitions, 84325 flow [2022-12-05 21:13:09,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 754 places, 2525 transitions, 80379 flow, removed 1451 selfloop flow, removed 25 redundant places. [2022-12-05 21:13:09,216 INFO L231 Difference]: Finished difference. Result has 768 places, 2379 transitions, 74422 flow [2022-12-05 21:13:09,218 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=68637, PETRI_DIFFERENCE_MINUEND_PLACES=720, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=727, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=74422, PETRI_PLACES=768, PETRI_TRANSITIONS=2379} [2022-12-05 21:13:09,218 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 747 predicate places. [2022-12-05 21:13:09,218 INFO L495 AbstractCegarLoop]: Abstraction has has 768 places, 2379 transitions, 74422 flow [2022-12-05 21:13:09,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.92) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:13:09,218 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:13:09,218 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:13:09,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-12-05 21:13:09,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-12-05 21:13:09,419 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:13:09,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:13:09,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1504535922, now seen corresponding path program 51 times [2022-12-05 21:13:09,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:13:09,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764571734] [2022-12-05 21:13:09,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:13:09,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:13:09,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:13:10,182 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:13:10,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:13:10,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764571734] [2022-12-05 21:13:10,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764571734] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:13:10,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499084631] [2022-12-05 21:13:10,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:13:10,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:13:10,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:13:10,184 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:13:10,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-12-05 21:13:10,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-05 21:13:10,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:13:10,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-05 21:13:10,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:13:10,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 113 [2022-12-05 21:13:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:13:10,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:13:12,025 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:13:12,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 287 treesize of output 192 [2022-12-05 21:13:12,287 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:13:12,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499084631] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:13:12,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:13:12,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2022-12-05 21:13:12,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579410209] [2022-12-05 21:13:12,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:13:12,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-05 21:13:12,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:13:12,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-05 21:13:12,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-12-05 21:13:12,288 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:13:12,288 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 768 places, 2379 transitions, 74422 flow. Second operand has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:13:12,288 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:13:12,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:13:12,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:13:46,575 INFO L130 PetriNetUnfolder]: 13527/28226 cut-off events. [2022-12-05 21:13:46,575 INFO L131 PetriNetUnfolder]: For 1845540/1845540 co-relation queries the response was YES. [2022-12-05 21:13:47,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361876 conditions, 28226 events. 13527/28226 cut-off events. For 1845540/1845540 co-relation queries the response was YES. Maximal size of possible extension queue 1958. Compared 297609 event pairs, 2900 based on Foata normal form. 40/28266 useless extension candidates. Maximal degree in co-relation 361607. Up to 12440 conditions per place. [2022-12-05 21:13:47,244 INFO L137 encePairwiseOnDemand]: 9/17 looper letters, 1962 selfloop transitions, 958 changer transitions 30/2950 dead transitions. [2022-12-05 21:13:47,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 800 places, 2950 transitions, 98627 flow [2022-12-05 21:13:47,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-05 21:13:47,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-05 21:13:47,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 209 transitions. [2022-12-05 21:13:47,245 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.35126050420168065 [2022-12-05 21:13:47,245 INFO L175 Difference]: Start difference. First operand has 768 places, 2379 transitions, 74422 flow. Second operand 35 states and 209 transitions. [2022-12-05 21:13:47,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 800 places, 2950 transitions, 98627 flow [2022-12-05 21:14:29,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 789 places, 2950 transitions, 96890 flow, removed 653 selfloop flow, removed 11 redundant places. [2022-12-05 21:14:29,738 INFO L231 Difference]: Finished difference. Result has 801 places, 2709 transitions, 88445 flow [2022-12-05 21:14:29,740 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=72751, PETRI_DIFFERENCE_MINUEND_PLACES=755, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=708, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=88445, PETRI_PLACES=801, PETRI_TRANSITIONS=2709} [2022-12-05 21:14:29,740 INFO L294 CegarLoopForPetriNet]: 21 programPoint places, 780 predicate places. [2022-12-05 21:14:29,740 INFO L495 AbstractCegarLoop]: Abstraction has has 801 places, 2709 transitions, 88445 flow [2022-12-05 21:14:29,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 27 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:14:29,740 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:14:29,740 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:14:29,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-12-05 21:14:29,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-12-05 21:14:29,941 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:14:29,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:14:29,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1500302526, now seen corresponding path program 52 times [2022-12-05 21:14:29,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:14:29,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180694505] [2022-12-05 21:14:29,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:14:29,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:14:29,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:14:30,516 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:14:30,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:14:30,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180694505] [2022-12-05 21:14:30,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180694505] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:14:30,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402365588] [2022-12-05 21:14:30,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:14:30,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:14:30,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:14:30,518 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:14:30,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-12-05 21:14:30,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:14:30,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:14:30,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-05 21:14:30,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:14:31,339 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:14:31,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 160 treesize of output 104 [2022-12-05 21:14:31,491 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:14:31,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:14:33,288 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:14:33,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 371 treesize of output 238 [2022-12-05 21:14:33,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-05 21:14:33,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402365588] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:14:33,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:14:33,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 28 [2022-12-05 21:14:33,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35598794] [2022-12-05 21:14:33,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:14:33,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-05 21:14:33,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:14:33,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-05 21:14:33,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2022-12-05 21:14:33,692 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 17 [2022-12-05 21:14:33,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 801 places, 2709 transitions, 88445 flow. Second operand has 29 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:14:33,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:14:33,693 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 17 [2022-12-05 21:14:33,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:15:06,544 INFO L130 PetriNetUnfolder]: 13699/28604 cut-off events. [2022-12-05 21:15:06,545 INFO L131 PetriNetUnfolder]: For 1991649/1991649 co-relation queries the response was YES. [2022-12-05 21:15:07,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377913 conditions, 28604 events. 13699/28604 cut-off events. For 1991649/1991649 co-relation queries the response was YES. Maximal size of possible extension queue 1998. Compared 302428 event pairs, 1964 based on Foata normal form. 42/28646 useless extension candidates. Maximal degree in co-relation 377633. Up to 8408 conditions per place. [2022-12-05 21:15:07,508 INFO L137 encePairwiseOnDemand]: 8/17 looper letters, 1601 selfloop transitions, 1381 changer transitions 43/3025 dead transitions. [2022-12-05 21:15:07,508 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 827 places, 3025 transitions, 108026 flow [2022-12-05 21:15:07,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-05 21:15:07,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-05 21:15:07,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 155 transitions. [2022-12-05 21:15:07,509 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3144016227180527 [2022-12-05 21:15:07,509 INFO L175 Difference]: Start difference. First operand has 801 places, 2709 transitions, 88445 flow. Second operand 29 states and 155 transitions. [2022-12-05 21:15:07,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 827 places, 3025 transitions, 108026 flow Received shutdown request... [2022-12-05 21:15:35,400 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-12-05 21:15:35,404 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-05 21:15:35,404 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-05 21:15:35,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-12-05 21:15:35,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-12-05 21:15:35,602 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2022-12-05 21:15:35,603 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-12-05 21:15:35,604 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-12-05 21:15:35,604 INFO L458 BasicCegarLoop]: Path program histogram: [52, 6, 6, 5, 1] [2022-12-05 21:15:35,606 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-05 21:15:35,606 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-05 21:15:35,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.12 09:15:35 BasicIcfg [2022-12-05 21:15:35,608 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-05 21:15:35,608 INFO L158 Benchmark]: Toolchain (without parser) took 754477.24ms. Allocated memory was 183.5MB in the beginning and 6.1GB in the end (delta: 5.9GB). Free memory was 144.8MB in the beginning and 2.5GB in the end (delta: -2.3GB). Peak memory consumption was 3.7GB. Max. memory is 8.0GB. [2022-12-05 21:15:35,608 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 183.5MB. Free memory is still 160.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-12-05 21:15:35,608 INFO L158 Benchmark]: CACSL2BoogieTranslator took 272.57ms. Allocated memory is still 183.5MB. Free memory was 144.8MB in the beginning and 132.2MB in the end (delta: 12.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-12-05 21:15:35,609 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.82ms. Allocated memory is still 183.5MB. Free memory was 132.2MB in the beginning and 130.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-05 21:15:35,609 INFO L158 Benchmark]: Boogie Preprocessor took 52.07ms. Allocated memory is still 183.5MB. Free memory was 130.1MB in the beginning and 128.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-05 21:15:35,609 INFO L158 Benchmark]: RCFGBuilder took 581.67ms. Allocated memory is still 183.5MB. Free memory was 128.0MB in the beginning and 107.6MB in the end (delta: 20.4MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. [2022-12-05 21:15:35,609 INFO L158 Benchmark]: TraceAbstraction took 753506.67ms. Allocated memory was 183.5MB in the beginning and 6.1GB in the end (delta: 5.9GB). Free memory was 106.5MB in the beginning and 2.5GB in the end (delta: -2.4GB). Peak memory consumption was 3.6GB. Max. memory is 8.0GB. [2022-12-05 21:15:35,610 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 183.5MB. Free memory is still 160.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 272.57ms. Allocated memory is still 183.5MB. Free memory was 144.8MB in the beginning and 132.2MB in the end (delta: 12.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 57.82ms. Allocated memory is still 183.5MB. Free memory was 132.2MB in the beginning and 130.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 52.07ms. Allocated memory is still 183.5MB. Free memory was 130.1MB in the beginning and 128.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 581.67ms. Allocated memory is still 183.5MB. Free memory was 128.0MB in the beginning and 107.6MB in the end (delta: 20.4MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. * TraceAbstraction took 753506.67ms. Allocated memory was 183.5MB in the beginning and 6.1GB in the end (delta: 5.9GB). Free memory was 106.5MB in the beginning and 2.5GB in the end (delta: -2.4GB). Peak memory consumption was 3.6GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 9.5s, 225 PlacesBefore, 21 PlacesAfterwards, 237 TransitionsBefore, 17 TransitionsAfterwards, 9548 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 91 TrivialYvCompositions, 113 ConcurrentYvCompositions, 16 ChoiceCompositions, 220 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 5934, independent: 5931, independent conditional: 5931, independent unconditional: 0, dependent: 3, dependent conditional: 3, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 5934, independent: 5931, independent conditional: 0, independent unconditional: 5931, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 5934, independent: 5931, independent conditional: 0, independent unconditional: 5931, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 5934, independent: 5931, independent conditional: 0, independent unconditional: 5931, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 5064, independent: 5061, independent conditional: 0, independent unconditional: 5061, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 5064, independent: 5061, independent conditional: 0, independent unconditional: 5061, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 3, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 6, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 5934, independent: 870, independent conditional: 0, independent unconditional: 870, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 5064, unknown conditional: 0, unknown unconditional: 5064] , Statistics on independence cache: Total cache size (in pairs): 10814, Positive cache size: 10811, Positive conditional cache size: 0, Positive unconditional cache size: 10811, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - TimeoutResultAtElement [Line: 113]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 108]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 107]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 343 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 753.3s, OverallIterations: 70, TraceHistogramMax: 3, PathProgramHistogramMax: 52, EmptinessCheckTime: 0.0s, AutomataDifference: 615.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 9.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8851 SdHoareTripleChecker+Valid, 25.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8851 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 22.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 52 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1918 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 40200 IncrementalHoareTripleChecker+Invalid, 42170 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1918 mSolverCounterUnsat, 0 mSDtfsCounter, 40200 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4247 GetRequests, 1976 SyntacticMatches, 13 SemanticMatches, 2258 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 24015 ImplicationChecksByTransitivity, 144.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=88445occurred in iteration=69, InterpolantAutomatonStates: 1205, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 3.4s SatisfiabilityAnalysisTime, 107.8s InterpolantComputationTime, 2429 NumberOfCodeBlocks, 2423 NumberOfCodeBlocksAsserted, 185 NumberOfCheckSat, 3319 ConstructedInterpolants, 6 QuantifiedInterpolants, 73716 SizeOfPredicates, 1778 NumberOfNonLiveVariables, 12124 ConjunctsInSsa, 2168 ConjunctsInUnsatCore, 176 InterpolantComputations, 17 PerfectInterpolantSequences, 1095/1739 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 RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown