/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 PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe018_power.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 07:05:03,314 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 07:05:03,358 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 07:05:03,362 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 07:05:03,362 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 07:05:03,362 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 07:05:03,363 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 07:05:03,379 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 07:05:03,380 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 07:05:03,380 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 07:05:03,381 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 07:05:03,381 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 07:05:03,381 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 07:05:03,382 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 07:05:03,382 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 07:05:03,382 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 07:05:03,383 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 07:05:03,383 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 07:05:03,383 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 07:05:03,383 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 07:05:03,384 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 07:05:03,384 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 07:05:03,385 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 07:05:03,385 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 07:05:03,385 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 07:05:03,385 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 07:05:03,386 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 07:05:03,386 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 07:05:03,386 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 07:05:03,387 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 07:05:03,387 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:05:03,387 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 07:05:03,387 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 07:05:03,388 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 07:05:03,388 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 07:05:03,388 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 07:05:03,388 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 07:05:03,389 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 07:05:03,389 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 07:05:03,389 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 07:05:03,389 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 07:05:03,393 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 07:05:03,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 07:05:03,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 07:05:03,660 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 07:05:03,661 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 07:05:03,661 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 07:05:03,662 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe018_power.opt_bound2.i [2023-08-04 07:05:04,863 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 07:05:05,059 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 07:05:05,060 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe018_power.opt_bound2.i [2023-08-04 07:05:05,076 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3f7c02ad/983aa98317984e818b7f50f5a1727804/FLAG62c1ff368 [2023-08-04 07:05:05,088 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3f7c02ad/983aa98317984e818b7f50f5a1727804 [2023-08-04 07:05:05,091 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 07:05:05,092 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 07:05:05,093 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 07:05:05,093 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 07:05:05,096 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 07:05:05,096 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:05:05" (1/1) ... [2023-08-04 07:05:05,097 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48c150a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:05:05, skipping insertion in model container [2023-08-04 07:05:05,097 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:05:05" (1/1) ... [2023-08-04 07:05:05,135 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 07:05:05,301 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_safe018_power.opt_bound2.i[994,1007] [2023-08-04 07:05:05,481 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:05:05,497 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 07:05:05,508 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_safe018_power.opt_bound2.i[994,1007] [2023-08-04 07:05:05,524 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 07:05:05,526 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 07:05:05,592 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:05:05,628 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:05:05,628 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:05:05,634 INFO L206 MainTranslator]: Completed translation [2023-08-04 07:05:05,636 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:05:05 WrapperNode [2023-08-04 07:05:05,637 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 07:05:05,638 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 07:05:05,639 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 07:05:05,639 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 07:05:05,645 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:05:05" (1/1) ... [2023-08-04 07:05:05,669 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:05:05" (1/1) ... [2023-08-04 07:05:05,695 INFO L138 Inliner]: procedures = 176, calls = 75, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 202 [2023-08-04 07:05:05,696 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 07:05:05,696 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 07:05:05,697 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 07:05:05,697 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 07:05:05,704 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:05:05" (1/1) ... [2023-08-04 07:05:05,705 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:05:05" (1/1) ... [2023-08-04 07:05:05,709 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:05:05" (1/1) ... [2023-08-04 07:05:05,709 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:05:05" (1/1) ... [2023-08-04 07:05:05,724 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:05:05" (1/1) ... [2023-08-04 07:05:05,728 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:05:05" (1/1) ... [2023-08-04 07:05:05,731 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:05:05" (1/1) ... [2023-08-04 07:05:05,732 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:05:05" (1/1) ... [2023-08-04 07:05:05,736 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 07:05:05,737 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 07:05:05,737 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 07:05:05,737 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 07:05:05,738 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:05:05" (1/1) ... [2023-08-04 07:05:05,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:05:05,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:05:05,790 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) [2023-08-04 07:05:05,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 07:05:05,827 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 07:05:05,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 07:05:05,827 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 07:05:05,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 07:05:05,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 07:05:05,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 07:05:05,829 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 07:05:05,830 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 07:05:05,830 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 07:05:05,830 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 07:05:05,830 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 07:05:05,830 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 07:05:05,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 07:05:05,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 07:05:05,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 07:05:05,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 07:05:05,832 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 07:05:06,006 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 07:05:06,009 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 07:05:06,561 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 07:05:06,918 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 07:05:06,919 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 07:05:06,921 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:05:06 BoogieIcfgContainer [2023-08-04 07:05:06,921 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 07:05:06,925 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 07:05:06,925 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 07:05:06,928 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 07:05:06,929 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 07:05:05" (1/3) ... [2023-08-04 07:05:06,930 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28cce27e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:05:06, skipping insertion in model container [2023-08-04 07:05:06,930 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:05:05" (2/3) ... [2023-08-04 07:05:06,930 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28cce27e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:05:06, skipping insertion in model container [2023-08-04 07:05:06,930 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:05:06" (3/3) ... [2023-08-04 07:05:06,931 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe018_power.opt_bound2.i [2023-08-04 07:05:06,939 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 07:05:06,947 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 07:05:06,948 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-04 07:05:06,948 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 07:05:07,025 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:05:07,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 146 transitions, 307 flow [2023-08-04 07:05:07,246 INFO L124 PetriNetUnfolderBase]: 30/465 cut-off events. [2023-08-04 07:05:07,247 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:05:07,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 490 conditions, 465 events. 30/465 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1935 event pairs, 0 based on Foata normal form. 0/411 useless extension candidates. Maximal degree in co-relation 286. Up to 16 conditions per place. [2023-08-04 07:05:07,254 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 146 transitions, 307 flow [2023-08-04 07:05:07,259 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 147 places, 145 transitions, 303 flow [2023-08-04 07:05:07,261 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:05:07,269 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 147 places, 145 transitions, 303 flow [2023-08-04 07:05:07,271 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 147 places, 145 transitions, 303 flow [2023-08-04 07:05:07,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 145 transitions, 303 flow [2023-08-04 07:05:07,341 INFO L124 PetriNetUnfolderBase]: 30/464 cut-off events. [2023-08-04 07:05:07,341 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:05:07,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488 conditions, 464 events. 30/464 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1927 event pairs, 0 based on Foata normal form. 0/410 useless extension candidates. Maximal degree in co-relation 284. Up to 16 conditions per place. [2023-08-04 07:05:07,349 INFO L119 LiptonReduction]: Number of co-enabled transitions 2384 [2023-08-04 07:05:14,630 INFO L134 LiptonReduction]: Checked pairs total: 5671 [2023-08-04 07:05:14,630 INFO L136 LiptonReduction]: Total number of compositions: 131 [2023-08-04 07:05:14,640 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:05:14,645 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;@70ea654c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:05:14,646 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 07:05:14,649 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:05:14,649 INFO L124 PetriNetUnfolderBase]: 0/15 cut-off events. [2023-08-04 07:05:14,649 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:05:14,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:05:14,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 07:05:14,651 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:05:14,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:05:14,655 INFO L85 PathProgramCache]: Analyzing trace with hash 909286986, now seen corresponding path program 1 times [2023-08-04 07:05:14,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:05:14,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725001772] [2023-08-04 07:05:14,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:05:14,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:05:14,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:05:14,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:05:14,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:05:14,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725001772] [2023-08-04 07:05:14,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725001772] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:05:14,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:05:14,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:05:14,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555764278] [2023-08-04 07:05:14,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:05:14,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:05:14,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:05:14,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:05:14,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:05:14,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 277 [2023-08-04 07:05:14,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:14,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:05:14,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 277 [2023-08-04 07:05:14,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:05:15,556 INFO L124 PetriNetUnfolderBase]: 1677/2651 cut-off events. [2023-08-04 07:05:15,557 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 07:05:15,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5349 conditions, 2651 events. 1677/2651 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13478 event pairs, 1008 based on Foata normal form. 0/2215 useless extension candidates. Maximal degree in co-relation 5336. Up to 2570 conditions per place. [2023-08-04 07:05:15,576 INFO L140 encePairwiseOnDemand]: 274/277 looper letters, 27 selfloop transitions, 2 changer transitions 1/33 dead transitions. [2023-08-04 07:05:15,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 33 transitions, 139 flow [2023-08-04 07:05:15,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:05:15,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:05:15,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 406 transitions. [2023-08-04 07:05:15,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48856799037304455 [2023-08-04 07:05:15,596 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 406 transitions. [2023-08-04 07:05:15,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 406 transitions. [2023-08-04 07:05:15,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:05:15,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 406 transitions. [2023-08-04 07:05:15,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:15,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:15,613 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:15,614 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 71 flow. Second operand 3 states and 406 transitions. [2023-08-04 07:05:15,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 33 transitions, 139 flow [2023-08-04 07:05:15,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 33 transitions, 139 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:05:15,618 INFO L231 Difference]: Finished difference. Result has 39 places, 29 transitions, 79 flow [2023-08-04 07:05:15,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=39, PETRI_TRANSITIONS=29} [2023-08-04 07:05:15,625 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2023-08-04 07:05:15,625 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 29 transitions, 79 flow [2023-08-04 07:05:15,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:15,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:05:15,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:05:15,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 07:05:15,626 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:05:15,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:05:15,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1109943273, now seen corresponding path program 1 times [2023-08-04 07:05:15,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:05:15,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848785842] [2023-08-04 07:05:15,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:05:15,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:05:15,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:05:15,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:05:15,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:05:15,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848785842] [2023-08-04 07:05:15,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848785842] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:05:15,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883865154] [2023-08-04 07:05:15,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:05:15,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:05:15,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:05:15,796 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:05:15,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 07:05:15,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:05:15,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:05:15,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:05:15,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:05:15,977 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:05:15,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:05:15,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883865154] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:05:15,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:05:15,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:05:15,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159057036] [2023-08-04 07:05:15,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:05:15,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:05:15,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:05:15,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:05:15,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:05:16,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 277 [2023-08-04 07:05:16,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 29 transitions, 79 flow. Second operand has 5 states, 5 states have (on average 126.4) internal successors, (632), 5 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:16,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:05:16,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 277 [2023-08-04 07:05:16,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:05:16,039 INFO L124 PetriNetUnfolderBase]: 6/20 cut-off events. [2023-08-04 07:05:16,039 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 07:05:16,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 20 events. 6/20 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 4/24 useless extension candidates. Maximal degree in co-relation 51. Up to 14 conditions per place. [2023-08-04 07:05:16,040 INFO L140 encePairwiseOnDemand]: 274/277 looper letters, 0 selfloop transitions, 0 changer transitions 11/11 dead transitions. [2023-08-04 07:05:16,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 11 transitions, 53 flow [2023-08-04 07:05:16,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:05:16,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:05:16,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 508 transitions. [2023-08-04 07:05:16,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584837545126354 [2023-08-04 07:05:16,042 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 508 transitions. [2023-08-04 07:05:16,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 508 transitions. [2023-08-04 07:05:16,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:05:16,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 508 transitions. [2023-08-04 07:05:16,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:16,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 277.0) internal successors, (1385), 5 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:16,047 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 277.0) internal successors, (1385), 5 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:16,047 INFO L175 Difference]: Start difference. First operand has 39 places, 29 transitions, 79 flow. Second operand 4 states and 508 transitions. [2023-08-04 07:05:16,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 11 transitions, 53 flow [2023-08-04 07:05:16,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 11 transitions, 47 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 07:05:16,048 INFO L231 Difference]: Finished difference. Result has 15 places, 0 transitions, 0 flow [2023-08-04 07:05:16,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=15, PETRI_TRANSITIONS=0} [2023-08-04 07:05:16,049 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -21 predicate places. [2023-08-04 07:05:16,049 INFO L495 AbstractCegarLoop]: Abstraction has has 15 places, 0 transitions, 0 flow [2023-08-04 07:05:16,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 126.4) internal successors, (632), 5 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:16,052 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-04 07:05:16,053 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-04 07:05:16,053 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-04 07:05:16,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 07:05:16,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:05:16,260 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 07:05:16,262 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-04 07:05:16,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 146 transitions, 307 flow [2023-08-04 07:05:16,327 INFO L124 PetriNetUnfolderBase]: 30/465 cut-off events. [2023-08-04 07:05:16,327 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:05:16,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 490 conditions, 465 events. 30/465 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1935 event pairs, 0 based on Foata normal form. 0/411 useless extension candidates. Maximal degree in co-relation 286. Up to 16 conditions per place. [2023-08-04 07:05:16,329 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 146 transitions, 307 flow [2023-08-04 07:05:16,330 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 117 transitions, 249 flow [2023-08-04 07:05:16,330 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:05:16,330 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 117 transitions, 249 flow [2023-08-04 07:05:16,331 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 117 transitions, 249 flow [2023-08-04 07:05:16,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 117 transitions, 249 flow [2023-08-04 07:05:16,356 INFO L124 PetriNetUnfolderBase]: 6/233 cut-off events. [2023-08-04 07:05:16,357 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:05:16,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 233 events. 6/233 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 619 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 170. Up to 8 conditions per place. [2023-08-04 07:05:16,358 INFO L119 LiptonReduction]: Number of co-enabled transitions 1236 [2023-08-04 07:05:21,765 INFO L134 LiptonReduction]: Checked pairs total: 3120 [2023-08-04 07:05:21,766 INFO L136 LiptonReduction]: Total number of compositions: 98 [2023-08-04 07:05:21,767 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 07:05:21,768 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;@70ea654c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:05:21,768 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 07:05:21,773 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:05:21,773 INFO L124 PetriNetUnfolderBase]: 0/22 cut-off events. [2023-08-04 07:05:21,773 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:05:21,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:05:21,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 07:05:21,774 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 07:05:21,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:05:21,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1033356839, now seen corresponding path program 1 times [2023-08-04 07:05:21,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:05:21,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291800055] [2023-08-04 07:05:21,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:05:21,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:05:21,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:05:21,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 07:05:21,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:05:21,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291800055] [2023-08-04 07:05:21,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291800055] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:05:21,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:05:21,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:05:21,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992270797] [2023-08-04 07:05:21,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:05:21,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:05:21,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:05:21,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:05:21,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:05:21,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 244 [2023-08-04 07:05:21,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:21,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:05:21,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 244 [2023-08-04 07:05:21,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:05:22,029 INFO L124 PetriNetUnfolderBase]: 467/845 cut-off events. [2023-08-04 07:05:22,030 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 07:05:22,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1737 conditions, 845 events. 467/845 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3992 event pairs, 248 based on Foata normal form. 0/749 useless extension candidates. Maximal degree in co-relation 1716. Up to 760 conditions per place. [2023-08-04 07:05:22,034 INFO L140 encePairwiseOnDemand]: 241/244 looper letters, 23 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2023-08-04 07:05:22,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 29 transitions, 123 flow [2023-08-04 07:05:22,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:05:22,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:05:22,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 401 transitions. [2023-08-04 07:05:22,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5478142076502732 [2023-08-04 07:05:22,036 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 401 transitions. [2023-08-04 07:05:22,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 401 transitions. [2023-08-04 07:05:22,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:05:22,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 401 transitions. [2023-08-04 07:05:22,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:22,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 244.0) internal successors, (976), 4 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:22,040 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 244.0) internal successors, (976), 4 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:22,040 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 65 flow. Second operand 3 states and 401 transitions. [2023-08-04 07:05:22,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 29 transitions, 123 flow [2023-08-04 07:05:22,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 29 transitions, 123 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:05:22,041 INFO L231 Difference]: Finished difference. Result has 35 places, 25 transitions, 73 flow [2023-08-04 07:05:22,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=244, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=35, PETRI_TRANSITIONS=25} [2023-08-04 07:05:22,044 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-08-04 07:05:22,044 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 25 transitions, 73 flow [2023-08-04 07:05:22,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:22,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:05:22,045 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 07:05:22,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 07:05:22,045 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 07:05:22,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:05:22,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1022479375, now seen corresponding path program 1 times [2023-08-04 07:05:22,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:05:22,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183987145] [2023-08-04 07:05:22,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:05:22,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:05:22,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:05:22,067 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 07:05:22,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:05:22,112 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 07:05:22,113 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 07:05:22,113 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 07:05:22,113 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 07:05:22,114 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 07:05:22,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 07:05:22,114 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 07:05:22,115 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 07:05:22,115 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 07:05:22,116 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 07:05:22,164 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:05:22,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 169 transitions, 374 flow [2023-08-04 07:05:22,332 INFO L124 PetriNetUnfolderBase]: 93/1392 cut-off events. [2023-08-04 07:05:22,335 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 07:05:22,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1490 conditions, 1392 events. 93/1392 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 9369 event pairs, 0 based on Foata normal form. 0/1227 useless extension candidates. Maximal degree in co-relation 1015. Up to 54 conditions per place. [2023-08-04 07:05:22,343 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 169 transitions, 374 flow [2023-08-04 07:05:22,348 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 176 places, 168 transitions, 368 flow [2023-08-04 07:05:22,348 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:05:22,348 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 176 places, 168 transitions, 368 flow [2023-08-04 07:05:22,348 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 176 places, 168 transitions, 368 flow [2023-08-04 07:05:22,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 168 transitions, 368 flow [2023-08-04 07:05:22,488 INFO L124 PetriNetUnfolderBase]: 93/1391 cut-off events. [2023-08-04 07:05:22,489 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-04 07:05:22,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1487 conditions, 1391 events. 93/1391 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 9367 event pairs, 0 based on Foata normal form. 0/1226 useless extension candidates. Maximal degree in co-relation 1012. Up to 54 conditions per place. [2023-08-04 07:05:22,520 INFO L119 LiptonReduction]: Number of co-enabled transitions 5684 [2023-08-04 07:05:30,699 INFO L134 LiptonReduction]: Checked pairs total: 15518 [2023-08-04 07:05:30,699 INFO L136 LiptonReduction]: Total number of compositions: 138 [2023-08-04 07:05:30,701 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:05:30,702 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;@70ea654c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:05:30,702 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 07:05:30,704 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:05:30,704 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2023-08-04 07:05:30,704 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:05:30,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:05:30,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 07:05:30,705 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 07:05:30,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:05:30,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1317790722, now seen corresponding path program 1 times [2023-08-04 07:05:30,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:05:30,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21785529] [2023-08-04 07:05:30,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:05:30,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:05:30,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:05:30,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:05:30,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:05:30,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21785529] [2023-08-04 07:05:30,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21785529] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:05:30,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:05:30,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:05:30,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725105982] [2023-08-04 07:05:30,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:05:30,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:05:30,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:05:30,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:05:30,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:05:30,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 307 [2023-08-04 07:05:30,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 46 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:30,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:05:30,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 307 [2023-08-04 07:05:30,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:06:37,632 INFO L124 PetriNetUnfolderBase]: 363272/470023 cut-off events. [2023-08-04 07:06:37,633 INFO L125 PetriNetUnfolderBase]: For 8724/8724 co-relation queries the response was YES. [2023-08-04 07:06:38,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 936279 conditions, 470023 events. 363272/470023 cut-off events. For 8724/8724 co-relation queries the response was YES. Maximal size of possible extension queue 10633. Compared 3039472 event pairs, 293960 based on Foata normal form. 0/407234 useless extension candidates. Maximal degree in co-relation 202035. Up to 455689 conditions per place. [2023-08-04 07:06:40,517 INFO L140 encePairwiseOnDemand]: 304/307 looper letters, 42 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2023-08-04 07:06:40,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 51 transitions, 222 flow [2023-08-04 07:06:40,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:06:40,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:06:40,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 462 transitions. [2023-08-04 07:06:40,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.501628664495114 [2023-08-04 07:06:40,519 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 462 transitions. [2023-08-04 07:06:40,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 462 transitions. [2023-08-04 07:06:40,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:06:40,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 462 transitions. [2023-08-04 07:06:40,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:06:40,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:06:40,524 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:06:40,524 INFO L175 Difference]: Start difference. First operand has 59 places, 46 transitions, 124 flow. Second operand 3 states and 462 transitions. [2023-08-04 07:06:40,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 51 transitions, 222 flow [2023-08-04 07:06:40,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 51 transitions, 218 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-04 07:06:40,533 INFO L231 Difference]: Finished difference. Result has 62 places, 47 transitions, 132 flow [2023-08-04 07:06:40,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=62, PETRI_TRANSITIONS=47} [2023-08-04 07:06:40,534 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2023-08-04 07:06:40,534 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 47 transitions, 132 flow [2023-08-04 07:06:40,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:06:40,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:06:40,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:06:40,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 07:06:40,535 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 07:06:40,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:06:40,536 INFO L85 PathProgramCache]: Analyzing trace with hash 456269480, now seen corresponding path program 1 times [2023-08-04 07:06:40,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:06:40,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755060887] [2023-08-04 07:06:40,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:06:40,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:06:40,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:06:40,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:06:40,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:06:40,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755060887] [2023-08-04 07:06:40,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755060887] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:06:40,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842133822] [2023-08-04 07:06:40,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:06:40,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:06:40,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:06:40,589 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) [2023-08-04 07:06:40,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 07:06:40,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:06:40,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:06:40,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:06:40,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:06:40,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:06:40,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:06:40,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842133822] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:06:40,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:06:40,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:06:40,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874197262] [2023-08-04 07:06:40,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:06:40,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:06:40,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:06:40,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:06:40,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:06:40,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 307 [2023-08-04 07:06:40,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 47 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 140.4) internal successors, (702), 5 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:06:40,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:06:40,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 307 [2023-08-04 07:06:40,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:07:31,747 INFO L124 PetriNetUnfolderBase]: 301714/387141 cut-off events. [2023-08-04 07:07:31,747 INFO L125 PetriNetUnfolderBase]: For 6344/6344 co-relation queries the response was YES. [2023-08-04 07:07:32,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770694 conditions, 387141 events. 301714/387141 cut-off events. For 6344/6344 co-relation queries the response was YES. Maximal size of possible extension queue 9253. Compared 2402561 event pairs, 190828 based on Foata normal form. 4/336920 useless extension candidates. Maximal degree in co-relation 201906. Up to 375577 conditions per place. [2023-08-04 07:07:33,815 INFO L140 encePairwiseOnDemand]: 303/307 looper letters, 47 selfloop transitions, 3 changer transitions 1/58 dead transitions. [2023-08-04 07:07:33,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 58 transitions, 256 flow [2023-08-04 07:07:33,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:07:33,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:07:33,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 604 transitions. [2023-08-04 07:07:33,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49185667752442996 [2023-08-04 07:07:33,821 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 604 transitions. [2023-08-04 07:07:33,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 604 transitions. [2023-08-04 07:07:33,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:07:33,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 604 transitions. [2023-08-04 07:07:33,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:33,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 307.0) internal successors, (1535), 5 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:33,826 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 307.0) internal successors, (1535), 5 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:33,826 INFO L175 Difference]: Start difference. First operand has 62 places, 47 transitions, 132 flow. Second operand 4 states and 604 transitions. [2023-08-04 07:07:33,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 58 transitions, 256 flow [2023-08-04 07:07:33,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 58 transitions, 254 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:07:33,828 INFO L231 Difference]: Finished difference. Result has 66 places, 47 transitions, 144 flow [2023-08-04 07:07:33,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=144, PETRI_PLACES=66, PETRI_TRANSITIONS=47} [2023-08-04 07:07:33,829 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 7 predicate places. [2023-08-04 07:07:33,829 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 47 transitions, 144 flow [2023-08-04 07:07:33,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 140.4) internal successors, (702), 5 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:33,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:07:33,830 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:07:33,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 07:07:34,035 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,SelfDestructingSolverStorable5 [2023-08-04 07:07:34,035 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 07:07:34,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:07:34,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1808477809, now seen corresponding path program 1 times [2023-08-04 07:07:34,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:07:34,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807331406] [2023-08-04 07:07:34,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:07:34,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:07:34,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:07:34,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 07:07:34,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:07:34,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807331406] [2023-08-04 07:07:34,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807331406] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:07:34,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:07:34,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 07:07:34,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283684458] [2023-08-04 07:07:34,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:07:34,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:07:34,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:07:34,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:07:34,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:07:34,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 307 [2023-08-04 07:07:34,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 47 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:34,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:07:34,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 307 [2023-08-04 07:07:34,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand