/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_60-invariant_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 19:18:05,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 19:18:05,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 19:18:05,500 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 19:18:05,501 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 19:18:05,503 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 19:18:05,506 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 19:18:05,508 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 19:18:05,510 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 19:18:05,514 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 19:18:05,515 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 19:18:05,516 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 19:18:05,517 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 19:18:05,519 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 19:18:05,520 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 19:18:05,521 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 19:18:05,522 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 19:18:05,522 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 19:18:05,524 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 19:18:05,528 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 19:18:05,529 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 19:18:05,530 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 19:18:05,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 19:18:05,532 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 19:18:05,540 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 19:18:05,547 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 19:18:05,547 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 19:18:05,548 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 19:18:05,549 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 19:18:05,574 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 19:18:05,574 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 19:18:05,575 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 19:18:05,576 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 19:18:05,576 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 19:18:05,577 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 19:18:05,577 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 19:18:05,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 19:18:05,577 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 19:18:05,577 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 19:18:05,578 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 19:18:05,578 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 19:18:05,578 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 19:18:05,578 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 19:18:05,579 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 19:18:05,579 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 19:18:05,579 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 19:18:05,579 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 19:18:05,579 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 19:18:05,579 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 19:18:05,580 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 19:18:05,580 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 19:18:05,580 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 19:18:05,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:18:05,580 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 19:18:05,580 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 19:18:05,580 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 19:18:05,581 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 19:18:05,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 19:18:05,581 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 19:18:05,581 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 19:18:05,581 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 19:18:05,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 19:18:05,792 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 19:18:05,794 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 19:18:05,795 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 19:18:05,796 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 19:18:05,796 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_60-invariant_racefree.i [2023-01-27 19:18:06,930 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 19:18:07,187 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 19:18:07,187 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_60-invariant_racefree.i [2023-01-27 19:18:07,208 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45dbd2e14/99983219ea9d41cda960930a332c80fd/FLAGad51f411c [2023-01-27 19:18:07,229 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45dbd2e14/99983219ea9d41cda960930a332c80fd [2023-01-27 19:18:07,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 19:18:07,233 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 19:18:07,235 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 19:18:07,235 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 19:18:07,238 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 19:18:07,238 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:18:07" (1/1) ... [2023-01-27 19:18:07,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f48195 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:18:07, skipping insertion in model container [2023-01-27 19:18:07,239 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:18:07" (1/1) ... [2023-01-27 19:18:07,245 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 19:18:07,282 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 19:18:07,554 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_60-invariant_racefree.i[30176,30189] [2023-01-27 19:18:07,585 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:18:07,599 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 19:18:07,646 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_60-invariant_racefree.i[30176,30189] [2023-01-27 19:18:07,661 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:18:07,698 INFO L208 MainTranslator]: Completed translation [2023-01-27 19:18:07,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:18:07 WrapperNode [2023-01-27 19:18:07,699 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 19:18:07,701 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 19:18:07,701 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 19:18:07,701 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 19:18:07,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:18:07" (1/1) ... [2023-01-27 19:18:07,727 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:18:07" (1/1) ... [2023-01-27 19:18:07,748 INFO L138 Inliner]: procedures = 170, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 141 [2023-01-27 19:18:07,748 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 19:18:07,749 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 19:18:07,749 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 19:18:07,749 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 19:18:07,757 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:18:07" (1/1) ... [2023-01-27 19:18:07,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:18:07" (1/1) ... [2023-01-27 19:18:07,760 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:18:07" (1/1) ... [2023-01-27 19:18:07,760 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:18:07" (1/1) ... [2023-01-27 19:18:07,765 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:18:07" (1/1) ... [2023-01-27 19:18:07,769 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:18:07" (1/1) ... [2023-01-27 19:18:07,771 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:18:07" (1/1) ... [2023-01-27 19:18:07,772 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:18:07" (1/1) ... [2023-01-27 19:18:07,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 19:18:07,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 19:18:07,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 19:18:07,777 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 19:18:07,778 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:18:07" (1/1) ... [2023-01-27 19:18:07,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:18:07,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:18:07,816 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 19:18:07,831 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 19:18:07,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 19:18:07,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 19:18:07,859 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-27 19:18:07,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 19:18:07,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 19:18:07,859 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-27 19:18:07,859 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-27 19:18:07,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 19:18:07,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 19:18:07,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 19:18:07,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 19:18:07,862 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 19:18:07,997 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 19:18:07,999 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 19:18:08,181 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 19:18:08,189 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 19:18:08,189 INFO L302 CfgBuilder]: Removed 18 assume(true) statements. [2023-01-27 19:18:08,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:18:08 BoogieIcfgContainer [2023-01-27 19:18:08,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 19:18:08,193 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 19:18:08,193 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 19:18:08,196 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 19:18:08,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 07:18:07" (1/3) ... [2023-01-27 19:18:08,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@471f075c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:18:08, skipping insertion in model container [2023-01-27 19:18:08,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:18:07" (2/3) ... [2023-01-27 19:18:08,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@471f075c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:18:08, skipping insertion in model container [2023-01-27 19:18:08,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:18:08" (3/3) ... [2023-01-27 19:18:08,198 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_60-invariant_racefree.i [2023-01-27 19:18:08,217 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 19:18:08,217 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-01-27 19:18:08,218 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 19:18:08,291 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-27 19:18:08,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 138 transitions, 284 flow [2023-01-27 19:18:08,403 INFO L130 PetriNetUnfolder]: 33/193 cut-off events. [2023-01-27 19:18:08,404 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 19:18:08,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 193 events. 33/193 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 633 event pairs, 0 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 105. Up to 6 conditions per place. [2023-01-27 19:18:08,412 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 138 transitions, 284 flow [2023-01-27 19:18:08,417 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 133 transitions, 271 flow [2023-01-27 19:18:08,420 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:18:08,427 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 133 transitions, 271 flow [2023-01-27 19:18:08,430 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 133 transitions, 271 flow [2023-01-27 19:18:08,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 133 transitions, 271 flow [2023-01-27 19:18:08,534 INFO L130 PetriNetUnfolder]: 32/188 cut-off events. [2023-01-27 19:18:08,534 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:18:08,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 188 events. 32/188 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 619 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 105. Up to 6 conditions per place. [2023-01-27 19:18:08,538 INFO L119 LiptonReduction]: Number of co-enabled transitions 5490 [2023-01-27 19:18:10,736 INFO L134 LiptonReduction]: Checked pairs total: 14551 [2023-01-27 19:18:10,736 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-01-27 19:18:10,749 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:18:10,754 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;@15038d3b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:18:10,755 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-27 19:18:10,758 INFO L130 PetriNetUnfolder]: 1/16 cut-off events. [2023-01-27 19:18:10,759 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:18:10,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:18:10,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-27 19:18:10,760 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 19:18:10,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:18:10,764 INFO L85 PathProgramCache]: Analyzing trace with hash 512707676, now seen corresponding path program 1 times [2023-01-27 19:18:10,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:18:10,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673162055] [2023-01-27 19:18:10,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:18:10,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:18:10,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:18:10,986 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 19:18:10,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:18:10,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673162055] [2023-01-27 19:18:10,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673162055] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:18:10,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:18:10,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:18:10,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526100267] [2023-01-27 19:18:10,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:18:10,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:18:11,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:18:11,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:18:11,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:18:11,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 235 [2023-01-27 19:18:11,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 62 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 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 19:18:11,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:18:11,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 235 [2023-01-27 19:18:11,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:18:11,170 INFO L130 PetriNetUnfolder]: 211/547 cut-off events. [2023-01-27 19:18:11,171 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:18:11,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1005 conditions, 547 events. 211/547 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2758 event pairs, 0 based on Foata normal form. 88/558 useless extension candidates. Maximal degree in co-relation 964. Up to 421 conditions per place. [2023-01-27 19:18:11,175 INFO L137 encePairwiseOnDemand]: 213/235 looper letters, 45 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-01-27 19:18:11,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 58 transitions, 215 flow [2023-01-27 19:18:11,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:18:11,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:18:11,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 397 transitions. [2023-01-27 19:18:11,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5631205673758866 [2023-01-27 19:18:11,188 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 397 transitions. [2023-01-27 19:18:11,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 397 transitions. [2023-01-27 19:18:11,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:18:11,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 397 transitions. [2023-01-27 19:18:11,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 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 19:18:11,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 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 19:18:11,199 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 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 19:18:11,200 INFO L175 Difference]: Start difference. First operand has 46 places, 62 transitions, 129 flow. Second operand 3 states and 397 transitions. [2023-01-27 19:18:11,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 58 transitions, 215 flow [2023-01-27 19:18:11,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 58 transitions, 215 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:18:11,204 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 97 flow [2023-01-27 19:18:11,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-01-27 19:18:11,208 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 1 predicate places. [2023-01-27 19:18:11,209 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 97 flow [2023-01-27 19:18:11,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 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 19:18:11,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:18:11,209 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-27 19:18:11,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 19:18:11,210 INFO L420 AbstractCegarLoop]: === Iteration 2 === 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 19:18:11,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:18:11,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1289063369, now seen corresponding path program 1 times [2023-01-27 19:18:11,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:18:11,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125487376] [2023-01-27 19:18:11,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:18:11,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:18:11,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:18:11,235 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:18:11,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:18:11,262 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:18:11,263 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:18:11,264 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-01-27 19:18:11,265 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-01-27 19:18:11,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-01-27 19:18:11,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-01-27 19:18:11,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 19:18:11,266 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 19:18:11,269 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:18:11,269 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-27 19:18:11,290 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 19:18:11,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 185 transitions, 388 flow [2023-01-27 19:18:11,330 INFO L130 PetriNetUnfolder]: 57/319 cut-off events. [2023-01-27 19:18:11,331 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-27 19:18:11,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333 conditions, 319 events. 57/319 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1201 event pairs, 0 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 195. Up to 9 conditions per place. [2023-01-27 19:18:11,333 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 185 transitions, 388 flow [2023-01-27 19:18:11,335 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 185 transitions, 388 flow [2023-01-27 19:18:11,336 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:18:11,336 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 157 places, 185 transitions, 388 flow [2023-01-27 19:18:11,336 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 157 places, 185 transitions, 388 flow [2023-01-27 19:18:11,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 185 transitions, 388 flow [2023-01-27 19:18:11,365 INFO L130 PetriNetUnfolder]: 57/319 cut-off events. [2023-01-27 19:18:11,365 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-27 19:18:11,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333 conditions, 319 events. 57/319 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1201 event pairs, 0 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 195. Up to 9 conditions per place. [2023-01-27 19:18:11,374 INFO L119 LiptonReduction]: Number of co-enabled transitions 16020 [2023-01-27 19:18:13,634 INFO L134 LiptonReduction]: Checked pairs total: 45797 [2023-01-27 19:18:13,634 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-01-27 19:18:13,637 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:18:13,638 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;@15038d3b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:18:13,638 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-27 19:18:13,640 INFO L130 PetriNetUnfolder]: 1/16 cut-off events. [2023-01-27 19:18:13,640 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:18:13,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:18:13,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-27 19:18:13,640 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 19:18:13,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:18:13,641 INFO L85 PathProgramCache]: Analyzing trace with hash 853260580, now seen corresponding path program 1 times [2023-01-27 19:18:13,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:18:13,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396011645] [2023-01-27 19:18:13,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:18:13,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:18:13,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:18:13,687 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 19:18:13,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:18:13,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396011645] [2023-01-27 19:18:13,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396011645] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:18:13,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:18:13,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:18:13,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737198501] [2023-01-27 19:18:13,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:18:13,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:18:13,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:18:13,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:18:13,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:18:13,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 310 [2023-01-27 19:18:13,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 95 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 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 19:18:13,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:18:13,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 310 [2023-01-27 19:18:13,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:18:14,362 INFO L130 PetriNetUnfolder]: 5106/8979 cut-off events. [2023-01-27 19:18:14,363 INFO L131 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2023-01-27 19:18:14,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16936 conditions, 8979 events. 5106/8979 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 67671 event pairs, 2208 based on Foata normal form. 1727/9079 useless extension candidates. Maximal degree in co-relation 2572. Up to 7850 conditions per place. [2023-01-27 19:18:14,407 INFO L137 encePairwiseOnDemand]: 281/310 looper letters, 58 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-01-27 19:18:14,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 83 transitions, 304 flow [2023-01-27 19:18:14,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:18:14,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:18:14,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 522 transitions. [2023-01-27 19:18:14,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612903225806452 [2023-01-27 19:18:14,411 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 522 transitions. [2023-01-27 19:18:14,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 522 transitions. [2023-01-27 19:18:14,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:18:14,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 522 transitions. [2023-01-27 19:18:14,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 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 19:18:14,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 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 19:18:14,416 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 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 19:18:14,416 INFO L175 Difference]: Start difference. First operand has 70 places, 95 transitions, 208 flow. Second operand 3 states and 522 transitions. [2023-01-27 19:18:14,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 83 transitions, 304 flow [2023-01-27 19:18:14,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 83 transitions, 304 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:18:14,419 INFO L231 Difference]: Finished difference. Result has 73 places, 70 transitions, 168 flow [2023-01-27 19:18:14,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=70, 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=73, PETRI_TRANSITIONS=70} [2023-01-27 19:18:14,420 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 3 predicate places. [2023-01-27 19:18:14,420 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 168 flow [2023-01-27 19:18:14,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 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 19:18:14,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:18:14,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:18:14,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 19:18:14,421 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:18:14,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:18:14,422 INFO L85 PathProgramCache]: Analyzing trace with hash -438786581, now seen corresponding path program 1 times [2023-01-27 19:18:14,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:18:14,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183608205] [2023-01-27 19:18:14,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:18:14,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:18:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:18:14,518 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 19:18:14,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:18:14,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183608205] [2023-01-27 19:18:14,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183608205] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:18:14,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:18:14,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 19:18:14,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516351134] [2023-01-27 19:18:14,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:18:14,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:18:14,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:18:14,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:18:14,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:18:14,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 310 [2023-01-27 19:18:14,521 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:18:14,521 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:18:14,521 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 310 [2023-01-27 19:18:14,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:18:15,657 INFO L130 PetriNetUnfolder]: 9204/15516 cut-off events. [2023-01-27 19:18:15,658 INFO L131 PetriNetUnfolder]: For 182/182 co-relation queries the response was YES. [2023-01-27 19:18:15,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30400 conditions, 15516 events. 9204/15516 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 115403 event pairs, 4766 based on Foata normal form. 0/13319 useless extension candidates. Maximal degree in co-relation 30354. Up to 10034 conditions per place. [2023-01-27 19:18:15,723 INFO L137 encePairwiseOnDemand]: 293/310 looper letters, 87 selfloop transitions, 10 changer transitions 0/110 dead transitions. [2023-01-27 19:18:15,724 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 110 transitions, 448 flow [2023-01-27 19:18:15,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:18:15,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:18:15,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2023-01-27 19:18:15,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5268817204301075 [2023-01-27 19:18:15,726 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2023-01-27 19:18:15,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2023-01-27 19:18:15,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:18:15,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2023-01-27 19:18:15,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 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 19:18:15,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 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 19:18:15,731 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 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 19:18:15,731 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 168 flow. Second operand 3 states and 490 transitions. [2023-01-27 19:18:15,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 110 transitions, 448 flow [2023-01-27 19:18:15,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 110 transitions, 446 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 19:18:15,737 INFO L231 Difference]: Finished difference. Result has 76 places, 78 transitions, 252 flow [2023-01-27 19:18:15,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=252, PETRI_PLACES=76, PETRI_TRANSITIONS=78} [2023-01-27 19:18:15,739 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 6 predicate places. [2023-01-27 19:18:15,739 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 78 transitions, 252 flow [2023-01-27 19:18:15,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:18:15,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:18:15,739 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-27 19:18:15,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 19:18:15,740 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 2 more)] === [2023-01-27 19:18:15,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:18:15,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1742642449, now seen corresponding path program 1 times [2023-01-27 19:18:15,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:18:15,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591596493] [2023-01-27 19:18:15,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:18:15,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:18:15,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:18:15,758 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:18:15,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:18:15,770 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:18:15,771 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:18:15,771 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-01-27 19:18:15,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-01-27 19:18:15,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-01-27 19:18:15,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-01-27 19:18:15,772 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-01-27 19:18:15,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 19:18:15,772 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 19:18:15,772 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:18:15,773 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-27 19:18:15,795 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-27 19:18:15,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 232 transitions, 494 flow [2023-01-27 19:18:15,845 INFO L130 PetriNetUnfolder]: 86/476 cut-off events. [2023-01-27 19:18:15,846 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-27 19:18:15,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504 conditions, 476 events. 86/476 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1887 event pairs, 1 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 327. Up to 16 conditions per place. [2023-01-27 19:18:15,849 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 232 transitions, 494 flow [2023-01-27 19:18:15,852 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 232 transitions, 494 flow [2023-01-27 19:18:15,852 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:18:15,852 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 195 places, 232 transitions, 494 flow [2023-01-27 19:18:15,853 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 195 places, 232 transitions, 494 flow [2023-01-27 19:18:15,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 232 transitions, 494 flow [2023-01-27 19:18:15,898 INFO L130 PetriNetUnfolder]: 86/476 cut-off events. [2023-01-27 19:18:15,899 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-27 19:18:15,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504 conditions, 476 events. 86/476 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1887 event pairs, 1 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 327. Up to 16 conditions per place. [2023-01-27 19:18:15,919 INFO L119 LiptonReduction]: Number of co-enabled transitions 30510 [2023-01-27 19:18:18,268 INFO L134 LiptonReduction]: Checked pairs total: 92115 [2023-01-27 19:18:18,268 INFO L136 LiptonReduction]: Total number of compositions: 157 [2023-01-27 19:18:18,270 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:18:18,271 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;@15038d3b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:18:18,271 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-01-27 19:18:18,273 INFO L130 PetriNetUnfolder]: 1/16 cut-off events. [2023-01-27 19:18:18,273 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:18:18,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:18:18,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-27 19:18:18,273 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 19:18:18,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:18:18,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1269110236, now seen corresponding path program 1 times [2023-01-27 19:18:18,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:18:18,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763266052] [2023-01-27 19:18:18,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:18:18,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:18:18,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:18:18,299 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 19:18:18,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:18:18,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763266052] [2023-01-27 19:18:18,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763266052] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:18:18,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:18:18,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:18:18,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137529801] [2023-01-27 19:18:18,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:18:18,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:18:18,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:18:18,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:18:18,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:18:18,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 389 [2023-01-27 19:18:18,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 124 transitions, 278 flow. Second operand has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 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 19:18:18,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:18:18,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 389 [2023-01-27 19:18:18,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:18:27,178 INFO L130 PetriNetUnfolder]: 95946/144583 cut-off events. [2023-01-27 19:18:27,178 INFO L131 PetriNetUnfolder]: For 1715/1715 co-relation queries the response was YES. [2023-01-27 19:18:27,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276062 conditions, 144583 events. 95946/144583 cut-off events. For 1715/1715 co-relation queries the response was YES. Maximal size of possible extension queue 4007. Compared 1228782 event pairs, 56969 based on Foata normal form. 22989/145036 useless extension candidates. Maximal degree in co-relation 18306. Up to 130015 conditions per place. [2023-01-27 19:18:28,103 INFO L137 encePairwiseOnDemand]: 352/389 looper letters, 73 selfloop transitions, 2 changer transitions 0/105 dead transitions. [2023-01-27 19:18:28,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 105 transitions, 390 flow [2023-01-27 19:18:28,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:18:28,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:18:28,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 649 transitions. [2023-01-27 19:18:28,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5561268209083119 [2023-01-27 19:18:28,106 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 649 transitions. [2023-01-27 19:18:28,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 649 transitions. [2023-01-27 19:18:28,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:18:28,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 649 transitions. [2023-01-27 19:18:28,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.33333333333334) internal successors, (649), 3 states have internal predecessors, (649), 0 states have call successors, (0), 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 19:18:28,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 389.0) internal successors, (1556), 4 states have internal predecessors, (1556), 0 states have call successors, (0), 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 19:18:28,111 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 389.0) internal successors, (1556), 4 states have internal predecessors, (1556), 0 states have call successors, (0), 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 19:18:28,111 INFO L175 Difference]: Start difference. First operand has 91 places, 124 transitions, 278 flow. Second operand 3 states and 649 transitions. [2023-01-27 19:18:28,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 105 transitions, 390 flow [2023-01-27 19:18:28,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 105 transitions, 390 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:18:28,117 INFO L231 Difference]: Finished difference. Result has 94 places, 91 transitions, 222 flow [2023-01-27 19:18:28,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=91, 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=222, PETRI_PLACES=94, PETRI_TRANSITIONS=91} [2023-01-27 19:18:28,120 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, 3 predicate places. [2023-01-27 19:18:28,121 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 91 transitions, 222 flow [2023-01-27 19:18:28,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 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 19:18:28,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:18:28,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:18:28,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 19:18:28,122 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 19:18:28,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:18:28,123 INFO L85 PathProgramCache]: Analyzing trace with hash -195613165, now seen corresponding path program 1 times [2023-01-27 19:18:28,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:18:28,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942589288] [2023-01-27 19:18:28,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:18:28,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:18:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:18:28,191 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 19:18:28,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:18:28,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942589288] [2023-01-27 19:18:28,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942589288] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:18:28,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:18:28,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 19:18:28,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823610619] [2023-01-27 19:18:28,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:18:28,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:18:28,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:18:28,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:18:28,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:18:28,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 389 [2023-01-27 19:18:28,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 91 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 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 19:18:28,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:18:28,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 389 [2023-01-27 19:18:28,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:18:51,224 INFO L130 PetriNetUnfolder]: 293839/418810 cut-off events. [2023-01-27 19:18:51,224 INFO L131 PetriNetUnfolder]: For 4232/4232 co-relation queries the response was YES. [2023-01-27 19:18:51,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 829297 conditions, 418810 events. 293839/418810 cut-off events. For 4232/4232 co-relation queries the response was YES. Maximal size of possible extension queue 10425. Compared 3465339 event pairs, 134570 based on Foata normal form. 0/368918 useless extension candidates. Maximal degree in co-relation 829240. Up to 259359 conditions per place. [2023-01-27 19:18:52,841 INFO L137 encePairwiseOnDemand]: 368/389 looper letters, 122 selfloop transitions, 12 changer transitions 0/148 dead transitions. [2023-01-27 19:18:52,842 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 148 transitions, 613 flow [2023-01-27 19:18:52,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:18:52,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:18:52,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 613 transitions. [2023-01-27 19:18:52,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5252784918594687 [2023-01-27 19:18:52,852 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 613 transitions. [2023-01-27 19:18:52,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 613 transitions. [2023-01-27 19:18:52,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:18:52,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 613 transitions. [2023-01-27 19:18:52,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.33333333333334) internal successors, (613), 3 states have internal predecessors, (613), 0 states have call successors, (0), 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 19:18:52,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 389.0) internal successors, (1556), 4 states have internal predecessors, (1556), 0 states have call successors, (0), 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 19:18:52,857 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 389.0) internal successors, (1556), 4 states have internal predecessors, (1556), 0 states have call successors, (0), 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 19:18:52,857 INFO L175 Difference]: Start difference. First operand has 94 places, 91 transitions, 222 flow. Second operand 3 states and 613 transitions. [2023-01-27 19:18:52,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 148 transitions, 613 flow [2023-01-27 19:18:52,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 148 transitions, 611 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 19:18:52,872 INFO L231 Difference]: Finished difference. Result has 97 places, 101 transitions, 326 flow [2023-01-27 19:18:52,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=326, PETRI_PLACES=97, PETRI_TRANSITIONS=101} [2023-01-27 19:18:52,873 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, 6 predicate places. [2023-01-27 19:18:52,873 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 101 transitions, 326 flow [2023-01-27 19:18:52,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 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 19:18:52,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:18:52,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:18:52,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 19:18:52,874 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 19:18:52,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:18:52,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1785432912, now seen corresponding path program 1 times [2023-01-27 19:18:52,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:18:52,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468090001] [2023-01-27 19:18:52,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:18:52,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:18:52,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:18:52,931 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 19:18:52,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:18:52,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468090001] [2023-01-27 19:18:52,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468090001] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:18:52,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601934114] [2023-01-27 19:18:52,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:18:52,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:18:52,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:18:52,941 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 19:18:52,942 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 19:18:53,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:18:53,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:18:53,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:18:53,099 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 19:18:53,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:18:53,133 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 19:18:53,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601934114] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:18:53,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:18:53,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:18:53,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209504843] [2023-01-27 19:18:53,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:18:53,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:18:53,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:18:53,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:18:53,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:18:53,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 389 [2023-01-27 19:18:53,137 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 101 transitions, 326 flow. Second operand has 7 states, 7 states have (on average 179.71428571428572) internal successors, (1258), 7 states have internal predecessors, (1258), 0 states have call successors, (0), 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 19:18:53,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:18:53,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 389 [2023-01-27 19:18:53,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:18:53,409 INFO L130 PetriNetUnfolder]: 1986/3264 cut-off events. [2023-01-27 19:18:53,409 INFO L131 PetriNetUnfolder]: For 1204/1204 co-relation queries the response was YES. [2023-01-27 19:18:53,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7455 conditions, 3264 events. 1986/3264 cut-off events. For 1204/1204 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 18613 event pairs, 75 based on Foata normal form. 322/3540 useless extension candidates. Maximal degree in co-relation 7442. Up to 1932 conditions per place. [2023-01-27 19:18:53,425 INFO L137 encePairwiseOnDemand]: 386/389 looper letters, 52 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2023-01-27 19:18:53,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 61 transitions, 273 flow [2023-01-27 19:18:53,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:18:53,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:18:53,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1121 transitions. [2023-01-27 19:18:53,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48029134532990575 [2023-01-27 19:18:53,432 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1121 transitions. [2023-01-27 19:18:53,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1121 transitions. [2023-01-27 19:18:53,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:18:53,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1121 transitions. [2023-01-27 19:18:53,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 186.83333333333334) internal successors, (1121), 6 states have internal predecessors, (1121), 0 states have call successors, (0), 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 19:18:53,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 389.0) internal successors, (2723), 7 states have internal predecessors, (2723), 0 states have call successors, (0), 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 19:18:53,439 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 389.0) internal successors, (2723), 7 states have internal predecessors, (2723), 0 states have call successors, (0), 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 19:18:53,439 INFO L175 Difference]: Start difference. First operand has 97 places, 101 transitions, 326 flow. Second operand 6 states and 1121 transitions. [2023-01-27 19:18:53,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 61 transitions, 273 flow [2023-01-27 19:18:53,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 61 transitions, 265 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-01-27 19:18:53,443 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 95 flow [2023-01-27 19:18:53,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=95, PETRI_PLACES=42, PETRI_TRANSITIONS=28} [2023-01-27 19:18:53,444 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, -49 predicate places. [2023-01-27 19:18:53,444 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 95 flow [2023-01-27 19:18:53,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 179.71428571428572) internal successors, (1258), 7 states have internal predecessors, (1258), 0 states have call successors, (0), 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 19:18:53,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:18:53,445 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-27 19:18:53,457 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 19:18:53,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:18:53,646 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 3 more)] === [2023-01-27 19:18:53,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:18:53,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1971387787, now seen corresponding path program 1 times [2023-01-27 19:18:53,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:18:53,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132009611] [2023-01-27 19:18:53,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:18:53,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:18:53,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:18:53,663 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:18:53,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:18:53,691 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:18:53,691 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:18:53,691 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-01-27 19:18:53,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-01-27 19:18:53,692 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-01-27 19:18:53,692 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-01-27 19:18:53,692 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-01-27 19:18:53,692 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-01-27 19:18:53,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-27 19:18:53,692 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-01-27 19:18:53,693 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:18:53,694 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-27 19:18:53,729 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-27 19:18:53,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 233 places, 279 transitions, 602 flow [2023-01-27 19:18:53,986 INFO L130 PetriNetUnfolder]: 127/697 cut-off events. [2023-01-27 19:18:53,986 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-27 19:18:53,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 752 conditions, 697 events. 127/697 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2947 event pairs, 6 based on Foata normal form. 0/561 useless extension candidates. Maximal degree in co-relation 496. Up to 32 conditions per place. [2023-01-27 19:18:53,991 INFO L82 GeneralOperation]: Start removeDead. Operand has 233 places, 279 transitions, 602 flow [2023-01-27 19:18:53,995 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 233 places, 279 transitions, 602 flow [2023-01-27 19:18:53,995 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:18:53,995 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 233 places, 279 transitions, 602 flow [2023-01-27 19:18:53,996 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 233 places, 279 transitions, 602 flow [2023-01-27 19:18:53,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 233 places, 279 transitions, 602 flow [2023-01-27 19:18:54,065 INFO L130 PetriNetUnfolder]: 127/697 cut-off events. [2023-01-27 19:18:54,066 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-27 19:18:54,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 752 conditions, 697 events. 127/697 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2947 event pairs, 6 based on Foata normal form. 0/561 useless extension candidates. Maximal degree in co-relation 496. Up to 32 conditions per place. [2023-01-27 19:18:54,093 INFO L119 LiptonReduction]: Number of co-enabled transitions 49320 [2023-01-27 19:18:56,845 INFO L134 LiptonReduction]: Checked pairs total: 160952 [2023-01-27 19:18:56,845 INFO L136 LiptonReduction]: Total number of compositions: 188 [2023-01-27 19:18:56,846 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:18:56,847 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;@15038d3b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:18:56,847 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-01-27 19:18:56,848 INFO L130 PetriNetUnfolder]: 3/20 cut-off events. [2023-01-27 19:18:56,849 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:18:56,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:18:56,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-27 19:18:56,849 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 19:18:56,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:18:56,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1759257538, now seen corresponding path program 1 times [2023-01-27 19:18:56,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:18:56,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061909240] [2023-01-27 19:18:56,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:18:56,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:18:56,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:18:56,883 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 19:18:56,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:18:56,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061909240] [2023-01-27 19:18:56,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061909240] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:18:56,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:18:56,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:18:56,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856805410] [2023-01-27 19:18:56,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:18:56,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:18:56,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:18:56,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:18:56,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:18:56,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 467 [2023-01-27 19:18:56,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 159 transitions, 362 flow. Second operand has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 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 19:18:56,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:18:56,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 467 [2023-01-27 19:18:56,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand