/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-buffer-mult-alt2.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 02:44:16,444 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 02:44:16,489 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 02:44:16,491 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 02:44:16,492 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 02:44:16,492 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 02:44:16,492 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 02:44:16,504 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 02:44:16,505 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 02:44:16,505 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 02:44:16,505 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 02:44:16,506 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 02:44:16,506 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 02:44:16,506 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 02:44:16,506 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 02:44:16,507 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 02:44:16,507 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 02:44:16,507 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 02:44:16,507 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 02:44:16,507 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 02:44:16,507 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 02:44:16,508 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 02:44:16,508 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 02:44:16,508 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 02:44:16,508 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 02:44:16,508 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 02:44:16,509 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 02:44:16,509 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 02:44:16,509 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 02:44:16,509 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 02:44:16,509 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:44:16,509 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 02:44:16,509 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 02:44:16,510 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 02:44:16,510 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 02:44:16,510 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 02:44:16,510 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 02:44:16,510 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 02:44:16,510 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 02:44:16,510 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 02:44:16,510 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 02:44:16,511 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 02:44:16,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 02:44:16,661 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 02:44:16,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 02:44:16,663 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 02:44:16,663 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 02:44:16,664 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-buffer-mult-alt2.wvr_bound2.c [2023-08-04 02:44:17,707 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 02:44:17,839 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 02:44:17,839 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-buffer-mult-alt2.wvr_bound2.c [2023-08-04 02:44:17,846 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5942c6d00/1787d7e870004209a686b17ce56cb5ad/FLAGe76354b26 [2023-08-04 02:44:17,859 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5942c6d00/1787d7e870004209a686b17ce56cb5ad [2023-08-04 02:44:17,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 02:44:17,864 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 02:44:17,866 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 02:44:17,866 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 02:44:17,868 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 02:44:17,868 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:44:17" (1/1) ... [2023-08-04 02:44:17,869 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66128f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:44:17, skipping insertion in model container [2023-08-04 02:44:17,869 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:44:17" (1/1) ... [2023-08-04 02:44:17,896 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 02:44:18,013 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-buffer-mult-alt2.wvr_bound2.c[4498,4511] [2023-08-04 02:44:18,018 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:44:18,024 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 02:44:18,046 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-buffer-mult-alt2.wvr_bound2.c[4498,4511] [2023-08-04 02:44:18,048 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:44:18,053 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 02:44:18,053 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 02:44:18,058 INFO L206 MainTranslator]: Completed translation [2023-08-04 02:44:18,058 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:44:18 WrapperNode [2023-08-04 02:44:18,058 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 02:44:18,059 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 02:44:18,059 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 02:44:18,059 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 02:44:18,063 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:44:18" (1/1) ... [2023-08-04 02:44:18,070 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:44:18" (1/1) ... [2023-08-04 02:44:18,103 INFO L138 Inliner]: procedures = 26, calls = 75, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 390 [2023-08-04 02:44:18,103 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 02:44:18,104 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 02:44:18,104 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 02:44:18,104 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 02:44:18,113 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:44:18" (1/1) ... [2023-08-04 02:44:18,113 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:44:18" (1/1) ... [2023-08-04 02:44:18,117 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:44:18" (1/1) ... [2023-08-04 02:44:18,117 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:44:18" (1/1) ... [2023-08-04 02:44:18,124 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:44:18" (1/1) ... [2023-08-04 02:44:18,139 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:44:18" (1/1) ... [2023-08-04 02:44:18,141 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:44:18" (1/1) ... [2023-08-04 02:44:18,142 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:44:18" (1/1) ... [2023-08-04 02:44:18,144 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 02:44:18,145 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 02:44:18,145 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 02:44:18,145 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 02:44:18,146 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:44:18" (1/1) ... [2023-08-04 02:44:18,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:44:18,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:44:18,168 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) [2023-08-04 02:44:18,176 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 [2023-08-04 02:44:18,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 02:44:18,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 02:44:18,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 02:44:18,204 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 02:44:18,204 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 02:44:18,204 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 02:44:18,204 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 02:44:18,204 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 02:44:18,205 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 02:44:18,206 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 02:44:18,206 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-04 02:44:18,206 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-04 02:44:18,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 02:44:18,206 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 02:44:18,207 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 02:44:18,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 02:44:18,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 02:44:18,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 02:44:18,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 02:44:18,208 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 02:44:18,317 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 02:44:18,319 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 02:44:18,696 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 02:44:18,807 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 02:44:18,807 INFO L302 CfgBuilder]: Removed 14 assume(true) statements. [2023-08-04 02:44:18,809 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:44:18 BoogieIcfgContainer [2023-08-04 02:44:18,809 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 02:44:18,811 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 02:44:18,811 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 02:44:18,813 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 02:44:18,813 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 02:44:17" (1/3) ... [2023-08-04 02:44:18,813 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e5ac8f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:44:18, skipping insertion in model container [2023-08-04 02:44:18,813 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:44:18" (2/3) ... [2023-08-04 02:44:18,814 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e5ac8f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:44:18, skipping insertion in model container [2023-08-04 02:44:18,814 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:44:18" (3/3) ... [2023-08-04 02:44:18,814 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-bad-buffer-mult-alt2.wvr_bound2.c [2023-08-04 02:44:18,819 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 02:44:18,825 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 02:44:18,825 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 02:44:18,825 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 02:44:18,886 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2023-08-04 02:44:18,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 271 places, 305 transitions, 678 flow [2023-08-04 02:44:19,157 INFO L124 PetriNetUnfolderBase]: 278/1573 cut-off events. [2023-08-04 02:44:19,158 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 02:44:19,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1751 conditions, 1573 events. 278/1573 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 9901 event pairs, 0 based on Foata normal form. 0/1313 useless extension candidates. Maximal degree in co-relation 904. Up to 33 conditions per place. [2023-08-04 02:44:19,171 INFO L82 GeneralOperation]: Start removeDead. Operand has 271 places, 305 transitions, 678 flow [2023-08-04 02:44:19,184 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 271 places, 305 transitions, 678 flow [2023-08-04 02:44:19,187 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:44:19,196 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 271 places, 305 transitions, 678 flow [2023-08-04 02:44:19,199 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 271 places, 305 transitions, 678 flow [2023-08-04 02:44:19,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 271 places, 305 transitions, 678 flow [2023-08-04 02:44:19,375 INFO L124 PetriNetUnfolderBase]: 278/1573 cut-off events. [2023-08-04 02:44:19,375 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 02:44:19,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1751 conditions, 1573 events. 278/1573 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 9901 event pairs, 0 based on Foata normal form. 0/1313 useless extension candidates. Maximal degree in co-relation 904. Up to 33 conditions per place. [2023-08-04 02:44:19,393 INFO L119 LiptonReduction]: Number of co-enabled transitions 7232 [2023-08-04 02:44:27,487 INFO L134 LiptonReduction]: Checked pairs total: 20729 [2023-08-04 02:44:27,487 INFO L136 LiptonReduction]: Total number of compositions: 277 [2023-08-04 02:44:27,498 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:44:27,503 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@28f9ff03, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:44:27,503 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 02:44:27,508 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:44:27,508 INFO L124 PetriNetUnfolderBase]: 4/35 cut-off events. [2023-08-04 02:44:27,509 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:44:27,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:44:27,509 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 02:44:27,510 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 02:44:27,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:44:27,514 INFO L85 PathProgramCache]: Analyzing trace with hash -829089760, now seen corresponding path program 1 times [2023-08-04 02:44:27,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:44:27,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597958600] [2023-08-04 02:44:27,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:44:27,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:44:27,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:44:27,716 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 02:44:27,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:44:27,799 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 02:44:27,801 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 02:44:27,801 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 02:44:27,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 02:44:27,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 02:44:27,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 02:44:27,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 02:44:27,803 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 02:44:27,808 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (1/2) [2023-08-04 02:44:27,809 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 02:44:27,809 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 02:44:27,849 INFO L144 ThreadInstanceAdder]: Constructed 32 joinOtherThreadTransitions. [2023-08-04 02:44:27,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 307 places, 357 transitions, 858 flow [2023-08-04 02:44:30,346 INFO L124 PetriNetUnfolderBase]: 5491/20306 cut-off events. [2023-08-04 02:44:30,347 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 02:44:30,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24691 conditions, 20306 events. 5491/20306 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 214192 event pairs, 162 based on Foata normal form. 0/17336 useless extension candidates. Maximal degree in co-relation 12266. Up to 1024 conditions per place. [2023-08-04 02:44:30,492 INFO L82 GeneralOperation]: Start removeDead. Operand has 307 places, 357 transitions, 858 flow [2023-08-04 02:44:30,695 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 307 places, 357 transitions, 858 flow [2023-08-04 02:44:30,696 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:44:30,696 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 307 places, 357 transitions, 858 flow [2023-08-04 02:44:30,696 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 307 places, 357 transitions, 858 flow [2023-08-04 02:44:30,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 307 places, 357 transitions, 858 flow [2023-08-04 02:44:32,821 INFO L124 PetriNetUnfolderBase]: 5491/20306 cut-off events. [2023-08-04 02:44:32,821 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 02:44:32,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24691 conditions, 20306 events. 5491/20306 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 214192 event pairs, 162 based on Foata normal form. 0/17336 useless extension candidates. Maximal degree in co-relation 12266. Up to 1024 conditions per place. [2023-08-04 02:44:33,114 INFO L119 LiptonReduction]: Number of co-enabled transitions 18816 [2023-08-04 02:44:41,941 INFO L134 LiptonReduction]: Checked pairs total: 77425 [2023-08-04 02:44:41,941 INFO L136 LiptonReduction]: Total number of compositions: 287 [2023-08-04 02:44:41,943 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:44:41,944 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@28f9ff03, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:44:41,944 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 02:44:41,951 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:44:41,951 INFO L124 PetriNetUnfolderBase]: 18/154 cut-off events. [2023-08-04 02:44:41,951 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 02:44:41,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:44:41,951 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 02:44:41,951 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 02:44:41,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:44:41,951 INFO L85 PathProgramCache]: Analyzing trace with hash 974407633, now seen corresponding path program 1 times [2023-08-04 02:44:41,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:44:41,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974332076] [2023-08-04 02:44:41,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:44:41,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:44:41,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:44:42,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:44:42,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:44:42,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974332076] [2023-08-04 02:44:42,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974332076] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:44:42,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226198203] [2023-08-04 02:44:42,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:44:42,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:44:42,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:44:42,146 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) [2023-08-04 02:44:42,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 02:44:42,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:44:42,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:44:42,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:44:42,295 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:44:42,295 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:44:42,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226198203] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:44:42,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:44:42,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:44:42,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517871656] [2023-08-04 02:44:42,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:44:42,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:44:42,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:44:42,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:44:42,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:44:42,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 644 [2023-08-04 02:44:42,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 114 transitions, 372 flow. Second operand has 5 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:44:42,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:44:42,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 644 [2023-08-04 02:44:42,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand