/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/weaver_parallel-parallel-sum-1.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:55:02,408 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:55:02,489 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:55:02,496 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:55:02,497 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:55:02,497 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:55:02,498 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:55:02,528 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:55:02,529 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:55:02,533 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:55:02,533 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:55:02,534 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:55:02,534 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:55:02,536 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:55:02,536 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:55:02,536 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:55:02,536 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:55:02,536 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:55:02,537 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:55:02,537 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:55:02,537 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:55:02,537 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:55:02,537 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:55:02,538 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:55:02,539 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:55:02,539 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:55:02,539 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:55:02,540 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:55:02,540 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:55:02,540 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:55:02,541 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:55:02,541 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:55:02,541 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:55:02,541 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:55:02,541 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:55:02,542 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:55:02,542 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:55:02,542 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:55:02,542 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:55:02,542 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:55:02,542 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:55:02,543 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:55:02,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:55:02,733 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:55:02,735 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:55:02,736 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:55:02,736 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:55:02,737 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-parallel-sum-1.wvr_bound2.c [2023-08-04 08:55:03,726 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:55:03,929 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:55:03,929 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-parallel-sum-1.wvr_bound2.c [2023-08-04 08:55:03,937 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1f3ce37f/fd261e0aeb634edc9408f6977c9a18dd/FLAG1726baa01 [2023-08-04 08:55:03,950 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1f3ce37f/fd261e0aeb634edc9408f6977c9a18dd [2023-08-04 08:55:03,953 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:55:03,955 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:55:03,957 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:55:03,957 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:55:03,959 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:55:03,959 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:55:03" (1/1) ... [2023-08-04 08:55:03,960 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a1a875d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:55:03, skipping insertion in model container [2023-08-04 08:55:03,960 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:55:03" (1/1) ... [2023-08-04 08:55:03,984 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:55:04,139 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-parallel-sum-1.wvr_bound2.c[3966,3979] [2023-08-04 08:55:04,145 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:55:04,152 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:55:04,179 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-parallel-sum-1.wvr_bound2.c[3966,3979] [2023-08-04 08:55:04,183 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:55:04,189 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 08:55:04,190 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 08:55:04,195 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:55:04,195 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:55:04 WrapperNode [2023-08-04 08:55:04,195 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:55:04,196 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:55:04,196 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:55:04,197 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:55:04,202 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:55:04" (1/1) ... [2023-08-04 08:55:04,210 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:55:04" (1/1) ... [2023-08-04 08:55:04,243 INFO L138 Inliner]: procedures = 27, calls = 68, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 375 [2023-08-04 08:55:04,243 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:55:04,244 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:55:04,244 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:55:04,244 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:55:04,252 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:55:04" (1/1) ... [2023-08-04 08:55:04,252 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:55:04" (1/1) ... [2023-08-04 08:55:04,256 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:55:04" (1/1) ... [2023-08-04 08:55:04,256 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:55:04" (1/1) ... [2023-08-04 08:55:04,264 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:55:04" (1/1) ... [2023-08-04 08:55:04,268 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:55:04" (1/1) ... [2023-08-04 08:55:04,270 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:55:04" (1/1) ... [2023-08-04 08:55:04,272 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:55:04" (1/1) ... [2023-08-04 08:55:04,275 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:55:04,276 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:55:04,276 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:55:04,276 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:55:04,277 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:55:04" (1/1) ... [2023-08-04 08:55:04,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:55:04,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:55:04,311 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 08:55:04,321 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 08:55:04,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:55:04,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:55:04,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:55:04,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:55:04,340 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:55:04,340 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:55:04,340 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:55:04,340 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:55:04,340 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 08:55:04,342 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 08:55:04,342 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-04 08:55:04,342 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-04 08:55:04,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:55:04,342 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 08:55:04,342 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 08:55:04,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 08:55:04,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:55:04,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:55:04,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:55:04,344 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 08:55:04,442 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:55:04,443 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:55:04,938 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:55:05,078 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:55:05,078 INFO L302 CfgBuilder]: Removed 13 assume(true) statements. [2023-08-04 08:55:05,080 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:55:05 BoogieIcfgContainer [2023-08-04 08:55:05,080 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:55:05,081 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:55:05,081 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:55:05,084 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:55:05,084 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:55:03" (1/3) ... [2023-08-04 08:55:05,085 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37802472 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:55:05, skipping insertion in model container [2023-08-04 08:55:05,085 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:55:04" (2/3) ... [2023-08-04 08:55:05,085 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37802472 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:55:05, skipping insertion in model container [2023-08-04 08:55:05,085 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:55:05" (3/3) ... [2023-08-04 08:55:05,086 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_parallel-parallel-sum-1.wvr_bound2.c [2023-08-04 08:55:05,092 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:55:05,099 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:55:05,100 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:55:05,100 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:55:05,163 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2023-08-04 08:55:05,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 244 places, 274 transitions, 616 flow [2023-08-04 08:55:05,465 INFO L124 PetriNetUnfolderBase]: 274/1564 cut-off events. [2023-08-04 08:55:05,465 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 08:55:05,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1742 conditions, 1564 events. 274/1564 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 10099 event pairs, 0 based on Foata normal form. 0/1308 useless extension candidates. Maximal degree in co-relation 921. Up to 33 conditions per place. [2023-08-04 08:55:05,479 INFO L82 GeneralOperation]: Start removeDead. Operand has 244 places, 274 transitions, 616 flow [2023-08-04 08:55:05,494 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 244 places, 274 transitions, 616 flow [2023-08-04 08:55:05,497 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:55:05,508 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 244 places, 274 transitions, 616 flow [2023-08-04 08:55:05,513 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 244 places, 274 transitions, 616 flow [2023-08-04 08:55:05,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 244 places, 274 transitions, 616 flow [2023-08-04 08:55:05,707 INFO L124 PetriNetUnfolderBase]: 274/1564 cut-off events. [2023-08-04 08:55:05,707 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 08:55:05,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1742 conditions, 1564 events. 274/1564 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 10099 event pairs, 0 based on Foata normal form. 0/1308 useless extension candidates. Maximal degree in co-relation 921. Up to 33 conditions per place. [2023-08-04 08:55:05,742 INFO L119 LiptonReduction]: Number of co-enabled transitions 9280 [2023-08-04 08:55:12,391 INFO L134 LiptonReduction]: Checked pairs total: 22379 [2023-08-04 08:55:12,391 INFO L136 LiptonReduction]: Total number of compositions: 241 [2023-08-04 08:55:12,400 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:55:12,404 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;@76ed897d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:55:12,404 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:55:12,410 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:55:12,410 INFO L124 PetriNetUnfolderBase]: 6/69 cut-off events. [2023-08-04 08:55:12,410 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:55:12,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:55:12,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:55:12,411 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:55:12,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:55:12,414 INFO L85 PathProgramCache]: Analyzing trace with hash 101256424, now seen corresponding path program 1 times [2023-08-04 08:55:12,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:55:12,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185787040] [2023-08-04 08:55:12,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:55:12,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:55:12,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:55:12,634 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 08:55:12,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:55:12,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185787040] [2023-08-04 08:55:12,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185787040] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:55:12,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:55:12,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:55:12,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909059093] [2023-08-04 08:55:12,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:55:12,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:55:12,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:55:12,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:55:12,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:55:12,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 515 [2023-08-04 08:55:12,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 68 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 226.33333333333334) internal successors, (679), 3 states have internal predecessors, (679), 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 08:55:12,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:55:12,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 515 [2023-08-04 08:55:12,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:55:13,944 INFO L124 PetriNetUnfolderBase]: 11681/16162 cut-off events. [2023-08-04 08:55:13,945 INFO L125 PetriNetUnfolderBase]: For 1368/1368 co-relation queries the response was YES. [2023-08-04 08:55:13,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32782 conditions, 16162 events. 11681/16162 cut-off events. For 1368/1368 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 80272 event pairs, 5190 based on Foata normal form. 0/11266 useless extension candidates. Maximal degree in co-relation 25878. Up to 15385 conditions per place. [2023-08-04 08:55:14,031 INFO L140 encePairwiseOnDemand]: 511/515 looper letters, 60 selfloop transitions, 2 changer transitions 5/71 dead transitions. [2023-08-04 08:55:14,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 71 transitions, 336 flow [2023-08-04 08:55:14,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:55:14,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:55:14,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 734 transitions. [2023-08-04 08:55:14,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47508090614886733 [2023-08-04 08:55:14,049 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 734 transitions. [2023-08-04 08:55:14,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 734 transitions. [2023-08-04 08:55:14,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:55:14,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 734 transitions. [2023-08-04 08:55:14,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 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 08:55:14,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 515.0) internal successors, (2060), 4 states have internal predecessors, (2060), 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 08:55:14,068 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 515.0) internal successors, (2060), 4 states have internal predecessors, (2060), 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 08:55:14,070 INFO L175 Difference]: Start difference. First operand has 56 places, 68 transitions, 204 flow. Second operand 3 states and 734 transitions. [2023-08-04 08:55:14,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 71 transitions, 336 flow [2023-08-04 08:55:14,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 336 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:55:14,082 INFO L231 Difference]: Finished difference. Result has 58 places, 63 transitions, 194 flow [2023-08-04 08:55:14,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=515, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=58, PETRI_TRANSITIONS=63} [2023-08-04 08:55:14,088 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2023-08-04 08:55:14,088 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 63 transitions, 194 flow [2023-08-04 08:55:14,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 226.33333333333334) internal successors, (679), 3 states have internal predecessors, (679), 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 08:55:14,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:55:14,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:55:14,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:55:14,090 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:55:14,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:55:14,095 INFO L85 PathProgramCache]: Analyzing trace with hash 547599998, now seen corresponding path program 1 times [2023-08-04 08:55:14,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:55:14,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699127583] [2023-08-04 08:55:14,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:55:14,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:55:14,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:55:14,211 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 08:55:14,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:55:14,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699127583] [2023-08-04 08:55:14,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699127583] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:55:14,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695841400] [2023-08-04 08:55:14,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:55:14,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:55:14,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:55:14,215 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 08:55:14,216 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 08:55:14,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:55:14,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:55:14,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:55:14,307 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 08:55:14,308 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:55:14,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695841400] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:55:14,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:55:14,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:55:14,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174156381] [2023-08-04 08:55:14,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:55:14,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:55:14,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:55:14,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:55:14,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:55:14,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 515 [2023-08-04 08:55:14,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 63 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 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 08:55:14,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:55:14,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 515 [2023-08-04 08:55:14,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:55:15,265 INFO L124 PetriNetUnfolderBase]: 11264/15508 cut-off events. [2023-08-04 08:55:15,266 INFO L125 PetriNetUnfolderBase]: For 1309/1309 co-relation queries the response was YES. [2023-08-04 08:55:15,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31456 conditions, 15508 events. 11264/15508 cut-off events. For 1309/1309 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 75692 event pairs, 5084 based on Foata normal form. 0/10812 useless extension candidates. Maximal degree in co-relation 24555. Up to 14776 conditions per place. [2023-08-04 08:55:15,324 INFO L140 encePairwiseOnDemand]: 512/515 looper letters, 63 selfloop transitions, 2 changer transitions 1/70 dead transitions. [2023-08-04 08:55:15,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 70 transitions, 340 flow [2023-08-04 08:55:15,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:55:15,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:55:15,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 736 transitions. [2023-08-04 08:55:15,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47637540453074434 [2023-08-04 08:55:15,327 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 736 transitions. [2023-08-04 08:55:15,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 736 transitions. [2023-08-04 08:55:15,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:55:15,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 736 transitions. [2023-08-04 08:55:15,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 245.33333333333334) internal successors, (736), 3 states have internal predecessors, (736), 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 08:55:15,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 515.0) internal successors, (2060), 4 states have internal predecessors, (2060), 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 08:55:15,331 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 515.0) internal successors, (2060), 4 states have internal predecessors, (2060), 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 08:55:15,332 INFO L175 Difference]: Start difference. First operand has 58 places, 63 transitions, 194 flow. Second operand 3 states and 736 transitions. [2023-08-04 08:55:15,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 70 transitions, 340 flow [2023-08-04 08:55:15,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 70 transitions, 316 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-04 08:55:15,337 INFO L231 Difference]: Finished difference. Result has 51 places, 63 transitions, 178 flow [2023-08-04 08:55:15,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=515, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=51, PETRI_TRANSITIONS=63} [2023-08-04 08:55:15,338 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -5 predicate places. [2023-08-04 08:55:15,338 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 63 transitions, 178 flow [2023-08-04 08:55:15,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 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 08:55:15,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:55:15,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:55:15,347 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 08:55:15,543 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 08:55:15,543 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:55:15,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:55:15,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1252513036, now seen corresponding path program 1 times [2023-08-04 08:55:15,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:55:15,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389786697] [2023-08-04 08:55:15,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:55:15,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:55:15,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:55:15,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:55:15,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:55:15,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389786697] [2023-08-04 08:55:15,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389786697] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:55:15,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955137145] [2023-08-04 08:55:15,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:55:15,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:55:15,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:55:15,623 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 08:55:15,626 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 08:55:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:55:15,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:55:15,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:55:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:55:15,717 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:55:15,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955137145] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:55:15,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:55:15,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:55:15,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762383492] [2023-08-04 08:55:15,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:55:15,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:55:15,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:55:15,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:55:15,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:55:15,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 515 [2023-08-04 08:55:15,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 63 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 228.33333333333334) internal successors, (685), 3 states have internal predecessors, (685), 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 08:55:15,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:55:15,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 515 [2023-08-04 08:55:15,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:55:16,523 INFO L124 PetriNetUnfolderBase]: 10967/15112 cut-off events. [2023-08-04 08:55:16,524 INFO L125 PetriNetUnfolderBase]: For 127/127 co-relation queries the response was YES. [2023-08-04 08:55:16,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30633 conditions, 15112 events. 10967/15112 cut-off events. For 127/127 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 73022 event pairs, 5002 based on Foata normal form. 0/10563 useless extension candidates. Maximal degree in co-relation 13042. Up to 14269 conditions per place. [2023-08-04 08:55:16,572 INFO L140 encePairwiseOnDemand]: 512/515 looper letters, 66 selfloop transitions, 2 changer transitions 1/73 dead transitions. [2023-08-04 08:55:16,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 73 transitions, 336 flow [2023-08-04 08:55:16,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:55:16,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:55:16,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 739 transitions. [2023-08-04 08:55:16,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47831715210355985 [2023-08-04 08:55:16,574 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 739 transitions. [2023-08-04 08:55:16,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 739 transitions. [2023-08-04 08:55:16,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:55:16,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 739 transitions. [2023-08-04 08:55:16,576 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 08:55:16,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 515.0) internal successors, (2060), 4 states have internal predecessors, (2060), 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 08:55:16,579 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 515.0) internal successors, (2060), 4 states have internal predecessors, (2060), 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 08:55:16,579 INFO L175 Difference]: Start difference. First operand has 51 places, 63 transitions, 178 flow. Second operand 3 states and 739 transitions. [2023-08-04 08:55:16,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 73 transitions, 336 flow [2023-08-04 08:55:16,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 73 transitions, 332 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:55:16,581 INFO L231 Difference]: Finished difference. Result has 52 places, 63 transitions, 182 flow [2023-08-04 08:55:16,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=515, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=52, PETRI_TRANSITIONS=63} [2023-08-04 08:55:16,581 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -4 predicate places. [2023-08-04 08:55:16,581 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 63 transitions, 182 flow [2023-08-04 08:55:16,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.33333333333334) internal successors, (685), 3 states have internal predecessors, (685), 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 08:55:16,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:55:16,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:55:16,591 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 08:55:16,786 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,SelfDestructingSolverStorable2 [2023-08-04 08:55:16,787 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:55:16,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:55:16,787 INFO L85 PathProgramCache]: Analyzing trace with hash 733370641, now seen corresponding path program 1 times [2023-08-04 08:55:16,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:55:16,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894071170] [2023-08-04 08:55:16,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:55:16,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:55:16,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:55:16,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:55:16,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:55:16,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894071170] [2023-08-04 08:55:16,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894071170] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:55:16,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361806709] [2023-08-04 08:55:16,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:55:16,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:55:16,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:55:16,861 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:55:16,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 08:55:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:55:16,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:55:16,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:55:16,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:55:16,987 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:55:16,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361806709] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:55:16,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:55:16,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:55:16,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636961495] [2023-08-04 08:55:16,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:55:16,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:55:16,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:55:16,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:55:16,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:55:16,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 515 [2023-08-04 08:55:17,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 63 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 229.33333333333334) internal successors, (688), 3 states have internal predecessors, (688), 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 08:55:17,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:55:17,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 515 [2023-08-04 08:55:17,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:55:17,904 INFO L124 PetriNetUnfolderBase]: 10940/15085 cut-off events. [2023-08-04 08:55:17,905 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2023-08-04 08:55:17,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30658 conditions, 15085 events. 10940/15085 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 71402 event pairs, 4955 based on Foata normal form. 0/10590 useless extension candidates. Maximal degree in co-relation 13051. Up to 13819 conditions per place. [2023-08-04 08:55:17,942 INFO L140 encePairwiseOnDemand]: 512/515 looper letters, 69 selfloop transitions, 2 changer transitions 1/76 dead transitions. [2023-08-04 08:55:17,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 76 transitions, 352 flow [2023-08-04 08:55:17,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:55:17,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:55:17,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 742 transitions. [2023-08-04 08:55:17,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4802588996763754 [2023-08-04 08:55:17,944 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 742 transitions. [2023-08-04 08:55:17,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 742 transitions. [2023-08-04 08:55:17,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:55:17,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 742 transitions. [2023-08-04 08:55:17,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 247.33333333333334) internal successors, (742), 3 states have internal predecessors, (742), 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 08:55:17,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 515.0) internal successors, (2060), 4 states have internal predecessors, (2060), 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 08:55:17,948 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 515.0) internal successors, (2060), 4 states have internal predecessors, (2060), 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 08:55:17,949 INFO L175 Difference]: Start difference. First operand has 52 places, 63 transitions, 182 flow. Second operand 3 states and 742 transitions. [2023-08-04 08:55:17,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 76 transitions, 352 flow [2023-08-04 08:55:17,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 76 transitions, 348 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:55:17,950 INFO L231 Difference]: Finished difference. Result has 53 places, 63 transitions, 186 flow [2023-08-04 08:55:17,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=515, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=53, PETRI_TRANSITIONS=63} [2023-08-04 08:55:17,951 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -3 predicate places. [2023-08-04 08:55:17,951 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 63 transitions, 186 flow [2023-08-04 08:55:17,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 229.33333333333334) internal successors, (688), 3 states have internal predecessors, (688), 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 08:55:17,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:55:17,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:55:17,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 08:55:18,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:55:18,156 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:55:18,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:55:18,157 INFO L85 PathProgramCache]: Analyzing trace with hash 926213504, now seen corresponding path program 1 times [2023-08-04 08:55:18,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:55:18,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439727433] [2023-08-04 08:55:18,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:55:18,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:55:18,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:55:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:55:18,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:55:18,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439727433] [2023-08-04 08:55:18,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439727433] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:55:18,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304907009] [2023-08-04 08:55:18,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:55:18,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:55:18,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:55:18,214 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:55:18,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 08:55:18,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:55:18,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:55:18,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:55:18,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:55:18,300 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:55:18,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304907009] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:55:18,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:55:18,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:55:18,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570583910] [2023-08-04 08:55:18,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:55:18,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:55:18,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:55:18,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:55:18,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:55:18,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 515 [2023-08-04 08:55:18,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 63 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 230.33333333333334) internal successors, (691), 3 states have internal predecessors, (691), 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 08:55:18,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:55:18,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 515 [2023-08-04 08:55:18,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:55:18,928 INFO L124 PetriNetUnfolderBase]: 7376/10306 cut-off events. [2023-08-04 08:55:18,928 INFO L125 PetriNetUnfolderBase]: For 231/231 co-relation queries the response was YES. [2023-08-04 08:55:18,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21335 conditions, 10306 events. 7376/10306 cut-off events. For 231/231 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 46241 event pairs, 3906 based on Foata normal form. 0/7296 useless extension candidates. Maximal degree in co-relation 9835. Up to 8689 conditions per place. [2023-08-04 08:55:18,954 INFO L140 encePairwiseOnDemand]: 512/515 looper letters, 75 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2023-08-04 08:55:18,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 81 transitions, 384 flow [2023-08-04 08:55:18,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:55:18,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:55:18,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 747 transitions. [2023-08-04 08:55:18,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48349514563106794 [2023-08-04 08:55:18,956 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 747 transitions. [2023-08-04 08:55:18,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 747 transitions. [2023-08-04 08:55:18,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:55:18,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 747 transitions. [2023-08-04 08:55:18,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.0) internal successors, (747), 3 states have internal predecessors, (747), 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 08:55:18,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 515.0) internal successors, (2060), 4 states have internal predecessors, (2060), 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 08:55:18,961 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 515.0) internal successors, (2060), 4 states have internal predecessors, (2060), 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 08:55:18,961 INFO L175 Difference]: Start difference. First operand has 53 places, 63 transitions, 186 flow. Second operand 3 states and 747 transitions. [2023-08-04 08:55:18,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 81 transitions, 384 flow [2023-08-04 08:55:18,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 81 transitions, 380 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:55:18,963 INFO L231 Difference]: Finished difference. Result has 54 places, 64 transitions, 194 flow [2023-08-04 08:55:18,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=515, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=54, PETRI_TRANSITIONS=64} [2023-08-04 08:55:18,963 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -2 predicate places. [2023-08-04 08:55:18,964 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 64 transitions, 194 flow [2023-08-04 08:55:18,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 230.33333333333334) internal successors, (691), 3 states have internal predecessors, (691), 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 08:55:18,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:55:18,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:55:18,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 08:55:19,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:55:19,169 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:55:19,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:55:19,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1353073339, now seen corresponding path program 1 times [2023-08-04 08:55:19,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:55:19,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614949280] [2023-08-04 08:55:19,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:55:19,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:55:19,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:55:19,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:55:19,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:55:19,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614949280] [2023-08-04 08:55:19,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614949280] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:55:19,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522376380] [2023-08-04 08:55:19,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:55:19,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:55:19,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:55:19,236 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:55:19,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 08:55:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:55:19,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:55:19,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:55:19,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:55:19,336 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:55:19,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522376380] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:55:19,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:55:19,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:55:19,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112117415] [2023-08-04 08:55:19,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:55:19,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:55:19,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:55:19,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:55:19,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:55:19,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 515 [2023-08-04 08:55:19,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 64 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 231.66666666666666) internal successors, (695), 3 states have internal predecessors, (695), 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 08:55:19,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:55:19,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 515 [2023-08-04 08:55:19,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:55:19,989 INFO L124 PetriNetUnfolderBase]: 5549/7883 cut-off events. [2023-08-04 08:55:19,990 INFO L125 PetriNetUnfolderBase]: For 586/586 co-relation queries the response was YES. [2023-08-04 08:55:20,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16840 conditions, 7883 events. 5549/7883 cut-off events. For 586/586 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 34003 event pairs, 2893 based on Foata normal form. 0/5900 useless extension candidates. Maximal degree in co-relation 7827. Up to 6097 conditions per place. [2023-08-04 08:55:20,017 INFO L140 encePairwiseOnDemand]: 512/515 looper letters, 76 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-08-04 08:55:20,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 82 transitions, 394 flow [2023-08-04 08:55:20,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:55:20,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:55:20,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 747 transitions. [2023-08-04 08:55:20,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48349514563106794 [2023-08-04 08:55:20,019 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 747 transitions. [2023-08-04 08:55:20,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 747 transitions. [2023-08-04 08:55:20,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:55:20,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 747 transitions. [2023-08-04 08:55:20,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.0) internal successors, (747), 3 states have internal predecessors, (747), 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 08:55:20,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 515.0) internal successors, (2060), 4 states have internal predecessors, (2060), 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 08:55:20,023 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 515.0) internal successors, (2060), 4 states have internal predecessors, (2060), 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 08:55:20,024 INFO L175 Difference]: Start difference. First operand has 54 places, 64 transitions, 194 flow. Second operand 3 states and 747 transitions. [2023-08-04 08:55:20,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 82 transitions, 394 flow [2023-08-04 08:55:20,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 82 transitions, 392 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:55:20,027 INFO L231 Difference]: Finished difference. Result has 56 places, 65 transitions, 204 flow [2023-08-04 08:55:20,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=515, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=56, PETRI_TRANSITIONS=65} [2023-08-04 08:55:20,028 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 0 predicate places. [2023-08-04 08:55:20,028 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 65 transitions, 204 flow [2023-08-04 08:55:20,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 231.66666666666666) internal successors, (695), 3 states have internal predecessors, (695), 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 08:55:20,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:55:20,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:55:20,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 08:55:20,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:55:20,235 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:55:20,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:55:20,235 INFO L85 PathProgramCache]: Analyzing trace with hash -721783259, now seen corresponding path program 1 times [2023-08-04 08:55:20,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:55:20,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756863970] [2023-08-04 08:55:20,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:55:20,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:55:20,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:55:20,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:55:20,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:55:20,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756863970] [2023-08-04 08:55:20,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756863970] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:55:20,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429176436] [2023-08-04 08:55:20,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:55:20,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:55:20,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:55:20,295 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:55:20,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 08:55:20,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:55:20,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:55:20,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:55:20,403 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 08:55:20,403 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:55:20,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429176436] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:55:20,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:55:20,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:55:20,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801015589] [2023-08-04 08:55:20,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:55:20,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:55:20,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:55:20,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:55:20,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:55:20,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 515 [2023-08-04 08:55:20,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 65 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 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 08:55:20,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:55:20,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 515 [2023-08-04 08:55:20,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:55:20,837 INFO L124 PetriNetUnfolderBase]: 5192/7368 cut-off events. [2023-08-04 08:55:20,837 INFO L125 PetriNetUnfolderBase]: For 652/652 co-relation queries the response was YES. [2023-08-04 08:55:20,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16071 conditions, 7368 events. 5192/7368 cut-off events. For 652/652 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 31186 event pairs, 3202 based on Foata normal form. 0/5664 useless extension candidates. Maximal degree in co-relation 10151. Up to 6673 conditions per place. [2023-08-04 08:55:20,851 INFO L140 encePairwiseOnDemand]: 512/515 looper letters, 77 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-08-04 08:55:20,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 83 transitions, 406 flow [2023-08-04 08:55:20,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:55:20,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:55:20,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 747 transitions. [2023-08-04 08:55:20,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48349514563106794 [2023-08-04 08:55:20,854 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 747 transitions. [2023-08-04 08:55:20,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 747 transitions. [2023-08-04 08:55:20,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:55:20,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 747 transitions. [2023-08-04 08:55:20,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.0) internal successors, (747), 3 states have internal predecessors, (747), 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 08:55:20,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 515.0) internal successors, (2060), 4 states have internal predecessors, (2060), 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 08:55:20,857 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 515.0) internal successors, (2060), 4 states have internal predecessors, (2060), 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 08:55:20,857 INFO L175 Difference]: Start difference. First operand has 56 places, 65 transitions, 204 flow. Second operand 3 states and 747 transitions. [2023-08-04 08:55:20,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 83 transitions, 406 flow [2023-08-04 08:55:20,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 83 transitions, 404 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:55:20,869 INFO L231 Difference]: Finished difference. Result has 58 places, 66 transitions, 214 flow [2023-08-04 08:55:20,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=515, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=58, PETRI_TRANSITIONS=66} [2023-08-04 08:55:20,870 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2023-08-04 08:55:20,870 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 66 transitions, 214 flow [2023-08-04 08:55:20,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 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 08:55:20,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:55:20,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:55:20,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 08:55:21,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:55:21,078 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:55:21,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:55:21,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1714747346, now seen corresponding path program 1 times [2023-08-04 08:55:21,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:55:21,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252365074] [2023-08-04 08:55:21,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:55:21,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:55:21,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:55:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:55:21,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:55:21,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252365074] [2023-08-04 08:55:21,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252365074] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:55:21,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131016150] [2023-08-04 08:55:21,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:55:21,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:55:21,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:55:21,133 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:55:21,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 08:55:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:55:21,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:55:21,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:55:21,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:55:21,235 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:55:21,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131016150] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:55:21,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:55:21,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 08:55:21,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433065019] [2023-08-04 08:55:21,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:55:21,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:55:21,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:55:21,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:55:21,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:55:21,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 515 [2023-08-04 08:55:21,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 66 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 234.33333333333334) internal successors, (703), 3 states have internal predecessors, (703), 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 08:55:21,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:55:21,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 515 [2023-08-04 08:55:21,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:55:21,712 INFO L124 PetriNetUnfolderBase]: 5179/7345 cut-off events. [2023-08-04 08:55:21,712 INFO L125 PetriNetUnfolderBase]: For 558/558 co-relation queries the response was YES. [2023-08-04 08:55:21,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16066 conditions, 7345 events. 5179/7345 cut-off events. For 558/558 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 31045 event pairs, 3347 based on Foata normal form. 0/5670 useless extension candidates. Maximal degree in co-relation 14739. Up to 7022 conditions per place. [2023-08-04 08:55:21,732 INFO L140 encePairwiseOnDemand]: 512/515 looper letters, 69 selfloop transitions, 2 changer transitions 4/79 dead transitions. [2023-08-04 08:55:21,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 79 transitions, 390 flow [2023-08-04 08:55:21,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:55:21,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:55:21,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 742 transitions. [2023-08-04 08:55:21,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4802588996763754 [2023-08-04 08:55:21,734 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 742 transitions. [2023-08-04 08:55:21,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 742 transitions. [2023-08-04 08:55:21,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:55:21,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 742 transitions. [2023-08-04 08:55:21,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 247.33333333333334) internal successors, (742), 3 states have internal predecessors, (742), 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 08:55:21,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 515.0) internal successors, (2060), 4 states have internal predecessors, (2060), 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 08:55:21,737 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 515.0) internal successors, (2060), 4 states have internal predecessors, (2060), 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 08:55:21,737 INFO L175 Difference]: Start difference. First operand has 58 places, 66 transitions, 214 flow. Second operand 3 states and 742 transitions. [2023-08-04 08:55:21,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 79 transitions, 390 flow [2023-08-04 08:55:21,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 79 transitions, 388 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:55:21,749 INFO L231 Difference]: Finished difference. Result has 60 places, 63 transitions, 208 flow [2023-08-04 08:55:21,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=515, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=60, PETRI_TRANSITIONS=63} [2023-08-04 08:55:21,749 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 4 predicate places. [2023-08-04 08:55:21,749 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 63 transitions, 208 flow [2023-08-04 08:55:21,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 234.33333333333334) internal successors, (703), 3 states have internal predecessors, (703), 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 08:55:21,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:55:21,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:55:21,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 08:55:21,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:55:21,954 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:55:21,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:55:21,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1161972061, now seen corresponding path program 1 times [2023-08-04 08:55:21,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:55:21,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272578188] [2023-08-04 08:55:21,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:55:21,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:55:21,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:55:22,011 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:55:22,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:55:22,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272578188] [2023-08-04 08:55:22,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272578188] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:55:22,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364273785] [2023-08-04 08:55:22,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:55:22,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:55:22,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:55:22,013 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:55:22,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 08:55:22,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:55:22,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:55:22,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:55:22,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:55:22,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:55:22,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:55:22,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364273785] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:55:22,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:55:22,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:55:22,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231361566] [2023-08-04 08:55:22,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:55:22,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:55:22,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:55:22,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:55:22,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:55:22,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 515 [2023-08-04 08:55:22,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 63 transitions, 208 flow. Second operand has 5 states, 5 states have (on average 230.4) internal successors, (1152), 5 states have internal predecessors, (1152), 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 08:55:22,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:55:22,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 515 [2023-08-04 08:55:22,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:55:22,205 INFO L124 PetriNetUnfolderBase]: 8/20 cut-off events. [2023-08-04 08:55:22,205 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:55:22,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 20 events. 8/20 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 29 event pairs, 0 based on Foata normal form. 3/20 useless extension candidates. Maximal degree in co-relation 44. Up to 12 conditions per place. [2023-08-04 08:55:22,205 INFO L140 encePairwiseOnDemand]: 512/515 looper letters, 0 selfloop transitions, 0 changer transitions 13/13 dead transitions. [2023-08-04 08:55:22,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 13 transitions, 56 flow [2023-08-04 08:55:22,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:55:22,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:55:22,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 902 transitions. [2023-08-04 08:55:22,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43786407766990293 [2023-08-04 08:55:22,208 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 902 transitions. [2023-08-04 08:55:22,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 902 transitions. [2023-08-04 08:55:22,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:55:22,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 902 transitions. [2023-08-04 08:55:22,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 225.5) internal successors, (902), 4 states have internal predecessors, (902), 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 08:55:22,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 515.0) internal successors, (2575), 5 states have internal predecessors, (2575), 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 08:55:22,213 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 515.0) internal successors, (2575), 5 states have internal predecessors, (2575), 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 08:55:22,213 INFO L175 Difference]: Start difference. First operand has 60 places, 63 transitions, 208 flow. Second operand 4 states and 902 transitions. [2023-08-04 08:55:22,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 13 transitions, 56 flow [2023-08-04 08:55:22,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 13 transitions, 54 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:55:22,213 INFO L231 Difference]: Finished difference. Result has 23 places, 0 transitions, 0 flow [2023-08-04 08:55:22,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=515, PETRI_DIFFERENCE_MINUEND_FLOW=20, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=23, PETRI_TRANSITIONS=0} [2023-08-04 08:55:22,214 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -33 predicate places. [2023-08-04 08:55:22,214 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 0 transitions, 0 flow [2023-08-04 08:55:22,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 230.4) internal successors, (1152), 5 states have internal predecessors, (1152), 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 08:55:22,217 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:55:22,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 08:55:22,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-08-04 08:55:22,418 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:55:22,419 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:55:22,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 244 places, 274 transitions, 616 flow [2023-08-04 08:55:22,540 INFO L124 PetriNetUnfolderBase]: 274/1564 cut-off events. [2023-08-04 08:55:22,540 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 08:55:22,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1742 conditions, 1564 events. 274/1564 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 10099 event pairs, 0 based on Foata normal form. 0/1308 useless extension candidates. Maximal degree in co-relation 921. Up to 33 conditions per place. [2023-08-04 08:55:22,548 INFO L82 GeneralOperation]: Start removeDead. Operand has 244 places, 274 transitions, 616 flow [2023-08-04 08:55:22,554 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 244 places, 274 transitions, 616 flow [2023-08-04 08:55:22,555 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:55:22,555 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 244 places, 274 transitions, 616 flow [2023-08-04 08:55:22,555 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 244 places, 274 transitions, 616 flow [2023-08-04 08:55:22,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 244 places, 274 transitions, 616 flow [2023-08-04 08:55:22,645 INFO L124 PetriNetUnfolderBase]: 274/1564 cut-off events. [2023-08-04 08:55:22,645 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 08:55:22,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1742 conditions, 1564 events. 274/1564 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 10099 event pairs, 0 based on Foata normal form. 0/1308 useless extension candidates. Maximal degree in co-relation 921. Up to 33 conditions per place. [2023-08-04 08:55:22,659 INFO L119 LiptonReduction]: Number of co-enabled transitions 9280 [2023-08-04 08:55:29,133 INFO L134 LiptonReduction]: Checked pairs total: 24307 [2023-08-04 08:55:29,133 INFO L136 LiptonReduction]: Total number of compositions: 249 [2023-08-04 08:55:29,134 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:55:29,134 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;@76ed897d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:55:29,135 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 08:55:29,137 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:55:29,137 INFO L124 PetriNetUnfolderBase]: 4/35 cut-off events. [2023-08-04 08:55:29,137 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:55:29,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:55:29,137 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 08:55:29,137 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 08:55:29,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:55:29,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1188704360, now seen corresponding path program 1 times [2023-08-04 08:55:29,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:55:29,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252248390] [2023-08-04 08:55:29,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:55:29,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:55:29,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:55:29,168 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:55:29,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:55:29,193 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:55:29,193 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:55:29,193 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 08:55:29,193 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 08:55:29,193 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 08:55:29,193 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 08:55:29,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 08:55:29,193 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 08:55:29,194 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 08:55:29,194 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:55:29,194 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:55:29,222 INFO L144 ThreadInstanceAdder]: Constructed 32 joinOtherThreadTransitions. [2023-08-04 08:55:29,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 288 places, 334 transitions, 812 flow [2023-08-04 08:55:31,225 INFO L124 PetriNetUnfolderBase]: 5487/20427 cut-off events. [2023-08-04 08:55:31,225 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 08:55:31,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24812 conditions, 20427 events. 5487/20427 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 214538 event pairs, 162 based on Foata normal form. 0/17461 useless extension candidates. Maximal degree in co-relation 12345. Up to 1024 conditions per place. [2023-08-04 08:55:31,381 INFO L82 GeneralOperation]: Start removeDead. Operand has 288 places, 334 transitions, 812 flow [2023-08-04 08:55:31,462 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 288 places, 334 transitions, 812 flow [2023-08-04 08:55:31,462 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:55:31,462 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 288 places, 334 transitions, 812 flow [2023-08-04 08:55:31,462 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 288 places, 334 transitions, 812 flow [2023-08-04 08:55:31,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 288 places, 334 transitions, 812 flow [2023-08-04 08:55:33,146 INFO L124 PetriNetUnfolderBase]: 5487/20427 cut-off events. [2023-08-04 08:55:33,147 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 08:55:33,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24812 conditions, 20427 events. 5487/20427 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 214538 event pairs, 162 based on Foata normal form. 0/17461 useless extension candidates. Maximal degree in co-relation 12345. Up to 1024 conditions per place. [2023-08-04 08:55:33,601 INFO L119 LiptonReduction]: Number of co-enabled transitions 24640 [2023-08-04 08:55:40,023 INFO L134 LiptonReduction]: Checked pairs total: 72641 [2023-08-04 08:55:40,023 INFO L136 LiptonReduction]: Total number of compositions: 277 [2023-08-04 08:55:40,024 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:55:40,025 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;@76ed897d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:55:40,025 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:55:40,029 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:55:40,029 INFO L124 PetriNetUnfolderBase]: 6/62 cut-off events. [2023-08-04 08:55:40,029 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 08:55:40,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:55:40,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:55:40,029 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:55:40,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:55:40,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1169168638, now seen corresponding path program 1 times [2023-08-04 08:55:40,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:55:40,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466094478] [2023-08-04 08:55:40,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:55:40,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:55:40,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:55:40,053 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 08:55:40,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:55:40,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466094478] [2023-08-04 08:55:40,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466094478] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:55:40,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:55:40,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:55:40,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492574865] [2023-08-04 08:55:40,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:55:40,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:55:40,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:55:40,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:55:40,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:55:40,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 611 [2023-08-04 08:55:40,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 104 transitions, 352 flow. Second operand has 3 states, 3 states have (on average 254.33333333333334) internal successors, (763), 3 states have internal predecessors, (763), 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 08:55:40,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:55:40,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 611 [2023-08-04 08:55:40,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand