/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/pthread-wmm_mix016_pso.opt_tso.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 23:17:58,859 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 23:17:58,896 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 23:17:58,898 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 23:17:58,899 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 23:17:58,899 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 23:17:58,899 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 23:17:58,912 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 23:17:58,912 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 23:17:58,912 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 23:17:58,913 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 23:17:58,913 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 23:17:58,913 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 23:17:58,914 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 23:17:58,914 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 23:17:58,914 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 23:17:58,914 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 23:17:58,915 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 23:17:58,915 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 23:17:58,915 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 23:17:58,915 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 23:17:58,916 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 23:17:58,916 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 23:17:58,916 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 23:17:58,916 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 23:17:58,916 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 23:17:58,917 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 23:17:58,917 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 23:17:58,917 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 23:17:58,917 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 23:17:58,918 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:17:58,918 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 23:17:58,918 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 23:17:58,918 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 23:17:58,918 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 23:17:58,919 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 23:17:58,919 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 23:17:58,919 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 23:17:58,919 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 23:17:58,920 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 23:17:58,920 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 23:17:58,920 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 23:17:59,079 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 23:17:59,090 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 23:17:59,092 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 23:17:59,093 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 23:17:59,093 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 23:17:59,093 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix016_pso.opt_tso.opt_bound2.i [2023-08-03 23:17:59,993 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 23:18:00,262 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 23:18:00,262 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix016_pso.opt_tso.opt_bound2.i [2023-08-03 23:18:00,283 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e63fe3c4a/c3d7b333d68f4128bd1d1c889750b072/FLAG44fe89621 [2023-08-03 23:18:00,293 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e63fe3c4a/c3d7b333d68f4128bd1d1c889750b072 [2023-08-03 23:18:00,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 23:18:00,296 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 23:18:00,297 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 23:18:00,297 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 23:18:00,299 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 23:18:00,300 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:18:00" (1/1) ... [2023-08-03 23:18:00,300 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32a6b258 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:18:00, skipping insertion in model container [2023-08-03 23:18:00,301 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:18:00" (1/1) ... [2023-08-03 23:18:00,335 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 23:18:00,444 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix016_pso.opt_tso.opt_bound2.i[956,969] [2023-08-03 23:18:00,613 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:18:00,621 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 23:18:00,628 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix016_pso.opt_tso.opt_bound2.i[956,969] [2023-08-03 23:18:00,636 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 23:18:00,638 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 23:18:00,659 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:18:00,678 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:18:00,678 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:18:00,682 INFO L206 MainTranslator]: Completed translation [2023-08-03 23:18:00,683 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:18:00 WrapperNode [2023-08-03 23:18:00,683 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 23:18:00,683 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 23:18:00,684 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 23:18:00,684 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 23:18:00,689 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:18:00" (1/1) ... [2023-08-03 23:18:00,709 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:18:00" (1/1) ... [2023-08-03 23:18:00,732 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 174 [2023-08-03 23:18:00,732 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 23:18:00,732 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 23:18:00,733 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 23:18:00,733 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 23:18:00,738 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:18:00" (1/1) ... [2023-08-03 23:18:00,738 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:18:00" (1/1) ... [2023-08-03 23:18:00,741 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:18:00" (1/1) ... [2023-08-03 23:18:00,741 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:18:00" (1/1) ... [2023-08-03 23:18:00,747 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:18:00" (1/1) ... [2023-08-03 23:18:00,749 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:18:00" (1/1) ... [2023-08-03 23:18:00,751 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:18:00" (1/1) ... [2023-08-03 23:18:00,752 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:18:00" (1/1) ... [2023-08-03 23:18:00,754 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 23:18:00,755 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 23:18:00,755 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 23:18:00,755 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 23:18:00,755 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:18:00" (1/1) ... [2023-08-03 23:18:00,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:18:00,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:18:00,790 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) [2023-08-03 23:18:00,797 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 [2023-08-03 23:18:00,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 23:18:00,816 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 23:18:00,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 23:18:00,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 23:18:00,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 23:18:00,817 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 23:18:00,817 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 23:18:00,818 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 23:18:00,818 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 23:18:00,818 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 23:18:00,818 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 23:18:00,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 23:18:00,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 23:18:00,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 23:18:00,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 23:18:00,820 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 23:18:00,945 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 23:18:00,946 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 23:18:01,159 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 23:18:01,252 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 23:18:01,253 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-03 23:18:01,254 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:18:01 BoogieIcfgContainer [2023-08-03 23:18:01,254 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 23:18:01,256 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 23:18:01,256 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 23:18:01,258 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 23:18:01,258 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 11:18:00" (1/3) ... [2023-08-03 23:18:01,258 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e28fdd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:18:01, skipping insertion in model container [2023-08-03 23:18:01,258 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:18:00" (2/3) ... [2023-08-03 23:18:01,258 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e28fdd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:18:01, skipping insertion in model container [2023-08-03 23:18:01,259 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:18:01" (3/3) ... [2023-08-03 23:18:01,259 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_mix016_pso.opt_tso.opt_bound2.i [2023-08-03 23:18:01,264 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 23:18:01,270 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 23:18:01,270 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 23:18:01,270 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 23:18:01,328 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:18:01,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 130 transitions, 275 flow [2023-08-03 23:18:01,460 INFO L124 PetriNetUnfolderBase]: 30/454 cut-off events. [2023-08-03 23:18:01,460 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:18:01,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 479 conditions, 454 events. 30/454 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1999 event pairs, 0 based on Foata normal form. 0/398 useless extension candidates. Maximal degree in co-relation 267. Up to 16 conditions per place. [2023-08-03 23:18:01,467 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 130 transitions, 275 flow [2023-08-03 23:18:01,470 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 101 transitions, 217 flow [2023-08-03 23:18:01,472 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:18:01,488 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 106 places, 101 transitions, 217 flow [2023-08-03 23:18:01,493 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 106 places, 101 transitions, 217 flow [2023-08-03 23:18:01,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 101 transitions, 217 flow [2023-08-03 23:18:01,523 INFO L124 PetriNetUnfolderBase]: 6/222 cut-off events. [2023-08-03 23:18:01,523 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:18:01,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 222 events. 6/222 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 655 event pairs, 0 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 151. Up to 8 conditions per place. [2023-08-03 23:18:01,525 INFO L119 LiptonReduction]: Number of co-enabled transitions 1248 [2023-08-03 23:18:03,975 INFO L134 LiptonReduction]: Checked pairs total: 2832 [2023-08-03 23:18:03,975 INFO L136 LiptonReduction]: Total number of compositions: 81 [2023-08-03 23:18:03,991 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:18:03,995 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;@200dbbe3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:18:03,995 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 23:18:03,997 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:18:03,998 INFO L124 PetriNetUnfolderBase]: 0/19 cut-off events. [2023-08-03 23:18:03,998 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:18:03,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:18:03,998 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 23:18:03,998 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:18:04,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:18:04,001 INFO L85 PathProgramCache]: Analyzing trace with hash -873530319, now seen corresponding path program 1 times [2023-08-03 23:18:04,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:18:04,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250469067] [2023-08-03 23:18:04,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:18:04,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:18:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:18:04,078 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 23:18:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:18:04,104 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 23:18:04,105 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 23:18:04,106 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 23:18:04,107 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 23:18:04,107 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 23:18:04,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 23:18:04,107 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 23:18:04,109 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-03 23:18:04,109 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 23:18:04,109 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 23:18:04,129 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:18:04,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 154 transitions, 344 flow [2023-08-03 23:18:04,252 INFO L124 PetriNetUnfolderBase]: 93/1405 cut-off events. [2023-08-03 23:18:04,252 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:18:04,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1503 conditions, 1405 events. 93/1405 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 9708 event pairs, 0 based on Foata normal form. 0/1228 useless extension candidates. Maximal degree in co-relation 1010. Up to 54 conditions per place. [2023-08-03 23:18:04,257 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 154 transitions, 344 flow [2023-08-03 23:18:04,259 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 125 transitions, 286 flow [2023-08-03 23:18:04,260 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:18:04,260 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 125 transitions, 286 flow [2023-08-03 23:18:04,260 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 125 transitions, 286 flow [2023-08-03 23:18:04,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 125 transitions, 286 flow [2023-08-03 23:18:04,318 INFO L124 PetriNetUnfolderBase]: 12/622 cut-off events. [2023-08-03 23:18:04,318 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:18:04,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 720 conditions, 622 events. 12/622 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3226 event pairs, 0 based on Foata normal form. 0/580 useless extension candidates. Maximal degree in co-relation 488. Up to 27 conditions per place. [2023-08-03 23:18:04,328 INFO L119 LiptonReduction]: Number of co-enabled transitions 3492 [2023-08-03 23:18:06,861 INFO L134 LiptonReduction]: Checked pairs total: 11159 [2023-08-03 23:18:06,861 INFO L136 LiptonReduction]: Total number of compositions: 88 [2023-08-03 23:18:06,862 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:18:06,863 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;@200dbbe3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:18:06,863 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 23:18:06,868 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:18:06,868 INFO L124 PetriNetUnfolderBase]: 0/61 cut-off events. [2023-08-03 23:18:06,868 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-03 23:18:06,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:18:06,868 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 23:18:06,868 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:18:06,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:18:06,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1922769845, now seen corresponding path program 1 times [2023-08-03 23:18:06,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:18:06,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961029624] [2023-08-03 23:18:06,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:18:06,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:18:06,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:18:06,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:18:06,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:18:06,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961029624] [2023-08-03 23:18:06,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961029624] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:18:06,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:18:06,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:18:06,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858098311] [2023-08-03 23:18:06,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:18:06,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:18:06,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:18:07,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:18:07,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:18:07,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 242 [2023-08-03 23:18:07,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:07,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:18:07,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 242 [2023-08-03 23:18:07,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:18:15,299 INFO L124 PetriNetUnfolderBase]: 78164/103722 cut-off events. [2023-08-03 23:18:15,299 INFO L125 PetriNetUnfolderBase]: For 5340/5340 co-relation queries the response was YES. [2023-08-03 23:18:15,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210497 conditions, 103722 events. 78164/103722 cut-off events. For 5340/5340 co-relation queries the response was YES. Maximal size of possible extension queue 3293. Compared 662401 event pairs, 63366 based on Foata normal form. 0/96128 useless extension candidates. Maximal degree in co-relation 60294. Up to 100362 conditions per place. [2023-08-03 23:18:15,803 INFO L140 encePairwiseOnDemand]: 239/242 looper letters, 36 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-08-03 23:18:15,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 48 transitions, 208 flow [2023-08-03 23:18:15,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:18:15,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:18:15,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 420 transitions. [2023-08-03 23:18:15,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785123966942148 [2023-08-03 23:18:15,820 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 420 transitions. [2023-08-03 23:18:15,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 420 transitions. [2023-08-03 23:18:15,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:18:15,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 420 transitions. [2023-08-03 23:18:15,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:15,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:15,834 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:15,835 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 124 flow. Second operand 3 states and 420 transitions. [2023-08-03 23:18:15,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 48 transitions, 208 flow [2023-08-03 23:18:15,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 48 transitions, 202 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 23:18:15,851 INFO L231 Difference]: Finished difference. Result has 60 places, 45 transitions, 130 flow [2023-08-03 23:18:15,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=60, PETRI_TRANSITIONS=45} [2023-08-03 23:18:15,855 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 3 predicate places. [2023-08-03 23:18:15,856 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 45 transitions, 130 flow [2023-08-03 23:18:15,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:15,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:18:15,861 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 23:18:15,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 23:18:15,861 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:18:15,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:18:15,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1603989201, now seen corresponding path program 1 times [2023-08-03 23:18:15,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:18:15,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109875311] [2023-08-03 23:18:15,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:18:15,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:18:15,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:18:15,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:18:15,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:18:15,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109875311] [2023-08-03 23:18:15,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109875311] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:18:15,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555473545] [2023-08-03 23:18:15,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:18:15,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:18:15,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:18:15,955 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) [2023-08-03 23:18:15,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 23:18:16,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:18:16,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:18:16,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:18:16,090 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:18:16,091 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:18:16,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555473545] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:18:16,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:18:16,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 23:18:16,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662090629] [2023-08-03 23:18:16,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:18:16,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:18:16,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:18:16,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:18:16,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:18:16,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 242 [2023-08-03 23:18:16,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 45 transitions, 130 flow. Second operand has 5 states, 5 states have (on average 127.6) internal successors, (638), 5 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:16,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:18:16,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 242 [2023-08-03 23:18:16,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:18:23,815 INFO L124 PetriNetUnfolderBase]: 78152/103677 cut-off events. [2023-08-03 23:18:23,815 INFO L125 PetriNetUnfolderBase]: For 4707/4707 co-relation queries the response was YES. [2023-08-03 23:18:23,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209867 conditions, 103677 events. 78152/103677 cut-off events. For 4707/4707 co-relation queries the response was YES. Maximal size of possible extension queue 3293. Compared 662309 event pairs, 52272 based on Foata normal form. 9/96125 useless extension candidates. Maximal degree in co-relation 74875. Up to 100315 conditions per place. [2023-08-03 23:18:24,338 INFO L140 encePairwiseOnDemand]: 238/242 looper letters, 39 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2023-08-03 23:18:24,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 52 transitions, 230 flow [2023-08-03 23:18:24,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:18:24,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:18:24,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 674 transitions. [2023-08-03 23:18:24,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5570247933884298 [2023-08-03 23:18:24,341 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 674 transitions. [2023-08-03 23:18:24,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 674 transitions. [2023-08-03 23:18:24,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:18:24,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 674 transitions. [2023-08-03 23:18:24,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.8) internal successors, (674), 5 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:24,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 242.0) internal successors, (1452), 6 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:24,345 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 242.0) internal successors, (1452), 6 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:24,345 INFO L175 Difference]: Start difference. First operand has 60 places, 45 transitions, 130 flow. Second operand 5 states and 674 transitions. [2023-08-03 23:18:24,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 52 transitions, 230 flow [2023-08-03 23:18:24,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 52 transitions, 227 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 23:18:24,347 INFO L231 Difference]: Finished difference. Result has 63 places, 45 transitions, 144 flow [2023-08-03 23:18:24,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=144, PETRI_PLACES=63, PETRI_TRANSITIONS=45} [2023-08-03 23:18:24,347 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 6 predicate places. [2023-08-03 23:18:24,347 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 45 transitions, 144 flow [2023-08-03 23:18:24,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 127.6) internal successors, (638), 5 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:24,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:18:24,348 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:18:24,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 23:18:24,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:18:24,553 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:18:24,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:18:24,554 INFO L85 PathProgramCache]: Analyzing trace with hash -66339273, now seen corresponding path program 1 times [2023-08-03 23:18:24,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:18:24,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27898831] [2023-08-03 23:18:24,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:18:24,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:18:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:18:24,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:18:24,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:18:24,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27898831] [2023-08-03 23:18:24,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27898831] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:18:24,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904540883] [2023-08-03 23:18:24,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:18:24,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:18:24,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:18:24,628 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:18:24,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 23:18:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:18:24,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 23:18:24,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:18:24,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:18:24,718 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:18:24,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904540883] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:18:24,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:18:24,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 23:18:24,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774922171] [2023-08-03 23:18:24,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:18:24,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:18:24,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:18:24,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:18:24,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:18:24,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 242 [2023-08-03 23:18:24,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 45 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:24,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:18:24,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 242 [2023-08-03 23:18:24,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:18:32,235 INFO L124 PetriNetUnfolderBase]: 75822/102876 cut-off events. [2023-08-03 23:18:32,235 INFO L125 PetriNetUnfolderBase]: For 4426/4426 co-relation queries the response was YES. [2023-08-03 23:18:32,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206175 conditions, 102876 events. 75822/102876 cut-off events. For 4426/4426 co-relation queries the response was YES. Maximal size of possible extension queue 3494. Compared 687269 event pairs, 59934 based on Foata normal form. 0/96059 useless extension candidates. Maximal degree in co-relation 59308. Up to 96840 conditions per place. [2023-08-03 23:18:32,719 INFO L140 encePairwiseOnDemand]: 239/242 looper letters, 42 selfloop transitions, 3 changer transitions 0/54 dead transitions. [2023-08-03 23:18:32,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 54 transitions, 252 flow [2023-08-03 23:18:32,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:18:32,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:18:32,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 425 transitions. [2023-08-03 23:18:32,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853994490358126 [2023-08-03 23:18:32,720 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 425 transitions. [2023-08-03 23:18:32,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 425 transitions. [2023-08-03 23:18:32,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:18:32,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 425 transitions. [2023-08-03 23:18:32,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:32,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:32,723 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:32,723 INFO L175 Difference]: Start difference. First operand has 63 places, 45 transitions, 144 flow. Second operand 3 states and 425 transitions. [2023-08-03 23:18:32,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 54 transitions, 252 flow [2023-08-03 23:18:32,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 54 transitions, 245 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 23:18:32,725 INFO L231 Difference]: Finished difference. Result has 64 places, 46 transitions, 152 flow [2023-08-03 23:18:32,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=64, PETRI_TRANSITIONS=46} [2023-08-03 23:18:32,733 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 7 predicate places. [2023-08-03 23:18:32,733 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 46 transitions, 152 flow [2023-08-03 23:18:32,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:32,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:18:32,734 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:18:32,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-03 23:18:32,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-03 23:18:32,939 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:18:32,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:18:32,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1846500078, now seen corresponding path program 1 times [2023-08-03 23:18:32,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:18:32,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996880281] [2023-08-03 23:18:32,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:18:32,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:18:32,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:18:32,999 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:18:32,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:18:33,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996880281] [2023-08-03 23:18:33,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996880281] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:18:33,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276101560] [2023-08-03 23:18:33,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:18:33,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:18:33,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:18:33,002 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:18:33,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 23:18:33,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:18:33,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:18:33,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:18:33,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:18:33,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:18:33,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:18:33,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276101560] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:18:33,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:18:33,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 23:18:33,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925333558] [2023-08-03 23:18:33,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:18:33,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:18:33,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:18:33,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:18:33,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:18:33,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 242 [2023-08-03 23:18:33,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 46 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 128.6) internal successors, (643), 5 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:33,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:18:33,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 242 [2023-08-03 23:18:33,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:18:39,149 INFO L124 PetriNetUnfolderBase]: 59515/79811 cut-off events. [2023-08-03 23:18:39,150 INFO L125 PetriNetUnfolderBase]: For 3690/3690 co-relation queries the response was YES. [2023-08-03 23:18:39,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160350 conditions, 79811 events. 59515/79811 cut-off events. For 3690/3690 co-relation queries the response was YES. Maximal size of possible extension queue 2913. Compared 507613 event pairs, 38349 based on Foata normal form. 3/74881 useless extension candidates. Maximal degree in co-relation 56955. Up to 75373 conditions per place. [2023-08-03 23:18:39,544 INFO L140 encePairwiseOnDemand]: 239/242 looper letters, 40 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2023-08-03 23:18:39,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 52 transitions, 245 flow [2023-08-03 23:18:39,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:18:39,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:18:39,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 547 transitions. [2023-08-03 23:18:39,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5650826446280992 [2023-08-03 23:18:39,545 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 547 transitions. [2023-08-03 23:18:39,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 547 transitions. [2023-08-03 23:18:39,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:18:39,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 547 transitions. [2023-08-03 23:18:39,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 136.75) internal successors, (547), 4 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:39,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:39,549 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:39,549 INFO L175 Difference]: Start difference. First operand has 64 places, 46 transitions, 152 flow. Second operand 4 states and 547 transitions. [2023-08-03 23:18:39,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 52 transitions, 245 flow [2023-08-03 23:18:39,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 52 transitions, 243 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:18:39,550 INFO L231 Difference]: Finished difference. Result has 66 places, 45 transitions, 147 flow [2023-08-03 23:18:39,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=147, PETRI_PLACES=66, PETRI_TRANSITIONS=45} [2023-08-03 23:18:39,551 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 9 predicate places. [2023-08-03 23:18:39,551 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 45 transitions, 147 flow [2023-08-03 23:18:39,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.6) internal successors, (643), 5 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:39,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:18:39,552 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:18:39,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-03 23:18:39,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:18:39,758 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:18:39,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:18:39,758 INFO L85 PathProgramCache]: Analyzing trace with hash -2050121805, now seen corresponding path program 1 times [2023-08-03 23:18:39,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:18:39,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578586508] [2023-08-03 23:18:39,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:18:39,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:18:39,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:18:39,828 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:18:39,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:18:39,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578586508] [2023-08-03 23:18:39,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578586508] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:18:39,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517287901] [2023-08-03 23:18:39,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:18:39,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:18:39,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:18:39,833 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:18:39,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 23:18:39,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:18:39,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:18:39,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:18:39,926 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:18:39,926 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:18:39,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517287901] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:18:39,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:18:39,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 23:18:39,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611937311] [2023-08-03 23:18:39,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:18:39,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:18:39,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:18:39,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:18:39,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:18:39,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 242 [2023-08-03 23:18:39,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 45 transitions, 147 flow. Second operand has 5 states, 5 states have (on average 128.6) internal successors, (643), 5 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:39,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:18:39,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 242 [2023-08-03 23:18:39,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:18:45,716 INFO L124 PetriNetUnfolderBase]: 59107/79408 cut-off events. [2023-08-03 23:18:45,717 INFO L125 PetriNetUnfolderBase]: For 3211/3211 co-relation queries the response was YES. [2023-08-03 23:18:45,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159336 conditions, 79408 events. 59107/79408 cut-off events. For 3211/3211 co-relation queries the response was YES. Maximal size of possible extension queue 2920. Compared 508006 event pairs, 17122 based on Foata normal form. 144/74511 useless extension candidates. Maximal degree in co-relation 56583. Up to 74007 conditions per place. [2023-08-03 23:18:46,068 INFO L140 encePairwiseOnDemand]: 238/242 looper letters, 55 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2023-08-03 23:18:46,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 67 transitions, 309 flow [2023-08-03 23:18:46,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:18:46,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:18:46,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 689 transitions. [2023-08-03 23:18:46,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5694214876033058 [2023-08-03 23:18:46,070 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 689 transitions. [2023-08-03 23:18:46,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 689 transitions. [2023-08-03 23:18:46,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:18:46,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 689 transitions. [2023-08-03 23:18:46,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:46,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 242.0) internal successors, (1452), 6 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:46,074 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 242.0) internal successors, (1452), 6 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:46,074 INFO L175 Difference]: Start difference. First operand has 66 places, 45 transitions, 147 flow. Second operand 5 states and 689 transitions. [2023-08-03 23:18:46,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 67 transitions, 309 flow [2023-08-03 23:18:46,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 67 transitions, 302 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 23:18:46,077 INFO L231 Difference]: Finished difference. Result has 67 places, 45 transitions, 157 flow [2023-08-03 23:18:46,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=157, PETRI_PLACES=67, PETRI_TRANSITIONS=45} [2023-08-03 23:18:46,080 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 10 predicate places. [2023-08-03 23:18:46,081 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 45 transitions, 157 flow [2023-08-03 23:18:46,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.6) internal successors, (643), 5 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:46,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:18:46,081 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:18:46,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-03 23:18:46,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:18:46,285 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:18:46,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:18:46,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1339187473, now seen corresponding path program 1 times [2023-08-03 23:18:46,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:18:46,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665968024] [2023-08-03 23:18:46,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:18:46,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:18:46,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:18:46,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:18:46,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:18:46,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665968024] [2023-08-03 23:18:46,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665968024] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:18:46,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146937404] [2023-08-03 23:18:46,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:18:46,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:18:46,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:18:46,326 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:18:46,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 23:18:46,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:18:46,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:18:46,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:18:46,412 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:18:46,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:18:46,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:18:46,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146937404] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:18:46,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:18:46,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 23:18:46,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544049445] [2023-08-03 23:18:46,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:18:46,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:18:46,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:18:46,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:18:46,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:18:46,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 242 [2023-08-03 23:18:46,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 45 transitions, 157 flow. Second operand has 5 states, 5 states have (on average 129.4) internal successors, (647), 5 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:46,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:18:46,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 242 [2023-08-03 23:18:46,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:18:51,239 INFO L124 PetriNetUnfolderBase]: 49312/65653 cut-off events. [2023-08-03 23:18:51,240 INFO L125 PetriNetUnfolderBase]: For 3493/3493 co-relation queries the response was YES. [2023-08-03 23:18:51,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132300 conditions, 65653 events. 49312/65653 cut-off events. For 3493/3493 co-relation queries the response was YES. Maximal size of possible extension queue 2651. Compared 402976 event pairs, 30214 based on Foata normal form. 36/61656 useless extension candidates. Maximal degree in co-relation 46892. Up to 61204 conditions per place. [2023-08-03 23:18:51,548 INFO L140 encePairwiseOnDemand]: 239/242 looper letters, 51 selfloop transitions, 3 changer transitions 0/62 dead transitions. [2023-08-03 23:18:51,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 62 transitions, 295 flow [2023-08-03 23:18:51,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:18:51,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:18:51,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 558 transitions. [2023-08-03 23:18:51,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5764462809917356 [2023-08-03 23:18:51,550 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 558 transitions. [2023-08-03 23:18:51,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 558 transitions. [2023-08-03 23:18:51,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:18:51,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 558 transitions. [2023-08-03 23:18:51,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 139.5) internal successors, (558), 4 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:51,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:51,553 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:51,553 INFO L175 Difference]: Start difference. First operand has 67 places, 45 transitions, 157 flow. Second operand 4 states and 558 transitions. [2023-08-03 23:18:51,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 62 transitions, 295 flow [2023-08-03 23:18:51,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 62 transitions, 290 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 23:18:51,555 INFO L231 Difference]: Finished difference. Result has 68 places, 44 transitions, 150 flow [2023-08-03 23:18:51,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=68, PETRI_TRANSITIONS=44} [2023-08-03 23:18:51,555 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 11 predicate places. [2023-08-03 23:18:51,555 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 44 transitions, 150 flow [2023-08-03 23:18:51,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.4) internal successors, (647), 5 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:51,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:18:51,556 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:18:51,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-03 23:18:51,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:18:51,758 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:18:51,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:18:51,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1809048395, now seen corresponding path program 1 times [2023-08-03 23:18:51,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:18:51,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163667749] [2023-08-03 23:18:51,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:18:51,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:18:51,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:18:51,822 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 23:18:51,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:18:51,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163667749] [2023-08-03 23:18:51,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163667749] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:18:51,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:18:51,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 23:18:51,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783779366] [2023-08-03 23:18:51,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:18:51,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 23:18:51,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:18:51,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 23:18:51,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-03 23:18:51,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 242 [2023-08-03 23:18:51,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 44 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 130.75) internal successors, (523), 4 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:51,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:18:51,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 242 [2023-08-03 23:18:51,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:18:54,429 INFO L124 PetriNetUnfolderBase]: 25984/35557 cut-off events. [2023-08-03 23:18:54,429 INFO L125 PetriNetUnfolderBase]: For 2431/2431 co-relation queries the response was YES. [2023-08-03 23:18:54,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73008 conditions, 35557 events. 25984/35557 cut-off events. For 2431/2431 co-relation queries the response was YES. Maximal size of possible extension queue 1431. Compared 211593 event pairs, 952 based on Foata normal form. 5184/38436 useless extension candidates. Maximal degree in co-relation 25976. Up to 28224 conditions per place. [2023-08-03 23:18:54,515 INFO L140 encePairwiseOnDemand]: 240/242 looper letters, 0 selfloop transitions, 0 changer transitions 68/68 dead transitions. [2023-08-03 23:18:54,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 68 transitions, 318 flow [2023-08-03 23:18:54,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:18:54,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:18:54,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 568 transitions. [2023-08-03 23:18:54,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5867768595041323 [2023-08-03 23:18:54,516 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 568 transitions. [2023-08-03 23:18:54,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 568 transitions. [2023-08-03 23:18:54,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:18:54,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 568 transitions. [2023-08-03 23:18:54,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:54,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:54,519 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:54,519 INFO L175 Difference]: Start difference. First operand has 68 places, 44 transitions, 150 flow. Second operand 4 states and 568 transitions. [2023-08-03 23:18:54,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 68 transitions, 318 flow [2023-08-03 23:18:54,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 68 transitions, 311 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 23:18:54,640 INFO L231 Difference]: Finished difference. Result has 66 places, 0 transitions, 0 flow [2023-08-03 23:18:54,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=66, PETRI_TRANSITIONS=0} [2023-08-03 23:18:54,640 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 9 predicate places. [2023-08-03 23:18:54,640 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 0 transitions, 0 flow [2023-08-03 23:18:54,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 130.75) internal successors, (523), 4 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:54,641 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 23:18:54,641 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 23:18:54,641 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 23:18:54,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-03 23:18:54,641 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:18:54,641 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-03 23:18:54,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 154 transitions, 344 flow [2023-08-03 23:18:54,710 INFO L124 PetriNetUnfolderBase]: 93/1405 cut-off events. [2023-08-03 23:18:54,711 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:18:54,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1503 conditions, 1405 events. 93/1405 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 9708 event pairs, 0 based on Foata normal form. 0/1228 useless extension candidates. Maximal degree in co-relation 1010. Up to 54 conditions per place. [2023-08-03 23:18:54,712 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 154 transitions, 344 flow [2023-08-03 23:18:54,714 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 160 places, 152 transitions, 332 flow [2023-08-03 23:18:54,714 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:18:54,714 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 160 places, 152 transitions, 332 flow [2023-08-03 23:18:54,715 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 160 places, 152 transitions, 332 flow [2023-08-03 23:18:54,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 152 transitions, 332 flow [2023-08-03 23:18:54,783 INFO L124 PetriNetUnfolderBase]: 93/1401 cut-off events. [2023-08-03 23:18:54,783 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-08-03 23:18:54,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1491 conditions, 1401 events. 93/1401 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 9653 event pairs, 0 based on Foata normal form. 0/1224 useless extension candidates. Maximal degree in co-relation 1004. Up to 54 conditions per place. [2023-08-03 23:18:54,799 INFO L119 LiptonReduction]: Number of co-enabled transitions 5856 [2023-08-03 23:18:57,614 INFO L134 LiptonReduction]: Checked pairs total: 15076 [2023-08-03 23:18:57,614 INFO L136 LiptonReduction]: Total number of compositions: 119 [2023-08-03 23:18:57,615 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 23:18:57,616 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;@200dbbe3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:18:57,616 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 23:18:57,617 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:18:57,617 INFO L124 PetriNetUnfolderBase]: 1/24 cut-off events. [2023-08-03 23:18:57,617 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 23:18:57,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:18:57,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 23:18:57,618 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:18:57,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:18:57,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1924076268, now seen corresponding path program 1 times [2023-08-03 23:18:57,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:18:57,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155110034] [2023-08-03 23:18:57,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:18:57,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:18:57,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:18:57,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:18:57,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:18:57,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155110034] [2023-08-03 23:18:57,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155110034] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:18:57,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:18:57,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:18:57,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40429489] [2023-08-03 23:18:57,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:18:57,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:18:57,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:18:57,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:18:57,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:18:57,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 273 [2023-08-03 23:18:57,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:57,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:18:57,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 273 [2023-08-03 23:18:57,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:19:24,545 INFO L124 PetriNetUnfolderBase]: 292934/382383 cut-off events. [2023-08-03 23:19:24,546 INFO L125 PetriNetUnfolderBase]: For 5457/5457 co-relation queries the response was YES. [2023-08-03 23:19:25,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 758486 conditions, 382383 events. 292934/382383 cut-off events. For 5457/5457 co-relation queries the response was YES. Maximal size of possible extension queue 9913. Compared 2568032 event pairs, 242016 based on Foata normal form. 0/337325 useless extension candidates. Maximal degree in co-relation 218877. Up to 369312 conditions per place. [2023-08-03 23:19:26,233 INFO L140 encePairwiseOnDemand]: 269/273 looper letters, 41 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2023-08-03 23:19:26,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 51 transitions, 216 flow [2023-08-03 23:19:26,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:19:26,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:19:26,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 426 transitions. [2023-08-03 23:19:26,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5201465201465202 [2023-08-03 23:19:26,235 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 426 transitions. [2023-08-03 23:19:26,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 426 transitions. [2023-08-03 23:19:26,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:19:26,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 426 transitions. [2023-08-03 23:19:26,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:19:26,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:19:26,237 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:19:26,237 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 124 flow. Second operand 3 states and 426 transitions. [2023-08-03 23:19:26,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 51 transitions, 216 flow [2023-08-03 23:19:26,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 51 transitions, 214 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-03 23:19:26,243 INFO L231 Difference]: Finished difference. Result has 63 places, 48 transitions, 132 flow [2023-08-03 23:19:26,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=63, PETRI_TRANSITIONS=48} [2023-08-03 23:19:26,244 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2023-08-03 23:19:26,244 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 48 transitions, 132 flow [2023-08-03 23:19:26,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:19:26,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:19:26,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:19:26,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-03 23:19:26,244 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:19:26,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:19:26,244 INFO L85 PathProgramCache]: Analyzing trace with hash 354626730, now seen corresponding path program 1 times [2023-08-03 23:19:26,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:19:26,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235381485] [2023-08-03 23:19:26,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:19:26,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:19:26,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:19:26,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:19:26,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:19:26,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235381485] [2023-08-03 23:19:26,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235381485] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:19:26,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710119674] [2023-08-03 23:19:26,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:19:26,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:19:26,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:19:26,277 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:19:26,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 23:19:26,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:19:26,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 23:19:26,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:19:26,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 23:19:26,356 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:19:26,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710119674] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:19:26,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:19:26,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 23:19:26,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528498021] [2023-08-03 23:19:26,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:19:26,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:19:26,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:19:26,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:19:26,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:19:26,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 273 [2023-08-03 23:19:26,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 48 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:19:26,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:19:26,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 273 [2023-08-03 23:19:26,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand