/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_queue_ok_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 07:50:55,696 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 07:50:55,750 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 07:50:55,754 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 07:50:55,754 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 07:50:55,754 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 07:50:55,755 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 07:50:55,789 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 07:50:55,789 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 07:50:55,789 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 07:50:55,790 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 07:50:55,790 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 07:50:55,791 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 07:50:55,791 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 07:50:55,791 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 07:50:55,792 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 07:50:55,792 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 07:50:55,792 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 07:50:55,795 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 07:50:55,795 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 07:50:55,799 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 07:50:55,799 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 07:50:55,799 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 07:50:55,800 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 07:50:55,801 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 07:50:55,801 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 07:50:55,801 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 07:50:55,801 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 07:50:55,802 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 07:50:55,802 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 07:50:55,803 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:50:55,803 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 07:50:55,803 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 07:50:55,803 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 07:50:55,803 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 07:50:55,804 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 07:50:55,804 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 07:50:55,804 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 07:50:55,804 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 07:50:55,804 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 07:50:55,804 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 07:50:55,805 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 07:50:56,026 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 07:50:56,049 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 07:50:56,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 07:50:56,053 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 07:50:56,053 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 07:50:56,054 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread_queue_ok_bound2.i [2023-08-04 07:50:57,206 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 07:50:57,453 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 07:50:57,454 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread_queue_ok_bound2.i [2023-08-04 07:50:57,466 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3657fb4d/5f2cdb1724d34e28b14dc2cdb5b62ee9/FLAG938d23b3c [2023-08-04 07:50:57,478 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3657fb4d/5f2cdb1724d34e28b14dc2cdb5b62ee9 [2023-08-04 07:50:57,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 07:50:57,481 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 07:50:57,482 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 07:50:57,482 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 07:50:57,486 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 07:50:57,487 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:50:57" (1/1) ... [2023-08-04 07:50:57,487 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6630642a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:57, skipping insertion in model container [2023-08-04 07:50:57,488 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:50:57" (1/1) ... [2023-08-04 07:50:57,543 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 07:50:57,926 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_queue_ok_bound2.i[43266,43279] [2023-08-04 07:50:57,931 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_queue_ok_bound2.i[43549,43562] [2023-08-04 07:50:57,935 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:50:57,946 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 07:50:57,971 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [258] [2023-08-04 07:50:57,973 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [258] [2023-08-04 07:50:57,988 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [750] [2023-08-04 07:50:57,999 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_queue_ok_bound2.i[43266,43279] [2023-08-04 07:50:58,004 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_queue_ok_bound2.i[43549,43562] [2023-08-04 07:50:58,012 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:50:58,074 INFO L206 MainTranslator]: Completed translation [2023-08-04 07:50:58,076 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:58 WrapperNode [2023-08-04 07:50:58,077 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 07:50:58,078 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 07:50:58,078 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 07:50:58,078 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 07:50:58,084 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:58" (1/1) ... [2023-08-04 07:50:58,114 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:58" (1/1) ... [2023-08-04 07:50:58,156 INFO L138 Inliner]: procedures = 274, calls = 57, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 235 [2023-08-04 07:50:58,157 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 07:50:58,157 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 07:50:58,157 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 07:50:58,157 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 07:50:58,165 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:58" (1/1) ... [2023-08-04 07:50:58,165 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:58" (1/1) ... [2023-08-04 07:50:58,178 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:58" (1/1) ... [2023-08-04 07:50:58,179 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:58" (1/1) ... [2023-08-04 07:50:58,196 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:58" (1/1) ... [2023-08-04 07:50:58,199 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:58" (1/1) ... [2023-08-04 07:50:58,201 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:58" (1/1) ... [2023-08-04 07:50:58,202 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:58" (1/1) ... [2023-08-04 07:50:58,205 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 07:50:58,206 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 07:50:58,206 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 07:50:58,208 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 07:50:58,208 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:58" (1/1) ... [2023-08-04 07:50:58,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:50:58,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:50:58,252 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 07:50:58,257 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 07:50:58,281 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-04 07:50:58,281 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-04 07:50:58,282 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-04 07:50:58,282 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-04 07:50:58,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 07:50:58,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 07:50:58,282 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 07:50:58,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 07:50:58,282 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-04 07:50:58,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 07:50:58,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 07:50:58,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 07:50:58,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 07:50:58,284 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 07:50:58,405 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 07:50:58,407 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 07:50:58,719 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 07:50:58,726 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 07:50:58,726 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-04 07:50:58,728 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:50:58 BoogieIcfgContainer [2023-08-04 07:50:58,728 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 07:50:58,730 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 07:50:58,730 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 07:50:58,732 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 07:50:58,732 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 07:50:57" (1/3) ... [2023-08-04 07:50:58,733 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@99c7367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:50:58, skipping insertion in model container [2023-08-04 07:50:58,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:58" (2/3) ... [2023-08-04 07:50:58,733 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@99c7367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:50:58, skipping insertion in model container [2023-08-04 07:50:58,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:50:58" (3/3) ... [2023-08-04 07:50:58,734 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread_queue_ok_bound2.i [2023-08-04 07:50:58,741 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 07:50:58,748 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 07:50:58,748 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-04 07:50:58,749 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 07:50:58,833 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 07:50:58,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 246 transitions, 514 flow [2023-08-04 07:50:58,993 INFO L124 PetriNetUnfolderBase]: 42/427 cut-off events. [2023-08-04 07:50:58,998 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 07:50:59,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 427 events. 42/427 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1542 event pairs, 0 based on Foata normal form. 0/376 useless extension candidates. Maximal degree in co-relation 213. Up to 8 conditions per place. [2023-08-04 07:50:59,011 INFO L82 GeneralOperation]: Start removeDead. Operand has 230 places, 246 transitions, 514 flow [2023-08-04 07:50:59,018 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 230 places, 246 transitions, 514 flow [2023-08-04 07:50:59,020 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:50:59,028 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 230 places, 246 transitions, 514 flow [2023-08-04 07:50:59,030 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 230 places, 246 transitions, 514 flow [2023-08-04 07:50:59,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 246 transitions, 514 flow [2023-08-04 07:50:59,093 INFO L124 PetriNetUnfolderBase]: 42/427 cut-off events. [2023-08-04 07:50:59,093 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 07:50:59,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 427 events. 42/427 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1542 event pairs, 0 based on Foata normal form. 0/376 useless extension candidates. Maximal degree in co-relation 213. Up to 8 conditions per place. [2023-08-04 07:50:59,108 INFO L119 LiptonReduction]: Number of co-enabled transitions 19708 [2023-08-04 07:51:05,413 INFO L134 LiptonReduction]: Checked pairs total: 40136 [2023-08-04 07:51:05,413 INFO L136 LiptonReduction]: Total number of compositions: 216 [2023-08-04 07:51:05,425 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:51:05,429 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;@64eb2ff8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:51:05,430 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 07:51:05,431 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:51:05,431 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-04 07:51:05,431 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:51:05,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:51:05,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-04 07:51:05,432 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:51:05,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:51:05,436 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2023-08-04 07:51:05,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:51:05,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647261485] [2023-08-04 07:51:05,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:51:05,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:51:05,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:51:05,520 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 07:51:05,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:51:05,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647261485] [2023-08-04 07:51:05,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647261485] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:51:05,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:51:05,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-04 07:51:05,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243980611] [2023-08-04 07:51:05,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:51:05,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-04 07:51:05,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:51:05,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-04 07:51:05,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-04 07:51:05,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 462 [2023-08-04 07:51:05,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 63 transitions, 148 flow. Second operand has 2 states, 2 states have (on average 229.5) internal successors, (459), 2 states have internal predecessors, (459), 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 07:51:05,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:51:05,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 462 [2023-08-04 07:51:05,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:51:06,133 INFO L124 PetriNetUnfolderBase]: 4106/6392 cut-off events. [2023-08-04 07:51:06,133 INFO L125 PetriNetUnfolderBase]: For 162/162 co-relation queries the response was YES. [2023-08-04 07:51:06,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12590 conditions, 6392 events. 4106/6392 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 35146 event pairs, 3168 based on Foata normal form. 0/4871 useless extension candidates. Maximal degree in co-relation 11734. Up to 6087 conditions per place. [2023-08-04 07:51:06,164 INFO L140 encePairwiseOnDemand]: 461/462 looper letters, 48 selfloop transitions, 0 changer transitions 4/62 dead transitions. [2023-08-04 07:51:06,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 62 transitions, 248 flow [2023-08-04 07:51:06,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-04 07:51:06,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-04 07:51:06,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 510 transitions. [2023-08-04 07:51:06,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551948051948052 [2023-08-04 07:51:06,183 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 510 transitions. [2023-08-04 07:51:06,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 510 transitions. [2023-08-04 07:51:06,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:51:06,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 510 transitions. [2023-08-04 07:51:06,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 255.0) internal successors, (510), 2 states have internal predecessors, (510), 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 07:51:06,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 462.0) internal successors, (1386), 3 states have internal predecessors, (1386), 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 07:51:06,198 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 462.0) internal successors, (1386), 3 states have internal predecessors, (1386), 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 07:51:06,199 INFO L175 Difference]: Start difference. First operand has 57 places, 63 transitions, 148 flow. Second operand 2 states and 510 transitions. [2023-08-04 07:51:06,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 62 transitions, 248 flow [2023-08-04 07:51:06,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 62 transitions, 248 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:51:06,206 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 130 flow [2023-08-04 07:51:06,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=130, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2023-08-04 07:51:06,211 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 0 predicate places. [2023-08-04 07:51:06,211 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 130 flow [2023-08-04 07:51:06,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 229.5) internal successors, (459), 2 states have internal predecessors, (459), 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 07:51:06,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:51:06,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:51:06,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 07:51:06,212 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [t2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:51:06,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:51:06,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1221190258, now seen corresponding path program 1 times [2023-08-04 07:51:06,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:51:06,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697881496] [2023-08-04 07:51:06,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:51:06,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:51:06,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:51:06,432 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 07:51:06,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:51:06,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697881496] [2023-08-04 07:51:06,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697881496] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:51:06,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:51:06,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:51:06,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112487308] [2023-08-04 07:51:06,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:51:06,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:51:06,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:51:06,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:51:06,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:51:06,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 462 [2023-08-04 07:51:06,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 58 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 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 07:51:06,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:51:06,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 462 [2023-08-04 07:51:06,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:51:06,887 INFO L124 PetriNetUnfolderBase]: 3536/5498 cut-off events. [2023-08-04 07:51:06,888 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2023-08-04 07:51:06,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10908 conditions, 5498 events. 3536/5498 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 29105 event pairs, 2396 based on Foata normal form. 0/4121 useless extension candidates. Maximal degree in co-relation 10903. Up to 5317 conditions per place. [2023-08-04 07:51:06,917 INFO L140 encePairwiseOnDemand]: 459/462 looper letters, 61 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2023-08-04 07:51:06,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 73 transitions, 286 flow [2023-08-04 07:51:06,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:51:06,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:51:06,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 739 transitions. [2023-08-04 07:51:06,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331890331890332 [2023-08-04 07:51:06,920 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 739 transitions. [2023-08-04 07:51:06,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 739 transitions. [2023-08-04 07:51:06,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:51:06,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 739 transitions. [2023-08-04 07:51:06,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 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 07:51:06,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 462.0) internal successors, (1848), 4 states have internal predecessors, (1848), 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 07:51:06,927 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 462.0) internal successors, (1848), 4 states have internal predecessors, (1848), 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 07:51:06,928 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 130 flow. Second operand 3 states and 739 transitions. [2023-08-04 07:51:06,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 73 transitions, 286 flow [2023-08-04 07:51:06,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 73 transitions, 283 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:51:06,936 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 135 flow [2023-08-04 07:51:06,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2023-08-04 07:51:06,937 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 0 predicate places. [2023-08-04 07:51:06,937 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 135 flow [2023-08-04 07:51:06,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 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 07:51:06,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:51:06,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:51:06,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 07:51:06,938 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [t2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:51:06,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:51:06,942 INFO L85 PathProgramCache]: Analyzing trace with hash 858716405, now seen corresponding path program 1 times [2023-08-04 07:51:06,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:51:06,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996764677] [2023-08-04 07:51:06,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:51:06,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:51:06,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:51:07,076 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 07:51:07,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:51:07,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996764677] [2023-08-04 07:51:07,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996764677] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:51:07,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777056020] [2023-08-04 07:51:07,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:51:07,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:51:07,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:51:07,084 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 07:51:07,111 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 07:51:07,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:51:07,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:51:07,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:51:07,274 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 07:51:07,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:51:07,311 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 07:51:07,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777056020] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:51:07,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:51:07,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:51:07,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937848741] [2023-08-04 07:51:07,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:51:07,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:51:07,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:51:07,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:51:07,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:51:07,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 462 [2023-08-04 07:51:07,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 58 transitions, 135 flow. Second operand has 5 states, 5 states have (on average 228.4) internal successors, (1142), 5 states have internal predecessors, (1142), 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 07:51:07,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:51:07,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 462 [2023-08-04 07:51:07,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:51:07,377 INFO L124 PetriNetUnfolderBase]: 31/75 cut-off events. [2023-08-04 07:51:07,378 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-04 07:51:07,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 75 events. 31/75 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 209 event pairs, 0 based on Foata normal form. 13/81 useless extension candidates. Maximal degree in co-relation 174. Up to 54 conditions per place. [2023-08-04 07:51:07,379 INFO L140 encePairwiseOnDemand]: 459/462 looper letters, 0 selfloop transitions, 0 changer transitions 37/37 dead transitions. [2023-08-04 07:51:07,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 37 transitions, 148 flow [2023-08-04 07:51:07,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:51:07,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:51:07,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 930 transitions. [2023-08-04 07:51:07,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5032467532467533 [2023-08-04 07:51:07,382 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 930 transitions. [2023-08-04 07:51:07,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 930 transitions. [2023-08-04 07:51:07,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:51:07,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 930 transitions. [2023-08-04 07:51:07,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 232.5) internal successors, (930), 4 states have internal predecessors, (930), 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 07:51:07,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 462.0) internal successors, (2310), 5 states have internal predecessors, (2310), 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 07:51:07,389 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 462.0) internal successors, (2310), 5 states have internal predecessors, (2310), 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 07:51:07,389 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 135 flow. Second operand 4 states and 930 transitions. [2023-08-04 07:51:07,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 37 transitions, 148 flow [2023-08-04 07:51:07,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 37 transitions, 142 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 07:51:07,392 INFO L231 Difference]: Finished difference. Result has 26 places, 0 transitions, 0 flow [2023-08-04 07:51:07,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=26, PETRI_TRANSITIONS=0} [2023-08-04 07:51:07,393 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -31 predicate places. [2023-08-04 07:51:07,394 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 0 transitions, 0 flow [2023-08-04 07:51:07,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 228.4) internal successors, (1142), 5 states have internal predecessors, (1142), 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 07:51:07,397 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-04 07:51:07,397 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-04 07:51:07,397 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-04 07:51:07,406 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 07:51:07,603 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 [2023-08-04 07:51:07,604 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-04 07:51:07,606 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-04 07:51:07,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 246 transitions, 514 flow [2023-08-04 07:51:07,651 INFO L124 PetriNetUnfolderBase]: 42/427 cut-off events. [2023-08-04 07:51:07,651 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 07:51:07,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 427 events. 42/427 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1542 event pairs, 0 based on Foata normal form. 0/376 useless extension candidates. Maximal degree in co-relation 213. Up to 8 conditions per place. [2023-08-04 07:51:07,653 INFO L82 GeneralOperation]: Start removeDead. Operand has 230 places, 246 transitions, 514 flow [2023-08-04 07:51:07,655 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 229 places, 245 transitions, 512 flow [2023-08-04 07:51:07,655 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:51:07,655 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 229 places, 245 transitions, 512 flow [2023-08-04 07:51:07,656 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 229 places, 245 transitions, 512 flow [2023-08-04 07:51:07,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 245 transitions, 512 flow [2023-08-04 07:51:07,696 INFO L124 PetriNetUnfolderBase]: 42/426 cut-off events. [2023-08-04 07:51:07,696 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 07:51:07,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 446 conditions, 426 events. 42/426 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1539 event pairs, 0 based on Foata normal form. 0/376 useless extension candidates. Maximal degree in co-relation 212. Up to 8 conditions per place. [2023-08-04 07:51:07,708 INFO L119 LiptonReduction]: Number of co-enabled transitions 19708 [2023-08-04 07:51:13,884 INFO L134 LiptonReduction]: Checked pairs total: 40247 [2023-08-04 07:51:13,884 INFO L136 LiptonReduction]: Total number of compositions: 219 [2023-08-04 07:51:13,886 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 07:51:13,886 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;@64eb2ff8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:51:13,886 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 07:51:13,889 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:51:13,890 INFO L124 PetriNetUnfolderBase]: 1/29 cut-off events. [2023-08-04 07:51:13,890 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:51:13,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:51:13,890 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 07:51:13,890 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 07:51:13,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:51:13,890 INFO L85 PathProgramCache]: Analyzing trace with hash 539329285, now seen corresponding path program 1 times [2023-08-04 07:51:13,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:51:13,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042053972] [2023-08-04 07:51:13,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:51:13,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:51:13,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:51:13,908 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 07:51:13,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:51:13,932 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 07:51:13,933 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 07:51:13,933 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 07:51:13,933 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 07:51:13,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 07:51:13,933 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 07:51:13,934 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 07:51:13,934 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 07:51:13,934 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 07:51:13,975 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 07:51:13,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 355 places, 382 transitions, 812 flow [2023-08-04 07:51:14,167 INFO L124 PetriNetUnfolderBase]: 153/1208 cut-off events. [2023-08-04 07:51:14,167 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 07:51:14,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1305 conditions, 1208 events. 153/1208 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 7447 event pairs, 2 based on Foata normal form. 0/1061 useless extension candidates. Maximal degree in co-relation 760. Up to 32 conditions per place. [2023-08-04 07:51:14,180 INFO L82 GeneralOperation]: Start removeDead. Operand has 355 places, 382 transitions, 812 flow [2023-08-04 07:51:14,189 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 355 places, 382 transitions, 812 flow [2023-08-04 07:51:14,191 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:51:14,191 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 355 places, 382 transitions, 812 flow [2023-08-04 07:51:14,191 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 355 places, 382 transitions, 812 flow [2023-08-04 07:51:14,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 355 places, 382 transitions, 812 flow [2023-08-04 07:51:14,355 INFO L124 PetriNetUnfolderBase]: 153/1208 cut-off events. [2023-08-04 07:51:14,355 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 07:51:14,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1305 conditions, 1208 events. 153/1208 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 7447 event pairs, 2 based on Foata normal form. 0/1061 useless extension candidates. Maximal degree in co-relation 760. Up to 32 conditions per place. [2023-08-04 07:51:14,435 INFO L119 LiptonReduction]: Number of co-enabled transitions 75764 [2023-08-04 07:51:20,551 INFO L134 LiptonReduction]: Checked pairs total: 166293 [2023-08-04 07:51:20,551 INFO L136 LiptonReduction]: Total number of compositions: 328 [2023-08-04 07:51:20,553 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:51:20,554 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;@64eb2ff8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:51:20,554 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 07:51:20,555 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:51:20,555 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-04 07:51:20,555 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:51:20,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:51:20,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-04 07:51:20,555 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 07:51:20,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:51:20,556 INFO L85 PathProgramCache]: Analyzing trace with hash 2027, now seen corresponding path program 1 times [2023-08-04 07:51:20,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:51:20,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631386339] [2023-08-04 07:51:20,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:51:20,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:51:20,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:51:20,560 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 07:51:20,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:51:20,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631386339] [2023-08-04 07:51:20,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631386339] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:51:20,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:51:20,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-04 07:51:20,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164804597] [2023-08-04 07:51:20,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:51:20,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-04 07:51:20,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:51:20,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-04 07:51:20,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-04 07:51:20,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 355 out of 710 [2023-08-04 07:51:20,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 110 transitions, 268 flow. Second operand has 2 states, 2 states have (on average 355.5) internal successors, (711), 2 states have internal predecessors, (711), 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 07:51:20,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:51:20,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 355 of 710 [2023-08-04 07:51:20,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand