/usr/bin/java -Xmx16000000000 -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-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 19:22:42,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 19:22:42,440 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 19:22:42,458 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 19:22:42,458 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 19:22:42,459 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 19:22:42,460 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 19:22:42,468 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 19:22:42,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 19:22:42,473 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 19:22:42,474 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 19:22:42,475 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 19:22:42,475 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 19:22:42,477 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 19:22:42,479 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 19:22:42,479 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 19:22:42,480 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 19:22:42,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 19:22:42,483 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 19:22:42,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 19:22:42,487 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 19:22:42,490 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 19:22:42,490 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 19:22:42,491 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 19:22:42,492 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 19:22:42,497 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 19:22:42,497 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 19:22:42,498 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 19:22:42,502 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-VariableLbe.epf [2023-01-27 19:22:42,528 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 19:22:42,531 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 19:22:42,532 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 19:22:42,532 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 19:22:42,533 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 19:22:42,533 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 19:22:42,533 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 19:22:42,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 19:22:42,533 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 19:22:42,533 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 19:22:42,534 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 19:22:42,534 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 19:22:42,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 19:22:42,534 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 19:22:42,534 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 19:22:42,534 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 19:22:42,534 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 19:22:42,534 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 19:22:42,534 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 19:22:42,535 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 19:22:42,535 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 19:22:42,535 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 19:22:42,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 19:22:42,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:22:42,535 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 19:22:42,535 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 19:22:42,535 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 19:22:42,535 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 19:22:42,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 19:22:42,536 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 19:22:42,536 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 19:22:42,536 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 19:22:42,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 19:22:42,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 19:22:42,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 19:22:42,769 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 19:22:42,769 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 19:22:42,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.i [2023-01-27 19:22:43,789 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 19:22:44,017 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 19:22:44,017 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.i [2023-01-27 19:22:44,026 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e13b3ceea/60b168e34b1a4059b95ab139c4d979e1/FLAG1f7de6930 [2023-01-27 19:22:44,037 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e13b3ceea/60b168e34b1a4059b95ab139c4d979e1 [2023-01-27 19:22:44,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 19:22:44,039 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 19:22:44,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 19:22:44,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 19:22:44,042 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 19:22:44,043 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:22:44" (1/1) ... [2023-01-27 19:22:44,043 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d59a25a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:22:44, skipping insertion in model container [2023-01-27 19:22:44,043 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:22:44" (1/1) ... [2023-01-27 19:22:44,048 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 19:22:44,080 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 19:22:44,335 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.i[41323,41336] [2023-01-27 19:22:44,362 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:22:44,385 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 19:22:44,420 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.i[41323,41336] [2023-01-27 19:22:44,439 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:22:44,480 INFO L208 MainTranslator]: Completed translation [2023-01-27 19:22:44,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:22:44 WrapperNode [2023-01-27 19:22:44,481 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 19:22:44,482 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 19:22:44,482 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 19:22:44,482 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 19:22:44,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:22:44" (1/1) ... [2023-01-27 19:22:44,501 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:22:44" (1/1) ... [2023-01-27 19:22:44,518 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 193 [2023-01-27 19:22:44,518 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 19:22:44,518 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 19:22:44,519 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 19:22:44,519 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 19:22:44,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:22:44" (1/1) ... [2023-01-27 19:22:44,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:22:44" (1/1) ... [2023-01-27 19:22:44,536 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:22:44" (1/1) ... [2023-01-27 19:22:44,536 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:22:44" (1/1) ... [2023-01-27 19:22:44,542 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:22:44" (1/1) ... [2023-01-27 19:22:44,545 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:22:44" (1/1) ... [2023-01-27 19:22:44,546 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:22:44" (1/1) ... [2023-01-27 19:22:44,547 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:22:44" (1/1) ... [2023-01-27 19:22:44,549 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 19:22:44,550 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 19:22:44,550 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 19:22:44,550 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 19:22:44,551 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:22:44" (1/1) ... [2023-01-27 19:22:44,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:22:44,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:22:44,594 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) [2023-01-27 19:22:44,599 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 [2023-01-27 19:22:44,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 19:22:44,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 19:22:44,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 19:22:44,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 19:22:44,623 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-27 19:22:44,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 19:22:44,623 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-27 19:22:44,623 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-27 19:22:44,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 19:22:44,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 19:22:44,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 19:22:44,625 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 19:22:44,784 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 19:22:44,785 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 19:22:44,999 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 19:22:45,006 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 19:22:45,006 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-01-27 19:22:45,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:22:45 BoogieIcfgContainer [2023-01-27 19:22:45,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 19:22:45,009 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 19:22:45,009 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 19:22:45,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 19:22:45,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 07:22:44" (1/3) ... [2023-01-27 19:22:45,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76f8e48d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:22:45, skipping insertion in model container [2023-01-27 19:22:45,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:22:44" (2/3) ... [2023-01-27 19:22:45,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76f8e48d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:22:45, skipping insertion in model container [2023-01-27 19:22:45,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:22:45" (3/3) ... [2023-01-27 19:22:45,013 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_76-tricky_address3_racefree.i [2023-01-27 19:22:45,024 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 19:22:45,024 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-01-27 19:22:45,024 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 19:22:45,074 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-27 19:22:45,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 193 transitions, 394 flow [2023-01-27 19:22:45,198 INFO L130 PetriNetUnfolder]: 45/263 cut-off events. [2023-01-27 19:22:45,198 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-01-27 19:22:45,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 263 events. 45/263 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 814 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 146. Up to 8 conditions per place. [2023-01-27 19:22:45,205 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 193 transitions, 394 flow [2023-01-27 19:22:45,212 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 188 transitions, 381 flow [2023-01-27 19:22:45,215 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:22:45,232 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 188 transitions, 381 flow [2023-01-27 19:22:45,234 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 188 transitions, 381 flow [2023-01-27 19:22:45,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 188 transitions, 381 flow [2023-01-27 19:22:45,281 INFO L130 PetriNetUnfolder]: 44/258 cut-off events. [2023-01-27 19:22:45,281 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:22:45,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 258 events. 44/258 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 778 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 146. Up to 8 conditions per place. [2023-01-27 19:22:45,291 INFO L119 LiptonReduction]: Number of co-enabled transitions 10792 [2023-01-27 19:22:47,633 INFO L134 LiptonReduction]: Checked pairs total: 17790 [2023-01-27 19:22:47,634 INFO L136 LiptonReduction]: Total number of compositions: 164 [2023-01-27 19:22:47,658 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:22:47,664 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;@20df05fa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:22:47,665 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-27 19:22:47,671 INFO L130 PetriNetUnfolder]: 5/27 cut-off events. [2023-01-27 19:22:47,671 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:22:47,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:22:47,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-27 19:22:47,673 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 19:22:47,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:22:47,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1355205613, now seen corresponding path program 1 times [2023-01-27 19:22:47,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:22:47,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104335011] [2023-01-27 19:22:47,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:22:47,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:22:47,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:22:47,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:22:47,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:22:47,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104335011] [2023-01-27 19:22:47,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104335011] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:22:47,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:22:47,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:22:47,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332995840] [2023-01-27 19:22:47,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:22:47,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:22:47,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:22:47,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:22:47,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:22:47,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 357 [2023-01-27 19:22:47,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 66 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:47,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:22:47,877 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 357 [2023-01-27 19:22:47,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:22:47,984 INFO L130 PetriNetUnfolder]: 272/614 cut-off events. [2023-01-27 19:22:47,985 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:22:47,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1149 conditions, 614 events. 272/614 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3057 event pairs, 238 based on Foata normal form. 118/640 useless extension candidates. Maximal degree in co-relation 1094. Up to 528 conditions per place. [2023-01-27 19:22:47,988 INFO L137 encePairwiseOnDemand]: 332/357 looper letters, 34 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-01-27 19:22:47,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 167 flow [2023-01-27 19:22:47,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:22:47,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:22:47,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 524 transitions. [2023-01-27 19:22:48,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4892623716153128 [2023-01-27 19:22:48,002 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 524 transitions. [2023-01-27 19:22:48,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 524 transitions. [2023-01-27 19:22:48,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:22:48,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 524 transitions. [2023-01-27 19:22:48,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:48,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:48,015 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:48,016 INFO L175 Difference]: Start difference. First operand has 45 places, 66 transitions, 137 flow. Second operand 3 states and 524 transitions. [2023-01-27 19:22:48,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 167 flow [2023-01-27 19:22:48,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 167 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:22:48,020 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 105 flow [2023-01-27 19:22:48,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2023-01-27 19:22:48,024 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2023-01-27 19:22:48,024 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 105 flow [2023-01-27 19:22:48,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:48,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:22:48,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:22:48,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 19:22:48,025 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 19:22:48,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:22:48,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1202044733, now seen corresponding path program 1 times [2023-01-27 19:22:48,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:22:48,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340853507] [2023-01-27 19:22:48,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:22:48,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:22:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:22:48,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:22:48,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:22:48,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340853507] [2023-01-27 19:22:48,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340853507] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:22:48,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818316753] [2023-01-27 19:22:48,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:22:48,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:22:48,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:22:48,104 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) [2023-01-27 19:22:48,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 19:22:48,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:22:48,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2023-01-27 19:22:48,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:22:48,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 19:22:48,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 19:22:48,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818316753] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:22:48,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 19:22:48,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-01-27 19:22:48,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190606620] [2023-01-27 19:22:48,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:22:48,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:22:48,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:22:48,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:22:48,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 19:22:48,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 357 [2023-01-27 19:22:48,213 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:48,213 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:22:48,213 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 357 [2023-01-27 19:22:48,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:22:48,345 INFO L130 PetriNetUnfolder]: 255/592 cut-off events. [2023-01-27 19:22:48,345 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:22:48,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1132 conditions, 592 events. 255/592 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3266 event pairs, 0 based on Foata normal form. 0/510 useless extension candidates. Maximal degree in co-relation 1120. Up to 497 conditions per place. [2023-01-27 19:22:48,347 INFO L137 encePairwiseOnDemand]: 354/357 looper letters, 49 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-01-27 19:22:48,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 60 transitions, 237 flow [2023-01-27 19:22:48,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:22:48,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:22:48,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 516 transitions. [2023-01-27 19:22:48,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48179271708683474 [2023-01-27 19:22:48,349 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 516 transitions. [2023-01-27 19:22:48,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 516 transitions. [2023-01-27 19:22:48,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:22:48,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 516 transitions. [2023-01-27 19:22:48,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:48,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:48,352 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:48,352 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 105 flow. Second operand 3 states and 516 transitions. [2023-01-27 19:22:48,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 60 transitions, 237 flow [2023-01-27 19:22:48,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 60 transitions, 233 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 19:22:48,354 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 109 flow [2023-01-27 19:22:48,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-01-27 19:22:48,355 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 4 predicate places. [2023-01-27 19:22:48,355 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 109 flow [2023-01-27 19:22:48,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:48,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:22:48,356 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-01-27 19:22:48,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-27 19:22:48,563 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 [2023-01-27 19:22:48,564 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 19:22:48,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:22:48,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1382333179, now seen corresponding path program 1 times [2023-01-27 19:22:48,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:22:48,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945324942] [2023-01-27 19:22:48,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:22:48,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:22:48,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:22:48,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:22:48,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:22:48,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945324942] [2023-01-27 19:22:48,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945324942] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:22:48,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121106123] [2023-01-27 19:22:48,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:22:48,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:22:48,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:22:48,632 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) [2023-01-27 19:22:48,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 19:22:48,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:22:48,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:22:48,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:22:48,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:22:48,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:22:48,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:22:48,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121106123] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:22:48,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:22:48,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:22:48,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474291313] [2023-01-27 19:22:48,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:22:48,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:22:48,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:22:48,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:22:48,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:22:48,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 357 [2023-01-27 19:22:48,738 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 109 flow. Second operand has 7 states, 7 states have (on average 156.57142857142858) internal successors, (1096), 7 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:48,738 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:22:48,738 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 357 [2023-01-27 19:22:48,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:22:48,842 INFO L130 PetriNetUnfolder]: 271/599 cut-off events. [2023-01-27 19:22:48,842 INFO L131 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2023-01-27 19:22:48,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1176 conditions, 599 events. 271/599 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2938 event pairs, 238 based on Foata normal form. 3/529 useless extension candidates. Maximal degree in co-relation 1149. Up to 513 conditions per place. [2023-01-27 19:22:48,844 INFO L137 encePairwiseOnDemand]: 354/357 looper letters, 34 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2023-01-27 19:22:48,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 48 transitions, 199 flow [2023-01-27 19:22:48,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:22:48,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:22:48,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 972 transitions. [2023-01-27 19:22:48,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453781512605042 [2023-01-27 19:22:48,847 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 972 transitions. [2023-01-27 19:22:48,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 972 transitions. [2023-01-27 19:22:48,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:22:48,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 972 transitions. [2023-01-27 19:22:48,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 162.0) internal successors, (972), 6 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:48,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 357.0) internal successors, (2499), 7 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:48,852 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 357.0) internal successors, (2499), 7 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:48,852 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 109 flow. Second operand 6 states and 972 transitions. [2023-01-27 19:22:48,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 48 transitions, 199 flow [2023-01-27 19:22:48,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 48 transitions, 195 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 19:22:48,854 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 141 flow [2023-01-27 19:22:48,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=141, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2023-01-27 19:22:48,855 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2023-01-27 19:22:48,855 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 141 flow [2023-01-27 19:22:48,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 156.57142857142858) internal successors, (1096), 7 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:48,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:22:48,856 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-01-27 19:22:48,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-01-27 19:22:49,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-01-27 19:22:49,061 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 19:22:49,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:22:49,062 INFO L85 PathProgramCache]: Analyzing trace with hash 941146001, now seen corresponding path program 2 times [2023-01-27 19:22:49,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:22:49,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252947270] [2023-01-27 19:22:49,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:22:49,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:22:49,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:22:49,141 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:22:49,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:22:49,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252947270] [2023-01-27 19:22:49,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252947270] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:22:49,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467364005] [2023-01-27 19:22:49,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 19:22:49,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:22:49,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:22:49,143 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) [2023-01-27 19:22:49,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 19:22:49,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 19:22:49,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:22:49,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 19:22:49,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:22:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:22:49,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:22:49,261 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:22:49,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467364005] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:22:49,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:22:49,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-27 19:22:49,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70390539] [2023-01-27 19:22:49,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:22:49,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-27 19:22:49,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:22:49,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-27 19:22:49,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-01-27 19:22:49,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 357 [2023-01-27 19:22:49,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 141 flow. Second operand has 13 states, 13 states have (on average 156.30769230769232) internal successors, (2032), 13 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:49,266 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:22:49,266 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 357 [2023-01-27 19:22:49,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:22:49,391 INFO L130 PetriNetUnfolder]: 270/602 cut-off events. [2023-01-27 19:22:49,391 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2023-01-27 19:22:49,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1197 conditions, 602 events. 270/602 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2934 event pairs, 238 based on Foata normal form. 6/536 useless extension candidates. Maximal degree in co-relation 1138. Up to 513 conditions per place. [2023-01-27 19:22:49,393 INFO L137 encePairwiseOnDemand]: 354/357 looper letters, 34 selfloop transitions, 11 changer transitions 0/54 dead transitions. [2023-01-27 19:22:49,393 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 54 transitions, 267 flow [2023-01-27 19:22:49,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-27 19:22:49,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-27 19:22:49,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1911 transitions. [2023-01-27 19:22:49,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44607843137254904 [2023-01-27 19:22:49,397 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1911 transitions. [2023-01-27 19:22:49,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1911 transitions. [2023-01-27 19:22:49,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:22:49,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1911 transitions. [2023-01-27 19:22:49,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 159.25) internal successors, (1911), 12 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:49,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 357.0) internal successors, (4641), 13 states have internal predecessors, (4641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:49,405 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 357.0) internal successors, (4641), 13 states have internal predecessors, (4641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:49,405 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 141 flow. Second operand 12 states and 1911 transitions. [2023-01-27 19:22:49,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 54 transitions, 267 flow [2023-01-27 19:22:49,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 54 transitions, 253 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-27 19:22:49,407 INFO L231 Difference]: Finished difference. Result has 71 places, 54 transitions, 211 flow [2023-01-27 19:22:49,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=211, PETRI_PLACES=71, PETRI_TRANSITIONS=54} [2023-01-27 19:22:49,408 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 26 predicate places. [2023-01-27 19:22:49,408 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 54 transitions, 211 flow [2023-01-27 19:22:49,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 156.30769230769232) internal successors, (2032), 13 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:49,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:22:49,409 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-01-27 19:22:49,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-01-27 19:22:49,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:22:49,617 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 19:22:49,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:22:49,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1854023505, now seen corresponding path program 3 times [2023-01-27 19:22:49,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:22:49,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032792521] [2023-01-27 19:22:49,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:22:49,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:22:49,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:22:49,640 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:22:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:22:49,664 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:22:49,664 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:22:49,665 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-01-27 19:22:49,666 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-01-27 19:22:49,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-01-27 19:22:49,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-01-27 19:22:49,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 19:22:49,667 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2023-01-27 19:22:49,669 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:22:49,669 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-27 19:22:49,695 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 19:22:49,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 266 transitions, 550 flow [2023-01-27 19:22:49,746 INFO L130 PetriNetUnfolder]: 75/430 cut-off events. [2023-01-27 19:22:49,747 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-01-27 19:22:49,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 430 events. 75/430 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1680 event pairs, 0 based on Foata normal form. 0/346 useless extension candidates. Maximal degree in co-relation 265. Up to 12 conditions per place. [2023-01-27 19:22:49,750 INFO L82 GeneralOperation]: Start removeDead. Operand has 226 places, 266 transitions, 550 flow [2023-01-27 19:22:49,753 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 226 places, 266 transitions, 550 flow [2023-01-27 19:22:49,753 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:22:49,753 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 226 places, 266 transitions, 550 flow [2023-01-27 19:22:49,753 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 226 places, 266 transitions, 550 flow [2023-01-27 19:22:49,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 266 transitions, 550 flow [2023-01-27 19:22:49,786 INFO L130 PetriNetUnfolder]: 75/430 cut-off events. [2023-01-27 19:22:49,786 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-01-27 19:22:49,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 430 events. 75/430 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1680 event pairs, 0 based on Foata normal form. 0/346 useless extension candidates. Maximal degree in co-relation 265. Up to 12 conditions per place. [2023-01-27 19:22:49,856 INFO L119 LiptonReduction]: Number of co-enabled transitions 33228 [2023-01-27 19:22:52,030 INFO L134 LiptonReduction]: Checked pairs total: 56804 [2023-01-27 19:22:52,030 INFO L136 LiptonReduction]: Total number of compositions: 219 [2023-01-27 19:22:52,031 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:22:52,034 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;@20df05fa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:22:52,035 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-27 19:22:52,036 INFO L130 PetriNetUnfolder]: 8/30 cut-off events. [2023-01-27 19:22:52,036 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:22:52,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:22:52,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-27 19:22:52,037 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:22:52,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:22:52,037 INFO L85 PathProgramCache]: Analyzing trace with hash 685324257, now seen corresponding path program 1 times [2023-01-27 19:22:52,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:22:52,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220453595] [2023-01-27 19:22:52,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:22:52,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:22:52,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:22:52,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:22:52,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:22:52,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220453595] [2023-01-27 19:22:52,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220453595] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:22:52,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:22:52,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:22:52,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60574815] [2023-01-27 19:22:52,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:22:52,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:22:52,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:22:52,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:22:52,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:22:52,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 485 [2023-01-27 19:22:52,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 101 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:52,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:22:52,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 485 [2023-01-27 19:22:52,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:22:53,129 INFO L130 PetriNetUnfolder]: 10559/16533 cut-off events. [2023-01-27 19:22:53,129 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-01-27 19:22:53,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32068 conditions, 16533 events. 10559/16533 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 109159 event pairs, 9818 based on Foata normal form. 2499/16469 useless extension candidates. Maximal degree in co-relation 13984. Up to 15431 conditions per place. [2023-01-27 19:22:53,190 INFO L137 encePairwiseOnDemand]: 450/485 looper letters, 56 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-01-27 19:22:53,191 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 274 flow [2023-01-27 19:22:53,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:22:53,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:22:53,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 730 transitions. [2023-01-27 19:22:53,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5017182130584192 [2023-01-27 19:22:53,198 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 730 transitions. [2023-01-27 19:22:53,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 730 transitions. [2023-01-27 19:22:53,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:22:53,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 730 transitions. [2023-01-27 19:22:53,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.33333333333334) internal successors, (730), 3 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:53,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:53,202 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:53,202 INFO L175 Difference]: Start difference. First operand has 68 places, 101 transitions, 220 flow. Second operand 3 states and 730 transitions. [2023-01-27 19:22:53,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 274 flow [2023-01-27 19:22:53,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 274 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:22:53,205 INFO L231 Difference]: Finished difference. Result has 71 places, 70 transitions, 168 flow [2023-01-27 19:22:53,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=71, PETRI_TRANSITIONS=70} [2023-01-27 19:22:53,208 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-01-27 19:22:53,208 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 70 transitions, 168 flow [2023-01-27 19:22:53,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:53,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:22:53,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:22:53,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 19:22:53,208 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:22:53,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:22:53,209 INFO L85 PathProgramCache]: Analyzing trace with hash -909660943, now seen corresponding path program 1 times [2023-01-27 19:22:53,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:22:53,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915582709] [2023-01-27 19:22:53,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:22:53,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:22:53,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:22:53,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:22:53,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:22:53,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915582709] [2023-01-27 19:22:53,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915582709] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:22:53,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963747562] [2023-01-27 19:22:53,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:22:53,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:22:53,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:22:53,275 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) [2023-01-27 19:22:53,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-27 19:22:53,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:22:53,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 2 conjunts are in the unsatisfiable core [2023-01-27 19:22:53,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:22:53,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 19:22:53,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 19:22:53,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963747562] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:22:53,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 19:22:53,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-01-27 19:22:53,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123291182] [2023-01-27 19:22:53,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:22:53,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:22:53,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:22:53,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:22:53,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 19:22:53,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 485 [2023-01-27 19:22:53,485 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:53,485 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:22:53,485 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 485 [2023-01-27 19:22:53,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:22:54,412 INFO L130 PetriNetUnfolder]: 10416/16508 cut-off events. [2023-01-27 19:22:54,412 INFO L131 PetriNetUnfolder]: For 83/83 co-relation queries the response was YES. [2023-01-27 19:22:54,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32058 conditions, 16508 events. 10416/16508 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 111734 event pairs, 4650 based on Foata normal form. 0/13980 useless extension candidates. Maximal degree in co-relation 32045. Up to 15399 conditions per place. [2023-01-27 19:22:54,499 INFO L137 encePairwiseOnDemand]: 482/485 looper letters, 74 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2023-01-27 19:22:54,499 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 88 transitions, 356 flow [2023-01-27 19:22:54,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:22:54,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:22:54,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 715 transitions. [2023-01-27 19:22:54,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49140893470790376 [2023-01-27 19:22:54,502 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 715 transitions. [2023-01-27 19:22:54,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 715 transitions. [2023-01-27 19:22:54,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:22:54,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 715 transitions. [2023-01-27 19:22:54,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 238.33333333333334) internal successors, (715), 3 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:54,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:54,505 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:54,505 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 168 flow. Second operand 3 states and 715 transitions. [2023-01-27 19:22:54,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 88 transitions, 356 flow [2023-01-27 19:22:54,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 88 transitions, 352 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 19:22:54,511 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 176 flow [2023-01-27 19:22:54,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2023-01-27 19:22:54,512 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 5 predicate places. [2023-01-27 19:22:54,512 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 176 flow [2023-01-27 19:22:54,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:54,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:22:54,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:22:54,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-27 19:22:54,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:22:54,734 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:22:54,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:22:54,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1710054241, now seen corresponding path program 1 times [2023-01-27 19:22:54,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:22:54,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336068995] [2023-01-27 19:22:54,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:22:54,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:22:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:22:54,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:22:54,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:22:54,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336068995] [2023-01-27 19:22:54,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336068995] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:22:54,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389047271] [2023-01-27 19:22:54,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:22:54,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:22:54,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:22:54,799 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) [2023-01-27 19:22:54,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-27 19:22:54,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:22:54,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:22:54,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:22:54,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:22:54,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:22:54,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:22:54,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389047271] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:22:54,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:22:54,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:22:54,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364505046] [2023-01-27 19:22:54,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:22:54,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:22:54,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:22:54,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:22:54,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:22:54,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 485 [2023-01-27 19:22:54,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 176 flow. Second operand has 7 states, 7 states have (on average 215.0) internal successors, (1505), 7 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:54,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:22:54,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 485 [2023-01-27 19:22:54,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:22:55,863 INFO L130 PetriNetUnfolder]: 10623/16504 cut-off events. [2023-01-27 19:22:55,863 INFO L131 PetriNetUnfolder]: For 685/685 co-relation queries the response was YES. [2023-01-27 19:22:56,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32633 conditions, 16504 events. 10623/16504 cut-off events. For 685/685 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 108155 event pairs, 9818 based on Foata normal form. 3/14244 useless extension candidates. Maximal degree in co-relation 32605. Up to 15417 conditions per place. [2023-01-27 19:22:56,037 INFO L137 encePairwiseOnDemand]: 482/485 looper letters, 57 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2023-01-27 19:22:56,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 74 transitions, 312 flow [2023-01-27 19:22:56,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:22:56,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:22:56,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1342 transitions. [2023-01-27 19:22:56,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4611683848797251 [2023-01-27 19:22:56,049 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1342 transitions. [2023-01-27 19:22:56,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1342 transitions. [2023-01-27 19:22:56,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:22:56,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1342 transitions. [2023-01-27 19:22:56,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 223.66666666666666) internal successors, (1342), 6 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:56,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 485.0) internal successors, (3395), 7 states have internal predecessors, (3395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:56,054 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 485.0) internal successors, (3395), 7 states have internal predecessors, (3395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:56,054 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 176 flow. Second operand 6 states and 1342 transitions. [2023-01-27 19:22:56,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 74 transitions, 312 flow [2023-01-27 19:22:56,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 74 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 19:22:56,057 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 210 flow [2023-01-27 19:22:56,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2023-01-27 19:22:56,057 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 12 predicate places. [2023-01-27 19:22:56,058 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 210 flow [2023-01-27 19:22:56,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 215.0) internal successors, (1505), 7 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:56,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:22:56,058 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:22:56,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-27 19:22:56,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:22:56,259 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:22:56,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:22:56,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1658605999, now seen corresponding path program 2 times [2023-01-27 19:22:56,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:22:56,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497120843] [2023-01-27 19:22:56,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:22:56,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:22:56,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:22:56,350 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:22:56,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:22:56,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497120843] [2023-01-27 19:22:56,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497120843] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:22:56,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90962067] [2023-01-27 19:22:56,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 19:22:56,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:22:56,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:22:56,362 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) [2023-01-27 19:22:56,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-27 19:22:56,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-27 19:22:56,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:22:56,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 24 conjunts are in the unsatisfiable core [2023-01-27 19:22:56,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:22:56,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-01-27 19:22:56,529 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 19:22:56,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-27 19:22:56,557 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 13 treesize of output 15 [2023-01-27 19:22:56,594 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-27 19:22:56,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 19:22:56,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90962067] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:22:56,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 19:22:56,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-01-27 19:22:56,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452921297] [2023-01-27 19:22:56,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:22:56,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 19:22:56,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:22:56,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 19:22:56,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-01-27 19:22:56,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 485 [2023-01-27 19:22:56,597 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 210 flow. Second operand has 6 states, 6 states have (on average 179.5) internal successors, (1077), 6 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:56,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:22:56,597 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 485 [2023-01-27 19:22:56,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:22:58,002 INFO L130 PetriNetUnfolder]: 11566/18234 cut-off events. [2023-01-27 19:22:58,002 INFO L131 PetriNetUnfolder]: For 706/706 co-relation queries the response was YES. [2023-01-27 19:22:58,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36407 conditions, 18234 events. 11566/18234 cut-off events. For 706/706 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 124829 event pairs, 2815 based on Foata normal form. 0/16003 useless extension candidates. Maximal degree in co-relation 36371. Up to 13532 conditions per place. [2023-01-27 19:22:58,084 INFO L137 encePairwiseOnDemand]: 476/485 looper letters, 135 selfloop transitions, 14 changer transitions 9/169 dead transitions. [2023-01-27 19:22:58,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 169 transitions, 747 flow [2023-01-27 19:22:58,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:22:58,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:22:58,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1223 transitions. [2023-01-27 19:22:58,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4202749140893471 [2023-01-27 19:22:58,087 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1223 transitions. [2023-01-27 19:22:58,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1223 transitions. [2023-01-27 19:22:58,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:22:58,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1223 transitions. [2023-01-27 19:22:58,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 203.83333333333334) internal successors, (1223), 6 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:58,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 485.0) internal successors, (3395), 7 states have internal predecessors, (3395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:58,093 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 485.0) internal successors, (3395), 7 states have internal predecessors, (3395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:58,093 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 210 flow. Second operand 6 states and 1223 transitions. [2023-01-27 19:22:58,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 169 transitions, 747 flow [2023-01-27 19:22:58,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 169 transitions, 733 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-27 19:22:58,096 INFO L231 Difference]: Finished difference. Result has 87 places, 86 transitions, 280 flow [2023-01-27 19:22:58,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=280, PETRI_PLACES=87, PETRI_TRANSITIONS=86} [2023-01-27 19:22:58,096 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 19 predicate places. [2023-01-27 19:22:58,096 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 86 transitions, 280 flow [2023-01-27 19:22:58,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 179.5) internal successors, (1077), 6 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:58,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:22:58,097 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-01-27 19:22:58,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-27 19:22:58,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:22:58,302 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:22:58,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:22:58,303 INFO L85 PathProgramCache]: Analyzing trace with hash -845271688, now seen corresponding path program 1 times [2023-01-27 19:22:58,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:22:58,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928330385] [2023-01-27 19:22:58,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:22:58,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:22:58,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:22:58,360 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-27 19:22:58,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:22:58,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928330385] [2023-01-27 19:22:58,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928330385] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:22:58,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072120251] [2023-01-27 19:22:58,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:22:58,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:22:58,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:22:58,364 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) [2023-01-27 19:22:58,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-27 19:22:58,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:22:58,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 19:22:58,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:22:58,441 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-27 19:22:58,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:22:58,477 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-27 19:22:58,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072120251] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:22:58,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:22:58,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-27 19:22:58,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581114953] [2023-01-27 19:22:58,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:22:58,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-27 19:22:58,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:22:58,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-27 19:22:58,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-01-27 19:22:58,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 485 [2023-01-27 19:22:58,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 86 transitions, 280 flow. Second operand has 13 states, 13 states have (on average 214.3846153846154) internal successors, (2787), 13 states have internal predecessors, (2787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:58,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:22:58,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 485 [2023-01-27 19:22:58,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:22:59,647 INFO L130 PetriNetUnfolder]: 11004/17512 cut-off events. [2023-01-27 19:22:59,648 INFO L131 PetriNetUnfolder]: For 3607/3607 co-relation queries the response was YES. [2023-01-27 19:22:59,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38053 conditions, 17512 events. 11004/17512 cut-off events. For 3607/3607 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 120714 event pairs, 9683 based on Foata normal form. 6/16099 useless extension candidates. Maximal degree in co-relation 37995. Up to 16586 conditions per place. [2023-01-27 19:22:59,775 INFO L137 encePairwiseOnDemand]: 482/485 looper letters, 69 selfloop transitions, 11 changer transitions 0/92 dead transitions. [2023-01-27 19:22:59,775 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 92 transitions, 476 flow [2023-01-27 19:22:59,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-27 19:22:59,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-27 19:22:59,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2629 transitions. [2023-01-27 19:22:59,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45171821305841925 [2023-01-27 19:22:59,781 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2629 transitions. [2023-01-27 19:22:59,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2629 transitions. [2023-01-27 19:22:59,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:22:59,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2629 transitions. [2023-01-27 19:22:59,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 219.08333333333334) internal successors, (2629), 12 states have internal predecessors, (2629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:59,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 485.0) internal successors, (6305), 13 states have internal predecessors, (6305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:59,794 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 485.0) internal successors, (6305), 13 states have internal predecessors, (6305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:59,794 INFO L175 Difference]: Start difference. First operand has 87 places, 86 transitions, 280 flow. Second operand 12 states and 2629 transitions. [2023-01-27 19:22:59,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 92 transitions, 476 flow [2023-01-27 19:22:59,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 92 transitions, 476 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:22:59,803 INFO L231 Difference]: Finished difference. Result has 104 places, 92 transitions, 364 flow [2023-01-27 19:22:59,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=364, PETRI_PLACES=104, PETRI_TRANSITIONS=92} [2023-01-27 19:22:59,803 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 36 predicate places. [2023-01-27 19:22:59,803 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 92 transitions, 364 flow [2023-01-27 19:22:59,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 214.3846153846154) internal successors, (2787), 13 states have internal predecessors, (2787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:59,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:22:59,804 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-01-27 19:22:59,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-27 19:23:00,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:23:00,010 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:23:00,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:23:00,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1266609288, now seen corresponding path program 2 times [2023-01-27 19:23:00,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:23:00,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484920195] [2023-01-27 19:23:00,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:23:00,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:23:00,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:23:00,036 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:23:00,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:23:00,065 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:23:00,065 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:23:00,065 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-01-27 19:23:00,065 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-01-27 19:23:00,065 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-01-27 19:23:00,065 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-01-27 19:23:00,066 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-01-27 19:23:00,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-27 19:23:00,066 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2023-01-27 19:23:00,067 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:23:00,067 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-27 19:23:00,101 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-27 19:23:00,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 287 places, 339 transitions, 708 flow [2023-01-27 19:23:00,172 INFO L130 PetriNetUnfolder]: 110/628 cut-off events. [2023-01-27 19:23:00,172 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-01-27 19:23:00,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 628 events. 110/628 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2743 event pairs, 1 based on Foata normal form. 0/507 useless extension candidates. Maximal degree in co-relation 438. Up to 16 conditions per place. [2023-01-27 19:23:00,181 INFO L82 GeneralOperation]: Start removeDead. Operand has 287 places, 339 transitions, 708 flow [2023-01-27 19:23:00,186 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 287 places, 339 transitions, 708 flow [2023-01-27 19:23:00,187 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:23:00,187 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 287 places, 339 transitions, 708 flow [2023-01-27 19:23:00,187 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 287 places, 339 transitions, 708 flow [2023-01-27 19:23:00,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 287 places, 339 transitions, 708 flow [2023-01-27 19:23:00,251 INFO L130 PetriNetUnfolder]: 110/628 cut-off events. [2023-01-27 19:23:00,252 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-01-27 19:23:00,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 628 events. 110/628 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2743 event pairs, 1 based on Foata normal form. 0/507 useless extension candidates. Maximal degree in co-relation 438. Up to 16 conditions per place. [2023-01-27 19:23:00,288 INFO L119 LiptonReduction]: Number of co-enabled transitions 65604 [2023-01-27 19:23:03,315 INFO L134 LiptonReduction]: Checked pairs total: 110294 [2023-01-27 19:23:03,315 INFO L136 LiptonReduction]: Total number of compositions: 279 [2023-01-27 19:23:03,317 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:23:03,317 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;@20df05fa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:23:03,317 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-01-27 19:23:03,318 INFO L130 PetriNetUnfolder]: 8/30 cut-off events. [2023-01-27 19:23:03,318 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:23:03,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:23:03,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-27 19:23:03,318 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 19:23:03,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:23:03,319 INFO L85 PathProgramCache]: Analyzing trace with hash -408859945, now seen corresponding path program 1 times [2023-01-27 19:23:03,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:23:03,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495173256] [2023-01-27 19:23:03,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:23:03,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:23:03,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:23:03,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:23:03,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:23:03,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495173256] [2023-01-27 19:23:03,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495173256] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:23:03,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:23:03,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:23:03,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138350856] [2023-01-27 19:23:03,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:23:03,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:23:03,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:23:03,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:23:03,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:23:03,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 618 [2023-01-27 19:23:03,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 131 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 272.6666666666667) internal successors, (818), 3 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:03,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:23:03,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 618 [2023-01-27 19:23:03,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:23:19,942 INFO L130 PetriNetUnfolder]: 199024/283218 cut-off events. [2023-01-27 19:23:19,943 INFO L131 PetriNetUnfolder]: For 3132/3132 co-relation queries the response was YES. [2023-01-27 19:23:20,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 544637 conditions, 283218 events. 199024/283218 cut-off events. For 3132/3132 co-relation queries the response was YES. Maximal size of possible extension queue 7666. Compared 2271673 event pairs, 188343 based on Foata normal form. 51886/290674 useless extension candidates. Maximal degree in co-relation 50654. Up to 259483 conditions per place. [2023-01-27 19:23:21,530 INFO L137 encePairwiseOnDemand]: 573/618 looper letters, 69 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2023-01-27 19:23:21,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 90 transitions, 352 flow [2023-01-27 19:23:21,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:23:21,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:23:21,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 927 transitions. [2023-01-27 19:23:21,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-01-27 19:23:21,533 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 927 transitions. [2023-01-27 19:23:21,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 927 transitions. [2023-01-27 19:23:21,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:23:21,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 927 transitions. [2023-01-27 19:23:21,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 309.0) internal successors, (927), 3 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:21,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 618.0) internal successors, (2472), 4 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:21,537 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 618.0) internal successors, (2472), 4 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:21,537 INFO L175 Difference]: Start difference. First operand has 88 places, 131 transitions, 292 flow. Second operand 3 states and 927 transitions. [2023-01-27 19:23:21,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 90 transitions, 352 flow [2023-01-27 19:23:21,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 90 transitions, 352 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:23:21,540 INFO L231 Difference]: Finished difference. Result has 91 places, 90 transitions, 220 flow [2023-01-27 19:23:21,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=618, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=91, PETRI_TRANSITIONS=90} [2023-01-27 19:23:21,541 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 3 predicate places. [2023-01-27 19:23:21,541 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 90 transitions, 220 flow [2023-01-27 19:23:21,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 272.6666666666667) internal successors, (818), 3 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:21,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:23:21,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:23:21,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-27 19:23:21,541 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 19:23:21,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:23:21,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1114893743, now seen corresponding path program 1 times [2023-01-27 19:23:21,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:23:21,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818076737] [2023-01-27 19:23:21,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:23:21,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:23:21,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:23:21,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:23:21,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:23:21,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818076737] [2023-01-27 19:23:21,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818076737] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:23:21,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212097749] [2023-01-27 19:23:21,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:23:21,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:23:21,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:23:21,578 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) [2023-01-27 19:23:21,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-27 19:23:21,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:23:21,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 2 conjunts are in the unsatisfiable core [2023-01-27 19:23:21,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:23:21,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 19:23:21,647 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 19:23:21,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212097749] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:23:21,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 19:23:21,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-01-27 19:23:21,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925677995] [2023-01-27 19:23:21,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:23:21,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:23:21,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:23:21,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:23:21,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 19:23:21,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 618 [2023-01-27 19:23:21,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 90 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:21,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:23:21,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 618 [2023-01-27 19:23:21,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:23:36,825 INFO L130 PetriNetUnfolder]: 199267/282410 cut-off events. [2023-01-27 19:23:36,826 INFO L131 PetriNetUnfolder]: For 3094/3094 co-relation queries the response was YES. [2023-01-27 19:23:37,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543876 conditions, 282410 events. 199267/282410 cut-off events. For 3094/3094 co-relation queries the response was YES. Maximal size of possible extension queue 7617. Compared 2244922 event pairs, 123187 based on Foata normal form. 0/238132 useless extension candidates. Maximal degree in co-relation 543862. Up to 259453 conditions per place. [2023-01-27 19:23:38,298 INFO L137 encePairwiseOnDemand]: 615/618 looper letters, 85 selfloop transitions, 2 changer transitions 0/106 dead transitions. [2023-01-27 19:23:38,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 106 transitions, 426 flow [2023-01-27 19:23:38,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:23:38,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:23:38,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 900 transitions. [2023-01-27 19:23:38,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4854368932038835 [2023-01-27 19:23:38,300 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 900 transitions. [2023-01-27 19:23:38,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 900 transitions. [2023-01-27 19:23:38,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:23:38,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 900 transitions. [2023-01-27 19:23:38,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 300.0) internal successors, (900), 3 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:38,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 618.0) internal successors, (2472), 4 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:38,304 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 618.0) internal successors, (2472), 4 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:38,304 INFO L175 Difference]: Start difference. First operand has 91 places, 90 transitions, 220 flow. Second operand 3 states and 900 transitions. [2023-01-27 19:23:38,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 106 transitions, 426 flow [2023-01-27 19:23:38,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 106 transitions, 422 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 19:23:38,306 INFO L231 Difference]: Finished difference. Result has 93 places, 91 transitions, 228 flow [2023-01-27 19:23:38,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=618, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=93, PETRI_TRANSITIONS=91} [2023-01-27 19:23:38,306 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 5 predicate places. [2023-01-27 19:23:38,307 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 91 transitions, 228 flow [2023-01-27 19:23:38,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:38,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:23:38,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:23:38,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-27 19:23:38,511 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,SelfDestructingSolverStorable12 [2023-01-27 19:23:38,511 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 19:23:38,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:23:38,512 INFO L85 PathProgramCache]: Analyzing trace with hash 2018648220, now seen corresponding path program 1 times [2023-01-27 19:23:38,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:23:38,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356711620] [2023-01-27 19:23:38,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:23:38,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:23:38,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:23:38,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:23:38,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:23:38,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356711620] [2023-01-27 19:23:38,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356711620] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:23:38,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760775652] [2023-01-27 19:23:38,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:23:38,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:23:38,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:23:38,545 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) [2023-01-27 19:23:38,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-27 19:23:38,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:23:38,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:23:38,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:23:38,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:23:38,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:23:38,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:23:38,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760775652] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:23:38,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:23:38,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:23:38,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403154678] [2023-01-27 19:23:38,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:23:38,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:23:38,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:23:38,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:23:38,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:23:38,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 618 [2023-01-27 19:23:38,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 91 transitions, 228 flow. Second operand has 7 states, 7 states have (on average 272.85714285714283) internal successors, (1910), 7 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:38,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:23:38,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 618 [2023-01-27 19:23:38,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:23:55,069 INFO L130 PetriNetUnfolder]: 200915/283582 cut-off events. [2023-01-27 19:23:55,069 INFO L131 PetriNetUnfolder]: For 10256/10256 co-relation queries the response was YES. [2023-01-27 19:23:55,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 552245 conditions, 283582 events. 200915/283582 cut-off events. For 10256/10256 co-relation queries the response was YES. Maximal size of possible extension queue 7563. Compared 2231185 event pairs, 188343 based on Foata normal form. 3/242695 useless extension candidates. Maximal degree in co-relation 552216. Up to 259469 conditions per place. [2023-01-27 19:23:56,910 INFO L137 encePairwiseOnDemand]: 615/618 looper letters, 70 selfloop transitions, 5 changer transitions 0/94 dead transitions. [2023-01-27 19:23:56,911 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 94 transitions, 390 flow [2023-01-27 19:23:56,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:23:56,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:23:56,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1703 transitions. [2023-01-27 19:23:56,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45927723840345197 [2023-01-27 19:23:56,914 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1703 transitions. [2023-01-27 19:23:56,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1703 transitions. [2023-01-27 19:23:56,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:23:56,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1703 transitions. [2023-01-27 19:23:56,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 283.8333333333333) internal successors, (1703), 6 states have internal predecessors, (1703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:56,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 618.0) internal successors, (4326), 7 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:56,921 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 618.0) internal successors, (4326), 7 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:56,921 INFO L175 Difference]: Start difference. First operand has 93 places, 91 transitions, 228 flow. Second operand 6 states and 1703 transitions. [2023-01-27 19:23:56,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 94 transitions, 390 flow [2023-01-27 19:23:56,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 94 transitions, 388 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 19:23:56,929 INFO L231 Difference]: Finished difference. Result has 100 places, 94 transitions, 262 flow [2023-01-27 19:23:56,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=618, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=100, PETRI_TRANSITIONS=94} [2023-01-27 19:23:56,929 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 12 predicate places. [2023-01-27 19:23:56,929 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 94 transitions, 262 flow [2023-01-27 19:23:56,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 272.85714285714283) internal successors, (1910), 7 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:56,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:23:56,930 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:23:56,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-01-27 19:23:57,134 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,SelfDestructingSolverStorable13 [2023-01-27 19:23:57,135 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 19:23:57,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:23:57,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1180385758, now seen corresponding path program 2 times [2023-01-27 19:23:57,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:23:57,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136398660] [2023-01-27 19:23:57,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:23:57,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:23:57,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:23:57,196 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:23:57,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:23:57,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136398660] [2023-01-27 19:23:57,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136398660] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:23:57,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547153280] [2023-01-27 19:23:57,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 19:23:57,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:23:57,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:23:57,221 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) [2023-01-27 19:23:57,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-27 19:23:57,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-27 19:23:57,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:23:57,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 24 conjunts are in the unsatisfiable core [2023-01-27 19:23:57,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:23:57,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-01-27 19:23:57,375 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 19:23:57,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-27 19:23:57,389 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 13 treesize of output 15 [2023-01-27 19:23:57,436 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-27 19:23:57,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 19:23:57,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547153280] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:23:57,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 19:23:57,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-01-27 19:23:57,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201503899] [2023-01-27 19:23:57,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:23:57,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 19:23:57,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:23:57,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 19:23:57,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-01-27 19:23:57,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 618 [2023-01-27 19:23:57,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 94 transitions, 262 flow. Second operand has 6 states, 6 states have (on average 231.33333333333334) internal successors, (1388), 6 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:57,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:23:57,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 618 [2023-01-27 19:23:57,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:24:18,867 INFO L130 PetriNetUnfolder]: 266873/374148 cut-off events. [2023-01-27 19:24:18,868 INFO L131 PetriNetUnfolder]: For 13301/13301 co-relation queries the response was YES. [2023-01-27 19:24:19,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 738206 conditions, 374148 events. 266873/374148 cut-off events. For 13301/13301 co-relation queries the response was YES. Maximal size of possible extension queue 9694. Compared 2982164 event pairs, 52313 based on Foata normal form. 0/327062 useless extension candidates. Maximal degree in co-relation 738169. Up to 299648 conditions per place. [2023-01-27 19:24:21,284 INFO L137 encePairwiseOnDemand]: 608/618 looper letters, 202 selfloop transitions, 18 changer transitions 0/235 dead transitions. [2023-01-27 19:24:21,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 235 transitions, 1035 flow [2023-01-27 19:24:21,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:24:21,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:24:21,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1597 transitions. [2023-01-27 19:24:21,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4306903991370011 [2023-01-27 19:24:21,317 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1597 transitions. [2023-01-27 19:24:21,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1597 transitions. [2023-01-27 19:24:21,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:24:21,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1597 transitions. [2023-01-27 19:24:21,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 266.1666666666667) internal successors, (1597), 6 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:24:21,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 618.0) internal successors, (4326), 7 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:24:21,323 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 618.0) internal successors, (4326), 7 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:24:21,323 INFO L175 Difference]: Start difference. First operand has 100 places, 94 transitions, 262 flow. Second operand 6 states and 1597 transitions. [2023-01-27 19:24:21,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 235 transitions, 1035 flow [2023-01-27 19:24:21,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 235 transitions, 1021 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-27 19:24:21,331 INFO L231 Difference]: Finished difference. Result has 107 places, 110 transitions, 353 flow [2023-01-27 19:24:21,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=618, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=353, PETRI_PLACES=107, PETRI_TRANSITIONS=110} [2023-01-27 19:24:21,337 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 19 predicate places. [2023-01-27 19:24:21,337 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 110 transitions, 353 flow [2023-01-27 19:24:21,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 231.33333333333334) internal successors, (1388), 6 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:24:21,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:24:21,337 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:24:21,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-27 19:24:21,538 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,SelfDestructingSolverStorable14 [2023-01-27 19:24:21,538 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 19:24:21,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:24:21,538 INFO L85 PathProgramCache]: Analyzing trace with hash -2134507150, now seen corresponding path program 1 times [2023-01-27 19:24:21,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:24:21,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071394236] [2023-01-27 19:24:21,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:24:21,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:24:21,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:24:21,653 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:24:21,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:24:21,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071394236] [2023-01-27 19:24:21,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071394236] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:24:21,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827846460] [2023-01-27 19:24:21,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:24:21,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:24:21,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:24:21,673 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) [2023-01-27 19:24:21,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-27 19:24:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:24:21,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 19:24:21,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:24:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:24:21,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:24:21,895 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:24:21,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827846460] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:24:21,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:24:21,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-27 19:24:21,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924627797] [2023-01-27 19:24:21,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:24:21,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-27 19:24:21,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:24:21,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-27 19:24:21,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-01-27 19:24:21,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 618 [2023-01-27 19:24:21,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 110 transitions, 353 flow. Second operand has 13 states, 13 states have (on average 272.6923076923077) internal successors, (3545), 13 states have internal predecessors, (3545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:24:21,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:24:21,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 618 [2023-01-27 19:24:21,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:24:41,876 INFO L130 PetriNetUnfolder]: 209221/299265 cut-off events. [2023-01-27 19:24:41,876 INFO L131 PetriNetUnfolder]: For 59030/59396 co-relation queries the response was YES. [2023-01-27 19:24:42,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 634595 conditions, 299265 events. 209221/299265 cut-off events. For 59030/59396 co-relation queries the response was YES. Maximal size of possible extension queue 8582. Compared 2444026 event pairs, 186204 based on Foata normal form. 6/269726 useless extension candidates. Maximal degree in co-relation 634536. Up to 276698 conditions per place. [2023-01-27 19:24:44,057 INFO L137 encePairwiseOnDemand]: 615/618 looper letters, 86 selfloop transitions, 11 changer transitions 0/116 dead transitions. [2023-01-27 19:24:44,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 116 transitions, 583 flow [2023-01-27 19:24:44,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-27 19:24:44,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-27 19:24:44,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3338 transitions. [2023-01-27 19:24:44,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4501078748651564 [2023-01-27 19:24:44,076 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3338 transitions. [2023-01-27 19:24:44,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3338 transitions. [2023-01-27 19:24:44,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:24:44,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3338 transitions. [2023-01-27 19:24:44,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 278.1666666666667) internal successors, (3338), 12 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:24:44,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 618.0) internal successors, (8034), 13 states have internal predecessors, (8034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:24:44,086 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 618.0) internal successors, (8034), 13 states have internal predecessors, (8034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:24:44,086 INFO L175 Difference]: Start difference. First operand has 107 places, 110 transitions, 353 flow. Second operand 12 states and 3338 transitions. [2023-01-27 19:24:44,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 116 transitions, 583 flow [2023-01-27 19:24:44,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 116 transitions, 583 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:24:44,176 INFO L231 Difference]: Finished difference. Result has 124 places, 116 transitions, 437 flow [2023-01-27 19:24:44,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=618, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=437, PETRI_PLACES=124, PETRI_TRANSITIONS=116} [2023-01-27 19:24:44,178 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 36 predicate places. [2023-01-27 19:24:44,178 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 116 transitions, 437 flow [2023-01-27 19:24:44,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 272.6923076923077) internal successors, (3545), 13 states have internal predecessors, (3545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:24:44,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:24:44,179 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:24:44,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-27 19:24:44,388 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,SelfDestructingSolverStorable15 [2023-01-27 19:24:44,389 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 19:24:44,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:24:44,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1807626034, now seen corresponding path program 2 times [2023-01-27 19:24:44,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:24:44,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987380425] [2023-01-27 19:24:44,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:24:44,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:24:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:24:44,597 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-01-27 19:24:44,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:24:44,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987380425] [2023-01-27 19:24:44,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987380425] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:24:44,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907612147] [2023-01-27 19:24:44,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 19:24:44,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:24:44,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:24:44,613 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) [2023-01-27 19:24:44,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-27 19:24:44,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 19:24:44,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:24:44,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-27 19:24:44,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:24:44,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-01-27 19:24:44,783 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 19:24:44,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-27 19:24:44,797 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 13 treesize of output 15 [2023-01-27 19:24:44,812 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 13 treesize of output 15 [2023-01-27 19:24:44,838 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-01-27 19:24:44,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:24:56,936 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_432 (Array Int Int))) (= ((as const (Array Int Int)) 0) (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_432) |c_~#a~0.base|))) is different from false [2023-01-27 19:24:57,037 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-01-27 19:24:57,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907612147] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:24:57,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:24:57,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-01-27 19:24:57,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431631207] [2023-01-27 19:24:57,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:24:57,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 19:24:57,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:24:57,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 19:24:57,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=4, NotChecked=18, Total=132 [2023-01-27 19:24:57,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 618 [2023-01-27 19:24:57,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 116 transitions, 437 flow. Second operand has 12 states, 12 states have (on average 232.75) internal successors, (2793), 12 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:24:57,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:24:57,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 618 [2023-01-27 19:24:57,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:25:25,328 INFO L130 PetriNetUnfolder]: 297486/417691 cut-off events. [2023-01-27 19:25:25,329 INFO L131 PetriNetUnfolder]: For 75103/75103 co-relation queries the response was YES. [2023-01-27 19:25:27,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 889221 conditions, 417691 events. 297486/417691 cut-off events. For 75103/75103 co-relation queries the response was YES. Maximal size of possible extension queue 11185. Compared 3378293 event pairs, 57441 based on Foata normal form. 0/383378 useless extension candidates. Maximal degree in co-relation 889137. Up to 300065 conditions per place. [2023-01-27 19:25:28,956 INFO L137 encePairwiseOnDemand]: 604/618 looper letters, 250 selfloop transitions, 36 changer transitions 0/301 dead transitions. [2023-01-27 19:25:28,956 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 301 transitions, 1498 flow [2023-01-27 19:25:28,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 19:25:28,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 19:25:28,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1876 transitions. [2023-01-27 19:25:28,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4336569579288026 [2023-01-27 19:25:28,960 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1876 transitions. [2023-01-27 19:25:28,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1876 transitions. [2023-01-27 19:25:28,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:25:28,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1876 transitions. [2023-01-27 19:25:28,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 268.0) internal successors, (1876), 7 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:25:28,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 618.0) internal successors, (4944), 8 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:25:28,966 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 618.0) internal successors, (4944), 8 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:25:28,966 INFO L175 Difference]: Start difference. First operand has 124 places, 116 transitions, 437 flow. Second operand 7 states and 1876 transitions. [2023-01-27 19:25:28,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 301 transitions, 1498 flow [2023-01-27 19:25:29,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 301 transitions, 1450 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-01-27 19:25:29,260 INFO L231 Difference]: Finished difference. Result has 129 places, 136 transitions, 614 flow [2023-01-27 19:25:29,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=618, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=614, PETRI_PLACES=129, PETRI_TRANSITIONS=136} [2023-01-27 19:25:29,262 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 41 predicate places. [2023-01-27 19:25:29,262 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 136 transitions, 614 flow [2023-01-27 19:25:29,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 232.75) internal successors, (2793), 12 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:25:29,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:25:29,263 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-01-27 19:25:29,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-27 19:25:29,463 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,SelfDestructingSolverStorable16 [2023-01-27 19:25:29,464 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 19:25:29,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:25:29,464 INFO L85 PathProgramCache]: Analyzing trace with hash 2036537415, now seen corresponding path program 1 times [2023-01-27 19:25:29,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:25:29,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213458715] [2023-01-27 19:25:29,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:25:29,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:25:29,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:25:29,485 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:25:29,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:25:29,554 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:25:29,554 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:25:29,555 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-01-27 19:25:29,555 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-01-27 19:25:29,555 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-01-27 19:25:29,555 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-01-27 19:25:29,555 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-01-27 19:25:29,555 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-01-27 19:25:29,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-01-27 19:25:29,555 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2023-01-27 19:25:29,556 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:25:29,556 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-27 19:25:29,599 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-27 19:25:29,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 348 places, 412 transitions, 868 flow [2023-01-27 19:25:29,816 INFO L130 PetriNetUnfolder]: 157/890 cut-off events. [2023-01-27 19:25:29,817 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-01-27 19:25:29,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 945 conditions, 890 events. 157/890 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4207 event pairs, 6 based on Foata normal form. 0/724 useless extension candidates. Maximal degree in co-relation 648. Up to 32 conditions per place. [2023-01-27 19:25:29,849 INFO L82 GeneralOperation]: Start removeDead. Operand has 348 places, 412 transitions, 868 flow [2023-01-27 19:25:29,872 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 348 places, 412 transitions, 868 flow [2023-01-27 19:25:29,872 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:25:29,872 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 348 places, 412 transitions, 868 flow [2023-01-27 19:25:29,872 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 348 places, 412 transitions, 868 flow [2023-01-27 19:25:29,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 348 places, 412 transitions, 868 flow [2023-01-27 19:25:30,017 INFO L130 PetriNetUnfolder]: 157/890 cut-off events. [2023-01-27 19:25:30,017 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-01-27 19:25:30,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 945 conditions, 890 events. 157/890 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4207 event pairs, 6 based on Foata normal form. 0/724 useless extension candidates. Maximal degree in co-relation 648. Up to 32 conditions per place. [2023-01-27 19:25:30,131 INFO L119 LiptonReduction]: Number of co-enabled transitions 108488 [2023-01-27 19:25:34,185 INFO L134 LiptonReduction]: Checked pairs total: 188751 [2023-01-27 19:25:34,185 INFO L136 LiptonReduction]: Total number of compositions: 337 [2023-01-27 19:25:34,187 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:25:34,188 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;@20df05fa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:25:34,188 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-01-27 19:25:34,189 INFO L130 PetriNetUnfolder]: 8/30 cut-off events. [2023-01-27 19:25:34,190 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:25:34,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:25:34,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-27 19:25:34,190 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-01-27 19:25:34,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:25:34,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1929788073, now seen corresponding path program 1 times [2023-01-27 19:25:34,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:25:34,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349863873] [2023-01-27 19:25:34,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:25:34,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:25:34,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:25:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:25:34,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:25:34,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349863873] [2023-01-27 19:25:34,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349863873] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:25:34,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:25:34,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:25:34,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070252239] [2023-01-27 19:25:34,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:25:34,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:25:34,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:25:34,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:25:34,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:25:34,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 749 [2023-01-27 19:25:34,223 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 161 transitions, 366 flow. Second operand has 3 states, 3 states have (on average 330.6666666666667) internal successors, (992), 3 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:25:34,223 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:25:34,223 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 749 [2023-01-27 19:25:34,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand