/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_bench-exp3x3-opt.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:12:12,699 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:12:12,774 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:12:12,780 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:12:12,781 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:12:12,781 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:12:12,782 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:12:12,809 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:12:12,810 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:12:12,814 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:12:12,814 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:12:12,814 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:12:12,815 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:12:12,817 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:12:12,817 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:12:12,817 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:12:12,817 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:12:12,818 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:12:12,818 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:12:12,818 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:12:12,819 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:12:12,819 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:12:12,819 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:12:12,819 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:12:12,821 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:12:12,821 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:12:12,821 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:12:12,822 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:12:12,822 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:12:12,822 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:12:12,823 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:12:12,824 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:12:12,824 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:12:12,824 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:12:12,824 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:12:12,824 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:12:12,825 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:12:12,825 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:12:12,825 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:12:12,825 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:12:12,825 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:12:12,826 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:12:13,015 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:12:13,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:12:13,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:12:13,032 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:12:13,032 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:12:13,033 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_bench-exp3x3-opt.wvr_bound2.c [2023-08-04 08:12:14,131 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:12:14,314 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:12:14,315 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_bench-exp3x3-opt.wvr_bound2.c [2023-08-04 08:12:14,322 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ef9c787c/928a97fcd36c4b3eb92a68553f23c235/FLAG55cb32181 [2023-08-04 08:12:14,335 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ef9c787c/928a97fcd36c4b3eb92a68553f23c235 [2023-08-04 08:12:14,337 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:12:14,338 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:12:14,339 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:12:14,339 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:12:14,345 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:12:14,345 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:12:14" (1/1) ... [2023-08-04 08:12:14,346 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dd16e30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:12:14, skipping insertion in model container [2023-08-04 08:12:14,346 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:12:14" (1/1) ... [2023-08-04 08:12:14,367 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:12:14,505 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_bench-exp3x3-opt.wvr_bound2.c[3312,3325] [2023-08-04 08:12:14,507 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:12:14,515 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:12:14,541 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_bench-exp3x3-opt.wvr_bound2.c[3312,3325] [2023-08-04 08:12:14,543 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:12:14,559 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:12:14,560 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:12:14 WrapperNode [2023-08-04 08:12:14,560 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:12:14,561 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:12:14,561 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:12:14,561 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:12:14,566 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:12:14" (1/1) ... [2023-08-04 08:12:14,585 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:12:14" (1/1) ... [2023-08-04 08:12:14,610 INFO L138 Inliner]: procedures = 25, calls = 44, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 228 [2023-08-04 08:12:14,610 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:12:14,611 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:12:14,611 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:12:14,611 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:12:14,618 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:12:14" (1/1) ... [2023-08-04 08:12:14,618 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:12:14" (1/1) ... [2023-08-04 08:12:14,621 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:12:14" (1/1) ... [2023-08-04 08:12:14,621 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:12:14" (1/1) ... [2023-08-04 08:12:14,629 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:12:14" (1/1) ... [2023-08-04 08:12:14,638 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:12:14" (1/1) ... [2023-08-04 08:12:14,639 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:12:14" (1/1) ... [2023-08-04 08:12:14,640 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:12:14" (1/1) ... [2023-08-04 08:12:14,643 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:12:14,644 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:12:14,644 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:12:14,644 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:12:14,645 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:12:14" (1/1) ... [2023-08-04 08:12:14,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:12:14,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:12:14,686 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 08:12:14,699 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 08:12:14,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:12:14,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:12:14,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:12:14,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:12:14,726 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:12:14,726 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:12:14,726 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:12:14,727 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:12:14,727 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 08:12:14,727 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 08:12:14,727 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-04 08:12:14,728 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-04 08:12:14,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:12:14,729 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-08-04 08:12:14,729 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-08-04 08:12:14,729 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-08-04 08:12:14,729 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-08-04 08:12:14,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:12:14,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:12:14,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:12:14,731 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 08:12:14,855 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:12:14,857 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:12:15,205 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:12:15,212 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:12:15,212 INFO L302 CfgBuilder]: Removed 18 assume(true) statements. [2023-08-04 08:12:15,214 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:12:15 BoogieIcfgContainer [2023-08-04 08:12:15,214 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:12:15,217 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:12:15,217 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:12:15,219 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:12:15,219 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:12:14" (1/3) ... [2023-08-04 08:12:15,220 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a6b5dda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:12:15, skipping insertion in model container [2023-08-04 08:12:15,220 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:12:14" (2/3) ... [2023-08-04 08:12:15,220 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a6b5dda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:12:15, skipping insertion in model container [2023-08-04 08:12:15,221 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:12:15" (3/3) ... [2023-08-04 08:12:15,222 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_bench-exp3x3-opt.wvr_bound2.c [2023-08-04 08:12:15,228 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:12:15,236 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:12:15,236 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:12:15,236 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:12:15,356 INFO L144 ThreadInstanceAdder]: Constructed 36 joinOtherThreadTransitions. [2023-08-04 08:12:15,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 234 places, 283 transitions, 704 flow [2023-08-04 08:12:16,521 INFO L124 PetriNetUnfolderBase]: 1853/7807 cut-off events. [2023-08-04 08:12:16,521 INFO L125 PetriNetUnfolderBase]: For 1152/1152 co-relation queries the response was YES. [2023-08-04 08:12:16,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9155 conditions, 7807 events. 1853/7807 cut-off events. For 1152/1152 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 74612 event pairs, 0 based on Foata normal form. 0/6532 useless extension candidates. Maximal degree in co-relation 4468. Up to 193 conditions per place. [2023-08-04 08:12:16,575 INFO L82 GeneralOperation]: Start removeDead. Operand has 234 places, 283 transitions, 704 flow [2023-08-04 08:12:16,626 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 234 places, 283 transitions, 704 flow [2023-08-04 08:12:16,629 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:12:16,643 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 234 places, 283 transitions, 704 flow [2023-08-04 08:12:16,646 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 234 places, 283 transitions, 704 flow [2023-08-04 08:12:16,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 234 places, 283 transitions, 704 flow [2023-08-04 08:12:17,627 INFO L124 PetriNetUnfolderBase]: 1853/7807 cut-off events. [2023-08-04 08:12:17,628 INFO L125 PetriNetUnfolderBase]: For 1152/1152 co-relation queries the response was YES. [2023-08-04 08:12:17,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9155 conditions, 7807 events. 1853/7807 cut-off events. For 1152/1152 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 74612 event pairs, 0 based on Foata normal form. 0/6532 useless extension candidates. Maximal degree in co-relation 4468. Up to 193 conditions per place. [2023-08-04 08:12:17,754 INFO L119 LiptonReduction]: Number of co-enabled transitions 12240 [2023-08-04 08:12:23,523 INFO L134 LiptonReduction]: Checked pairs total: 44499 [2023-08-04 08:12:23,523 INFO L136 LiptonReduction]: Total number of compositions: 202 [2023-08-04 08:12:23,536 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:12:23,541 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;@3840dca5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:12:23,542 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:12:23,559 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:12:23,559 INFO L124 PetriNetUnfolderBase]: 35/246 cut-off events. [2023-08-04 08:12:23,559 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-04 08:12:23,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:12:23,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:12:23,561 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:12:23,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:12:23,565 INFO L85 PathProgramCache]: Analyzing trace with hash -310956680, now seen corresponding path program 1 times [2023-08-04 08:12:23,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:12:23,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898477406] [2023-08-04 08:12:23,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:12:23,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:12:23,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:12:23,868 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 08:12:23,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:12:23,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898477406] [2023-08-04 08:12:23,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898477406] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:12:23,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:12:23,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:12:23,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443268913] [2023-08-04 08:12:23,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:12:23,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:12:23,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:12:23,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:12:23,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:12:23,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 485 [2023-08-04 08:12:23,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 104 transitions, 346 flow. Second operand has 3 states, 3 states have (on average 220.33333333333334) internal successors, (661), 3 states have internal predecessors, (661), 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 08:12:23,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:12:23,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 485 [2023-08-04 08:12:23,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:12:29,676 INFO L124 PetriNetUnfolderBase]: 69300/89161 cut-off events. [2023-08-04 08:12:29,676 INFO L125 PetriNetUnfolderBase]: For 8794/8794 co-relation queries the response was YES. [2023-08-04 08:12:29,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183574 conditions, 89161 events. 69300/89161 cut-off events. For 8794/8794 co-relation queries the response was YES. Maximal size of possible extension queue 1574. Compared 448055 event pairs, 24881 based on Foata normal form. 0/53540 useless extension candidates. Maximal degree in co-relation 130904. Up to 84707 conditions per place. [2023-08-04 08:12:30,225 INFO L140 encePairwiseOnDemand]: 481/485 looper letters, 91 selfloop transitions, 2 changer transitions 7/106 dead transitions. [2023-08-04 08:12:30,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 106 transitions, 538 flow [2023-08-04 08:12:30,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:12:30,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:12:30,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 744 transitions. [2023-08-04 08:12:30,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.511340206185567 [2023-08-04 08:12:30,245 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 744 transitions. [2023-08-04 08:12:30,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 744 transitions. [2023-08-04 08:12:30,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:12:30,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 744 transitions. [2023-08-04 08:12:30,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.0) internal successors, (744), 3 states have internal predecessors, (744), 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 08:12:30,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 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 08:12:30,265 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 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 08:12:30,267 INFO L175 Difference]: Start difference. First operand has 75 places, 104 transitions, 346 flow. Second operand 3 states and 744 transitions. [2023-08-04 08:12:30,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 106 transitions, 538 flow [2023-08-04 08:12:30,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 106 transitions, 538 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:12:30,313 INFO L231 Difference]: Finished difference. Result has 77 places, 97 transitions, 328 flow [2023-08-04 08:12:30,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=328, PETRI_PLACES=77, PETRI_TRANSITIONS=97} [2023-08-04 08:12:30,319 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 2 predicate places. [2023-08-04 08:12:30,319 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 97 transitions, 328 flow [2023-08-04 08:12:30,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.33333333333334) internal successors, (661), 3 states have internal predecessors, (661), 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 08:12:30,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:12:30,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:12:30,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:12:30,320 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:12:30,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:12:30,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1518519959, now seen corresponding path program 1 times [2023-08-04 08:12:30,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:12:30,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387419053] [2023-08-04 08:12:30,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:12:30,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:12:30,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:12:30,457 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 08:12:30,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:12:30,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387419053] [2023-08-04 08:12:30,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387419053] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:12:30,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474428933] [2023-08-04 08:12:30,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:12:30,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:12:30,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:12:30,465 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 08:12:30,466 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 08:12:30,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:12:30,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:12:30,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:12:30,589 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 08:12:30,589 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:12:30,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474428933] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:12:30,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:12:30,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:12:30,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459041777] [2023-08-04 08:12:30,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:12:30,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:12:30,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:12:30,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:12:30,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:12:30,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 485 [2023-08-04 08:12:30,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 97 transitions, 328 flow. Second operand has 3 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 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 08:12:30,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:12:30,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 485 [2023-08-04 08:12:30,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:12:34,703 INFO L124 PetriNetUnfolderBase]: 67010/85771 cut-off events. [2023-08-04 08:12:34,703 INFO L125 PetriNetUnfolderBase]: For 8778/8778 co-relation queries the response was YES. [2023-08-04 08:12:35,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176643 conditions, 85771 events. 67010/85771 cut-off events. For 8778/8778 co-relation queries the response was YES. Maximal size of possible extension queue 1583. Compared 422386 event pairs, 24260 based on Foata normal form. 0/51498 useless extension candidates. Maximal degree in co-relation 176612. Up to 81764 conditions per place. [2023-08-04 08:12:35,318 INFO L140 encePairwiseOnDemand]: 482/485 looper letters, 93 selfloop transitions, 2 changer transitions 1/102 dead transitions. [2023-08-04 08:12:35,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 102 transitions, 530 flow [2023-08-04 08:12:35,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:12:35,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:12:35,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 745 transitions. [2023-08-04 08:12:35,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5120274914089347 [2023-08-04 08:12:35,327 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 745 transitions. [2023-08-04 08:12:35,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 745 transitions. [2023-08-04 08:12:35,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:12:35,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 745 transitions. [2023-08-04 08:12:35,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 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 08:12:35,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 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 08:12:35,333 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 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 08:12:35,333 INFO L175 Difference]: Start difference. First operand has 77 places, 97 transitions, 328 flow. Second operand 3 states and 745 transitions. [2023-08-04 08:12:35,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 102 transitions, 530 flow [2023-08-04 08:12:35,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 102 transitions, 484 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-04 08:12:35,365 INFO L231 Difference]: Finished difference. Result has 66 places, 97 transitions, 290 flow [2023-08-04 08:12:35,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=290, PETRI_PLACES=66, PETRI_TRANSITIONS=97} [2023-08-04 08:12:35,365 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -9 predicate places. [2023-08-04 08:12:35,366 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 97 transitions, 290 flow [2023-08-04 08:12:35,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 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 08:12:35,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:12:35,366 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 08:12:35,375 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 08:12:35,572 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 08:12:35,572 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:12:35,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:12:35,573 INFO L85 PathProgramCache]: Analyzing trace with hash 664649037, now seen corresponding path program 1 times [2023-08-04 08:12:35,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:12:35,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116930862] [2023-08-04 08:12:35,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:12:35,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:12:35,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:12:35,651 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 08:12:35,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:12:35,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116930862] [2023-08-04 08:12:35,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116930862] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:12:35,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108087340] [2023-08-04 08:12:35,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:12:35,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:12:35,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:12:35,654 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 08:12:35,657 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 08:12:35,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:12:35,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:12:35,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:12:35,750 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 08:12:35,750 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:12:35,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108087340] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:12:35,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:12:35,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:12:35,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833645042] [2023-08-04 08:12:35,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:12:35,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:12:35,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:12:35,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:12:35,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:12:35,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 485 [2023-08-04 08:12:35,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 97 transitions, 290 flow. Second operand has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 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 08:12:35,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:12:35,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 485 [2023-08-04 08:12:35,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:12:39,341 INFO L124 PetriNetUnfolderBase]: 65362/83707 cut-off events. [2023-08-04 08:12:39,341 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-08-04 08:12:39,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172312 conditions, 83707 events. 65362/83707 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 1581. Compared 410822 event pairs, 23859 based on Foata normal form. 0/50394 useless extension candidates. Maximal degree in co-relation 102727. Up to 79666 conditions per place. [2023-08-04 08:12:39,697 INFO L140 encePairwiseOnDemand]: 482/485 looper letters, 95 selfloop transitions, 2 changer transitions 1/104 dead transitions. [2023-08-04 08:12:39,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 104 transitions, 500 flow [2023-08-04 08:12:39,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:12:39,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:12:39,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 747 transitions. [2023-08-04 08:12:39,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51340206185567 [2023-08-04 08:12:39,700 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 747 transitions. [2023-08-04 08:12:39,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 747 transitions. [2023-08-04 08:12:39,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:12:39,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 747 transitions. [2023-08-04 08:12:39,702 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 08:12:39,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 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 08:12:39,706 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 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 08:12:39,706 INFO L175 Difference]: Start difference. First operand has 66 places, 97 transitions, 290 flow. Second operand 3 states and 747 transitions. [2023-08-04 08:12:39,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 104 transitions, 500 flow [2023-08-04 08:12:39,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 104 transitions, 496 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:12:39,714 INFO L231 Difference]: Finished difference. Result has 67 places, 97 transitions, 294 flow [2023-08-04 08:12:39,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=294, PETRI_PLACES=67, PETRI_TRANSITIONS=97} [2023-08-04 08:12:39,716 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -8 predicate places. [2023-08-04 08:12:39,716 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 97 transitions, 294 flow [2023-08-04 08:12:39,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 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 08:12:39,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:12:39,717 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 08:12:39,722 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 08:12:39,921 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 08:12:39,922 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:12:39,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:12:39,922 INFO L85 PathProgramCache]: Analyzing trace with hash 185749848, now seen corresponding path program 1 times [2023-08-04 08:12:39,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:12:39,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32427988] [2023-08-04 08:12:39,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:12:39,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:12:39,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:12:39,995 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 08:12:39,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:12:39,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32427988] [2023-08-04 08:12:39,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32427988] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:12:39,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598111603] [2023-08-04 08:12:39,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:12:39,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:12:39,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:12:39,998 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 08:12:40,000 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 08:12:40,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:12:40,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:12:40,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:12:40,095 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 08:12:40,096 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:12:40,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598111603] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:12:40,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:12:40,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:12:40,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453908405] [2023-08-04 08:12:40,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:12:40,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:12:40,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:12:40,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:12:40,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:12:40,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 485 [2023-08-04 08:12:40,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 97 transitions, 294 flow. Second operand has 3 states, 3 states have (on average 223.33333333333334) internal successors, (670), 3 states have internal predecessors, (670), 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 08:12:40,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:12:40,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 485 [2023-08-04 08:12:40,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:12:43,964 INFO L124 PetriNetUnfolderBase]: 64234/82323 cut-off events. [2023-08-04 08:12:43,964 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-08-04 08:12:44,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169535 conditions, 82323 events. 64234/82323 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 1486. Compared 400843 event pairs, 23638 based on Foata normal form. 0/49666 useless extension candidates. Maximal degree in co-relation 101595. Up to 78198 conditions per place. [2023-08-04 08:12:44,370 INFO L140 encePairwiseOnDemand]: 482/485 looper letters, 97 selfloop transitions, 2 changer transitions 1/106 dead transitions. [2023-08-04 08:12:44,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 106 transitions, 512 flow [2023-08-04 08:12:44,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:12:44,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:12:44,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 749 transitions. [2023-08-04 08:12:44,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5147766323024054 [2023-08-04 08:12:44,372 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 749 transitions. [2023-08-04 08:12:44,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 749 transitions. [2023-08-04 08:12:44,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:12:44,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 749 transitions. [2023-08-04 08:12:44,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.66666666666666) internal successors, (749), 3 states have internal predecessors, (749), 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 08:12:44,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 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 08:12:44,378 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 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 08:12:44,379 INFO L175 Difference]: Start difference. First operand has 67 places, 97 transitions, 294 flow. Second operand 3 states and 749 transitions. [2023-08-04 08:12:44,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 106 transitions, 512 flow [2023-08-04 08:12:44,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 106 transitions, 508 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:12:44,385 INFO L231 Difference]: Finished difference. Result has 68 places, 97 transitions, 298 flow [2023-08-04 08:12:44,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=298, PETRI_PLACES=68, PETRI_TRANSITIONS=97} [2023-08-04 08:12:44,386 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -7 predicate places. [2023-08-04 08:12:44,386 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 97 transitions, 298 flow [2023-08-04 08:12:44,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.33333333333334) internal successors, (670), 3 states have internal predecessors, (670), 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 08:12:44,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:12:44,386 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] [2023-08-04 08:12:44,391 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 08:12:44,587 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 08:12:44,587 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:12:44,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:12:44,588 INFO L85 PathProgramCache]: Analyzing trace with hash -112218964, now seen corresponding path program 1 times [2023-08-04 08:12:44,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:12:44,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022538937] [2023-08-04 08:12:44,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:12:44,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:12:44,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:12:44,672 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 08:12:44,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:12:44,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022538937] [2023-08-04 08:12:44,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022538937] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:12:44,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390540915] [2023-08-04 08:12:44,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:12:44,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:12:44,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:12:44,681 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 08:12:44,715 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 08:12:44,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:12:44,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:12:44,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:12:44,804 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 08:12:44,804 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:12:44,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390540915] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:12:44,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:12:44,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:12:44,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618524033] [2023-08-04 08:12:44,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:12:44,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:12:44,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:12:44,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:12:44,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:12:44,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 485 [2023-08-04 08:12:44,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 97 transitions, 298 flow. Second operand has 3 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 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 08:12:44,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:12:44,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 485 [2023-08-04 08:12:44,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:12:48,866 INFO L124 PetriNetUnfolderBase]: 63594/81555 cut-off events. [2023-08-04 08:12:48,866 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-08-04 08:12:49,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168028 conditions, 81555 events. 63594/81555 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 1374. Compared 394924 event pairs, 23577 based on Foata normal form. 0/49282 useless extension candidates. Maximal degree in co-relation 100969. Up to 77230 conditions per place. [2023-08-04 08:12:49,234 INFO L140 encePairwiseOnDemand]: 482/485 looper letters, 99 selfloop transitions, 2 changer transitions 1/108 dead transitions. [2023-08-04 08:12:49,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 108 transitions, 524 flow [2023-08-04 08:12:49,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:12:49,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:12:49,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 751 transitions. [2023-08-04 08:12:49,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516151202749141 [2023-08-04 08:12:49,237 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 751 transitions. [2023-08-04 08:12:49,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 751 transitions. [2023-08-04 08:12:49,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:12:49,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 751 transitions. [2023-08-04 08:12:49,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.33333333333334) internal successors, (751), 3 states have internal predecessors, (751), 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 08:12:49,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 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 08:12:49,242 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 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 08:12:49,242 INFO L175 Difference]: Start difference. First operand has 68 places, 97 transitions, 298 flow. Second operand 3 states and 751 transitions. [2023-08-04 08:12:49,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 108 transitions, 524 flow [2023-08-04 08:12:49,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 108 transitions, 520 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:12:49,249 INFO L231 Difference]: Finished difference. Result has 69 places, 97 transitions, 302 flow [2023-08-04 08:12:49,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=302, PETRI_PLACES=69, PETRI_TRANSITIONS=97} [2023-08-04 08:12:49,250 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -6 predicate places. [2023-08-04 08:12:49,250 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 97 transitions, 302 flow [2023-08-04 08:12:49,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 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 08:12:49,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:12:49,251 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] [2023-08-04 08:12:49,258 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 08:12:49,456 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 08:12:49,456 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:12:49,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:12:49,457 INFO L85 PathProgramCache]: Analyzing trace with hash 584727008, now seen corresponding path program 1 times [2023-08-04 08:12:49,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:12:49,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120600809] [2023-08-04 08:12:49,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:12:49,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:12:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:12:49,525 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 08:12:49,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:12:49,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120600809] [2023-08-04 08:12:49,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120600809] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:12:49,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85981251] [2023-08-04 08:12:49,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:12:49,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:12:49,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:12:49,527 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 08:12:49,530 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 08:12:49,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:12:49,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:12:49,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:12:49,639 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 08:12:49,639 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:12:49,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85981251] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:12:49,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:12:49,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:12:49,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478900931] [2023-08-04 08:12:49,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:12:49,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:12:49,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:12:49,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:12:49,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:12:49,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 485 [2023-08-04 08:12:49,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 97 transitions, 302 flow. Second operand has 3 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 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 08:12:49,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:12:49,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 485 [2023-08-04 08:12:49,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:12:53,678 INFO L124 PetriNetUnfolderBase]: 63562/81523 cut-off events. [2023-08-04 08:12:53,678 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-04 08:12:53,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168053 conditions, 81523 events. 63562/81523 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 1294. Compared 391152 event pairs, 23692 based on Foata normal form. 0/49314 useless extension candidates. Maximal degree in co-relation 100981. Up to 76734 conditions per place. [2023-08-04 08:12:54,079 INFO L140 encePairwiseOnDemand]: 482/485 looper letters, 101 selfloop transitions, 2 changer transitions 1/110 dead transitions. [2023-08-04 08:12:54,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 110 transitions, 536 flow [2023-08-04 08:12:54,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:12:54,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:12:54,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 753 transitions. [2023-08-04 08:12:54,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175257731958763 [2023-08-04 08:12:54,081 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 753 transitions. [2023-08-04 08:12:54,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 753 transitions. [2023-08-04 08:12:54,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:12:54,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 753 transitions. [2023-08-04 08:12:54,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 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 08:12:54,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 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 08:12:54,087 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 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 08:12:54,087 INFO L175 Difference]: Start difference. First operand has 69 places, 97 transitions, 302 flow. Second operand 3 states and 753 transitions. [2023-08-04 08:12:54,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 110 transitions, 536 flow [2023-08-04 08:12:54,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 110 transitions, 532 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:12:54,096 INFO L231 Difference]: Finished difference. Result has 70 places, 97 transitions, 306 flow [2023-08-04 08:12:54,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=306, PETRI_PLACES=70, PETRI_TRANSITIONS=97} [2023-08-04 08:12:54,097 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -5 predicate places. [2023-08-04 08:12:54,097 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 97 transitions, 306 flow [2023-08-04 08:12:54,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 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 08:12:54,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:12:54,097 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] [2023-08-04 08:12:54,103 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 08:12:54,303 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 08:12:54,303 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:12:54,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:12:54,303 INFO L85 PathProgramCache]: Analyzing trace with hash 2013398053, now seen corresponding path program 1 times [2023-08-04 08:12:54,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:12:54,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027345606] [2023-08-04 08:12:54,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:12:54,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:12:54,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:12:54,367 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 08:12:54,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:12:54,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027345606] [2023-08-04 08:12:54,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027345606] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:12:54,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560527002] [2023-08-04 08:12:54,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:12:54,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:12:54,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:12:54,369 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 08:12:54,371 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 08:12:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:12:54,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:12:54,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:12:54,478 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 08:12:54,478 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:12:54,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560527002] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:12:54,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:12:54,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:12:54,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086946809] [2023-08-04 08:12:54,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:12:54,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:12:54,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:12:54,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:12:54,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:12:54,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 485 [2023-08-04 08:12:54,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 97 transitions, 306 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 08:12:54,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:12:54,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 485 [2023-08-04 08:12:54,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:12:57,953 INFO L124 PetriNetUnfolderBase]: 53578/68915 cut-off events. [2023-08-04 08:12:57,953 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2023-08-04 08:12:58,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143014 conditions, 68915 events. 53578/68915 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 1280. Compared 326895 event pairs, 22652 based on Foata normal form. 0/41666 useless extension candidates. Maximal degree in co-relation 88685. Up to 63838 conditions per place. [2023-08-04 08:12:58,246 INFO L140 encePairwiseOnDemand]: 482/485 looper letters, 109 selfloop transitions, 2 changer transitions 0/117 dead transitions. [2023-08-04 08:12:58,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 117 transitions, 580 flow [2023-08-04 08:12:58,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:12:58,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:12:58,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 760 transitions. [2023-08-04 08:12:58,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5223367697594502 [2023-08-04 08:12:58,248 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 760 transitions. [2023-08-04 08:12:58,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 760 transitions. [2023-08-04 08:12:58,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:12:58,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 760 transitions. [2023-08-04 08:12:58,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 253.33333333333334) internal successors, (760), 3 states have internal predecessors, (760), 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 08:12:58,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 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 08:12:58,252 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 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 08:12:58,252 INFO L175 Difference]: Start difference. First operand has 70 places, 97 transitions, 306 flow. Second operand 3 states and 760 transitions. [2023-08-04 08:12:58,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 117 transitions, 580 flow [2023-08-04 08:12:58,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 117 transitions, 576 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:12:58,259 INFO L231 Difference]: Finished difference. Result has 71 places, 98 transitions, 314 flow [2023-08-04 08:12:58,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=314, PETRI_PLACES=71, PETRI_TRANSITIONS=98} [2023-08-04 08:12:58,259 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -4 predicate places. [2023-08-04 08:12:58,260 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 98 transitions, 314 flow [2023-08-04 08:12:58,260 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 08:12:58,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:12:58,260 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] [2023-08-04 08:12:58,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 08:12:58,471 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 08:12:58,472 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:12:58,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:12:58,472 INFO L85 PathProgramCache]: Analyzing trace with hash -803721472, now seen corresponding path program 1 times [2023-08-04 08:12:58,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:12:58,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404703279] [2023-08-04 08:12:58,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:12:58,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:12:58,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:12:58,555 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 08:12:58,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:12:58,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404703279] [2023-08-04 08:12:58,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404703279] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:12:58,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033726558] [2023-08-04 08:12:58,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:12:58,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:12:58,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:12:58,557 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 08:12:58,560 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 08:12:58,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:12:58,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:12:58,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:12:58,669 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 08:12:58,669 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:12:58,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033726558] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:12:58,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:12:58,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:12:58,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868788091] [2023-08-04 08:12:58,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:12:58,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:12:58,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:12:58,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:12:58,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:12:58,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 485 [2023-08-04 08:12:58,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 98 transitions, 314 flow. Second operand has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 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 08:12:58,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:12:58,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 485 [2023-08-04 08:12:58,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:13:01,539 INFO L124 PetriNetUnfolderBase]: 43247/56348 cut-off events. [2023-08-04 08:13:01,540 INFO L125 PetriNetUnfolderBase]: For 747/747 co-relation queries the response was YES. [2023-08-04 08:13:01,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118964 conditions, 56348 events. 43247/56348 cut-off events. For 747/747 co-relation queries the response was YES. Maximal size of possible extension queue 1209. Compared 268932 event pairs, 16309 based on Foata normal form. 0/35086 useless extension candidates. Maximal degree in co-relation 76646. Up to 44814 conditions per place. [2023-08-04 08:13:01,829 INFO L140 encePairwiseOnDemand]: 482/485 looper letters, 110 selfloop transitions, 2 changer transitions 0/118 dead transitions. [2023-08-04 08:13:01,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 118 transitions, 590 flow [2023-08-04 08:13:01,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:13:01,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:13:01,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 760 transitions. [2023-08-04 08:13:01,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5223367697594502 [2023-08-04 08:13:01,831 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 760 transitions. [2023-08-04 08:13:01,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 760 transitions. [2023-08-04 08:13:01,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:13:01,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 760 transitions. [2023-08-04 08:13:01,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 253.33333333333334) internal successors, (760), 3 states have internal predecessors, (760), 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 08:13:01,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 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 08:13:01,835 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 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 08:13:01,836 INFO L175 Difference]: Start difference. First operand has 71 places, 98 transitions, 314 flow. Second operand 3 states and 760 transitions. [2023-08-04 08:13:01,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 118 transitions, 590 flow [2023-08-04 08:13:01,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 118 transitions, 588 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:13:01,845 INFO L231 Difference]: Finished difference. Result has 73 places, 99 transitions, 324 flow [2023-08-04 08:13:01,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=73, PETRI_TRANSITIONS=99} [2023-08-04 08:13:01,847 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -2 predicate places. [2023-08-04 08:13:01,847 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 99 transitions, 324 flow [2023-08-04 08:13:01,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 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 08:13:01,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:13:01,848 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] [2023-08-04 08:13:01,860 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 08:13:02,053 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 08:13:02,053 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:13:02,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:13:02,054 INFO L85 PathProgramCache]: Analyzing trace with hash 204780133, now seen corresponding path program 1 times [2023-08-04 08:13:02,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:13:02,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968919797] [2023-08-04 08:13:02,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:13:02,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:13:02,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:13:02,127 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 08:13:02,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:13:02,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968919797] [2023-08-04 08:13:02,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968919797] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:13:02,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409309897] [2023-08-04 08:13:02,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:13:02,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:13:02,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:13:02,130 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 08:13:02,132 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 08:13:02,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:13:02,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:13:02,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:13:02,253 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:13:02,253 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:13:02,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409309897] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:13:02,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:13:02,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:13:02,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21528413] [2023-08-04 08:13:02,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:13:02,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:13:02,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:13:02,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:13:02,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:13:02,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 485 [2023-08-04 08:13:02,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 99 transitions, 324 flow. Second operand has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 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 08:13:02,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:13:02,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 485 [2023-08-04 08:13:02,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:13:04,607 INFO L124 PetriNetUnfolderBase]: 35076/46149 cut-off events. [2023-08-04 08:13:04,607 INFO L125 PetriNetUnfolderBase]: For 2054/2054 co-relation queries the response was YES. [2023-08-04 08:13:04,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99965 conditions, 46149 events. 35076/46149 cut-off events. For 2054/2054 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 217375 event pairs, 14580 based on Foata normal form. 0/29722 useless extension candidates. Maximal degree in co-relation 65089. Up to 38766 conditions per place. [2023-08-04 08:13:04,845 INFO L140 encePairwiseOnDemand]: 482/485 looper letters, 111 selfloop transitions, 2 changer transitions 0/119 dead transitions. [2023-08-04 08:13:04,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 119 transitions, 602 flow [2023-08-04 08:13:04,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:13:04,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:13:04,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 760 transitions. [2023-08-04 08:13:04,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5223367697594502 [2023-08-04 08:13:04,847 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 760 transitions. [2023-08-04 08:13:04,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 760 transitions. [2023-08-04 08:13:04,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:13:04,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 760 transitions. [2023-08-04 08:13:04,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 253.33333333333334) internal successors, (760), 3 states have internal predecessors, (760), 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 08:13:04,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 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 08:13:04,851 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 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 08:13:04,851 INFO L175 Difference]: Start difference. First operand has 73 places, 99 transitions, 324 flow. Second operand 3 states and 760 transitions. [2023-08-04 08:13:04,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 119 transitions, 602 flow [2023-08-04 08:13:05,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 119 transitions, 600 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:13:05,203 INFO L231 Difference]: Finished difference. Result has 75 places, 100 transitions, 334 flow [2023-08-04 08:13:05,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=334, PETRI_PLACES=75, PETRI_TRANSITIONS=100} [2023-08-04 08:13:05,204 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 0 predicate places. [2023-08-04 08:13:05,204 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 100 transitions, 334 flow [2023-08-04 08:13:05,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 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 08:13:05,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:13:05,205 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, 1, 1, 1, 1] [2023-08-04 08:13:05,210 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 08:13:05,405 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 08:13:05,405 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:13:05,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:13:05,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1731588766, now seen corresponding path program 1 times [2023-08-04 08:13:05,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:13:05,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564320978] [2023-08-04 08:13:05,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:13:05,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:13:05,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:13:05,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:13:05,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:13:05,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564320978] [2023-08-04 08:13:05,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564320978] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:13:05,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636201207] [2023-08-04 08:13:05,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:13:05,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:13:05,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:13:05,504 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:13:05,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 08:13:05,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:13:05,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:13:05,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:13:05,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 08:13:05,650 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:13:05,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636201207] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:13:05,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:13:05,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:13:05,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771423770] [2023-08-04 08:13:05,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:13:05,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:13:05,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:13:05,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:13:05,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:13:05,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 485 [2023-08-04 08:13:05,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 100 transitions, 334 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 08:13:05,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:13:05,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 485 [2023-08-04 08:13:05,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:13:07,891 INFO L124 PetriNetUnfolderBase]: 32225/42430 cut-off events. [2023-08-04 08:13:07,891 INFO L125 PetriNetUnfolderBase]: For 2168/2168 co-relation queries the response was YES. [2023-08-04 08:13:07,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92993 conditions, 42430 events. 32225/42430 cut-off events. For 2168/2168 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 197176 event pairs, 14671 based on Foata normal form. 0/27898 useless extension candidates. Maximal degree in co-relation 66193. Up to 38514 conditions per place. [2023-08-04 08:13:08,087 INFO L140 encePairwiseOnDemand]: 482/485 looper letters, 112 selfloop transitions, 2 changer transitions 0/120 dead transitions. [2023-08-04 08:13:08,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 120 transitions, 614 flow [2023-08-04 08:13:08,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:13:08,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:13:08,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 760 transitions. [2023-08-04 08:13:08,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5223367697594502 [2023-08-04 08:13:08,090 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 760 transitions. [2023-08-04 08:13:08,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 760 transitions. [2023-08-04 08:13:08,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:13:08,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 760 transitions. [2023-08-04 08:13:08,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 253.33333333333334) internal successors, (760), 3 states have internal predecessors, (760), 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 08:13:08,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 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 08:13:08,094 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 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 08:13:08,095 INFO L175 Difference]: Start difference. First operand has 75 places, 100 transitions, 334 flow. Second operand 3 states and 760 transitions. [2023-08-04 08:13:08,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 120 transitions, 614 flow [2023-08-04 08:13:08,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 120 transitions, 612 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:13:08,297 INFO L231 Difference]: Finished difference. Result has 77 places, 101 transitions, 344 flow [2023-08-04 08:13:08,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=344, PETRI_PLACES=77, PETRI_TRANSITIONS=101} [2023-08-04 08:13:08,298 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 2 predicate places. [2023-08-04 08:13:08,298 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 101 transitions, 344 flow [2023-08-04 08:13:08,298 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 08:13:08,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:13:08,298 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:13:08,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 08:13:08,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-04 08:13:08,499 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:13:08,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:13:08,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1746211806, now seen corresponding path program 1 times [2023-08-04 08:13:08,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:13:08,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573101183] [2023-08-04 08:13:08,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:13:08,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:13:08,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:13:08,586 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 08:13:08,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:13:08,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573101183] [2023-08-04 08:13:08,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573101183] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:13:08,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414524171] [2023-08-04 08:13:08,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:13:08,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:13:08,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:13:08,587 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:13:08,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 08:13:08,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:13:08,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:13:08,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:13:08,712 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 08:13:08,713 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:13:08,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414524171] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:13:08,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:13:08,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:13:08,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137084950] [2023-08-04 08:13:08,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:13:08,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:13:08,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:13:08,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:13:08,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:13:08,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 485 [2023-08-04 08:13:08,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 101 transitions, 344 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 08:13:08,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:13:08,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 485 [2023-08-04 08:13:08,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:13:10,952 INFO L124 PetriNetUnfolderBase]: 31810/41839 cut-off events. [2023-08-04 08:13:10,952 INFO L125 PetriNetUnfolderBase]: For 2014/2014 co-relation queries the response was YES. [2023-08-04 08:13:11,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92001 conditions, 41839 events. 31810/41839 cut-off events. For 2014/2014 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 193776 event pairs, 15050 based on Foata normal form. 0/27674 useless extension candidates. Maximal degree in co-relation 84221. Up to 39574 conditions per place. [2023-08-04 08:13:11,148 INFO L140 encePairwiseOnDemand]: 482/485 looper letters, 113 selfloop transitions, 2 changer transitions 0/121 dead transitions. [2023-08-04 08:13:11,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 121 transitions, 626 flow [2023-08-04 08:13:11,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:13:11,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:13:11,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 760 transitions. [2023-08-04 08:13:11,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5223367697594502 [2023-08-04 08:13:11,150 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 760 transitions. [2023-08-04 08:13:11,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 760 transitions. [2023-08-04 08:13:11,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:13:11,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 760 transitions. [2023-08-04 08:13:11,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 253.33333333333334) internal successors, (760), 3 states have internal predecessors, (760), 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 08:13:11,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 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 08:13:11,154 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 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 08:13:11,154 INFO L175 Difference]: Start difference. First operand has 77 places, 101 transitions, 344 flow. Second operand 3 states and 760 transitions. [2023-08-04 08:13:11,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 121 transitions, 626 flow [2023-08-04 08:13:11,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 121 transitions, 624 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:13:11,325 INFO L231 Difference]: Finished difference. Result has 79 places, 102 transitions, 354 flow [2023-08-04 08:13:11,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=354, PETRI_PLACES=79, PETRI_TRANSITIONS=102} [2023-08-04 08:13:11,325 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 4 predicate places. [2023-08-04 08:13:11,325 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 102 transitions, 354 flow [2023-08-04 08:13:11,326 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 08:13:11,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:13:11,326 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:13:11,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 08:13:11,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-04 08:13:11,535 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:13:11,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:13:11,535 INFO L85 PathProgramCache]: Analyzing trace with hash -61294592, now seen corresponding path program 1 times [2023-08-04 08:13:11,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:13:11,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379411980] [2023-08-04 08:13:11,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:13:11,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:13:11,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:13:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 08:13:11,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:13:11,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379411980] [2023-08-04 08:13:11,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379411980] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:13:11,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838372753] [2023-08-04 08:13:11,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:13:11,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:13:11,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:13:11,621 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:13:11,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 08:13:11,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:13:11,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:13:11,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:13:11,956 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 08:13:11,957 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:13:11,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838372753] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:13:11,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:13:11,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 08:13:11,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723106187] [2023-08-04 08:13:11,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:13:11,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:13:11,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:13:11,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:13:11,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:13:11,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 485 [2023-08-04 08:13:11,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 102 transitions, 354 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 08:13:11,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:13:11,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 485 [2023-08-04 08:13:11,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:13:14,118 INFO L124 PetriNetUnfolderBase]: 31797/41816 cut-off events. [2023-08-04 08:13:14,118 INFO L125 PetriNetUnfolderBase]: For 1868/1868 co-relation queries the response was YES. [2023-08-04 08:13:14,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91996 conditions, 41816 events. 31797/41816 cut-off events. For 1868/1868 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 193643 event pairs, 15171 based on Foata normal form. 0/27682 useless extension candidates. Maximal degree in co-relation 90489. Up to 39983 conditions per place. [2023-08-04 08:13:14,268 INFO L140 encePairwiseOnDemand]: 482/485 looper letters, 101 selfloop transitions, 2 changer transitions 6/115 dead transitions. [2023-08-04 08:13:14,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 115 transitions, 598 flow [2023-08-04 08:13:14,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:13:14,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:13:14,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 753 transitions. [2023-08-04 08:13:14,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175257731958763 [2023-08-04 08:13:14,271 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 753 transitions. [2023-08-04 08:13:14,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 753 transitions. [2023-08-04 08:13:14,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:13:14,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 753 transitions. [2023-08-04 08:13:14,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 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 08:13:14,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 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 08:13:14,275 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 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 08:13:14,275 INFO L175 Difference]: Start difference. First operand has 79 places, 102 transitions, 354 flow. Second operand 3 states and 753 transitions. [2023-08-04 08:13:14,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 115 transitions, 598 flow [2023-08-04 08:13:14,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 115 transitions, 596 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:13:14,428 INFO L231 Difference]: Finished difference. Result has 81 places, 97 transitions, 340 flow [2023-08-04 08:13:14,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=340, PETRI_PLACES=81, PETRI_TRANSITIONS=97} [2023-08-04 08:13:14,429 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 6 predicate places. [2023-08-04 08:13:14,429 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 97 transitions, 340 flow [2023-08-04 08:13:14,430 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 08:13:14,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:13:14,430 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:13:14,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 08:13:14,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-04 08:13:14,636 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:13:14,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:13:14,636 INFO L85 PathProgramCache]: Analyzing trace with hash 831205619, now seen corresponding path program 1 times [2023-08-04 08:13:14,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:13:14,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061227914] [2023-08-04 08:13:14,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:13:14,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:13:14,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:13:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 08:13:14,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:13:14,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061227914] [2023-08-04 08:13:14,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061227914] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:13:14,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626955773] [2023-08-04 08:13:14,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:13:14,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:13:14,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:13:14,726 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:13:14,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 08:13:14,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:13:14,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:13:14,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:13:14,881 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 08:13:14,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:13:14,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 08:13:14,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626955773] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:13:14,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:13:14,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:13:14,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445960390] [2023-08-04 08:13:14,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:13:14,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:13:14,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:13:14,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:13:14,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:13:14,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 485 [2023-08-04 08:13:14,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 97 transitions, 340 flow. Second operand has 5 states, 5 states have (on average 227.0) internal successors, (1135), 5 states have internal predecessors, (1135), 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 08:13:14,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:13:14,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 485 [2023-08-04 08:13:14,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:13:14,936 INFO L124 PetriNetUnfolderBase]: 5/13 cut-off events. [2023-08-04 08:13:14,936 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:13:14,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 13 events. 5/13 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 event pairs, 0 based on Foata normal form. 2/12 useless extension candidates. Maximal degree in co-relation 29. Up to 8 conditions per place. [2023-08-04 08:13:14,936 INFO L140 encePairwiseOnDemand]: 482/485 looper letters, 0 selfloop transitions, 0 changer transitions 9/9 dead transitions. [2023-08-04 08:13:14,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 9 transitions, 40 flow [2023-08-04 08:13:14,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:13:14,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:13:14,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 870 transitions. [2023-08-04 08:13:14,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4484536082474227 [2023-08-04 08:13:14,939 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 870 transitions. [2023-08-04 08:13:14,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 870 transitions. [2023-08-04 08:13:14,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:13:14,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 870 transitions. [2023-08-04 08:13:14,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 217.5) internal successors, (870), 4 states have internal predecessors, (870), 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 08:13:14,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 485.0) internal successors, (2425), 5 states have internal predecessors, (2425), 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 08:13:14,944 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 485.0) internal successors, (2425), 5 states have internal predecessors, (2425), 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 08:13:14,944 INFO L175 Difference]: Start difference. First operand has 81 places, 97 transitions, 340 flow. Second operand 4 states and 870 transitions. [2023-08-04 08:13:14,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 9 transitions, 40 flow [2023-08-04 08:13:14,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 9 transitions, 38 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:13:14,944 INFO L231 Difference]: Finished difference. Result has 27 places, 0 transitions, 0 flow [2023-08-04 08:13:14,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=14, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=27, PETRI_TRANSITIONS=0} [2023-08-04 08:13:14,945 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -48 predicate places. [2023-08-04 08:13:14,945 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 0 transitions, 0 flow [2023-08-04 08:13:14,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 227.0) internal successors, (1135), 5 states have internal predecessors, (1135), 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 08:13:14,948 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:13:14,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 08:13:15,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 08:13:15,154 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:13:15,156 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:13:15,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 234 places, 283 transitions, 704 flow [2023-08-04 08:13:15,649 INFO L124 PetriNetUnfolderBase]: 1853/7807 cut-off events. [2023-08-04 08:13:15,649 INFO L125 PetriNetUnfolderBase]: For 1152/1152 co-relation queries the response was YES. [2023-08-04 08:13:15,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9155 conditions, 7807 events. 1853/7807 cut-off events. For 1152/1152 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 74612 event pairs, 0 based on Foata normal form. 0/6532 useless extension candidates. Maximal degree in co-relation 4468. Up to 193 conditions per place. [2023-08-04 08:13:15,679 INFO L82 GeneralOperation]: Start removeDead. Operand has 234 places, 283 transitions, 704 flow [2023-08-04 08:13:15,701 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 234 places, 283 transitions, 704 flow [2023-08-04 08:13:15,701 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:13:15,701 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 234 places, 283 transitions, 704 flow [2023-08-04 08:13:15,702 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 234 places, 283 transitions, 704 flow [2023-08-04 08:13:15,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 234 places, 283 transitions, 704 flow [2023-08-04 08:13:16,271 INFO L124 PetriNetUnfolderBase]: 1853/7807 cut-off events. [2023-08-04 08:13:16,271 INFO L125 PetriNetUnfolderBase]: For 1152/1152 co-relation queries the response was YES. [2023-08-04 08:13:16,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9155 conditions, 7807 events. 1853/7807 cut-off events. For 1152/1152 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 74612 event pairs, 0 based on Foata normal form. 0/6532 useless extension candidates. Maximal degree in co-relation 4468. Up to 193 conditions per place. [2023-08-04 08:13:16,378 INFO L119 LiptonReduction]: Number of co-enabled transitions 12240 [2023-08-04 08:13:20,979 INFO L134 LiptonReduction]: Checked pairs total: 48285 [2023-08-04 08:13:20,980 INFO L136 LiptonReduction]: Total number of compositions: 202 [2023-08-04 08:13:20,981 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:13:20,981 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;@3840dca5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:13:20,982 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-04 08:13:20,984 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:13:20,984 INFO L124 PetriNetUnfolderBase]: 4/31 cut-off events. [2023-08-04 08:13:20,984 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:13:20,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:13:20,984 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 08:13:20,984 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-04 08:13:20,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:13:20,985 INFO L85 PathProgramCache]: Analyzing trace with hash 405122091, now seen corresponding path program 1 times [2023-08-04 08:13:20,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:13:20,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486118683] [2023-08-04 08:13:20,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:13:20,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:13:21,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:13:21,010 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:13:21,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:13:21,047 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:13:21,047 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:13:21,047 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-04 08:13:21,047 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2023-08-04 08:13:21,048 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-08-04 08:13:21,048 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2023-08-04 08:13:21,048 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2023-08-04 08:13:21,048 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2023-08-04 08:13:21,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-04 08:13:21,048 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 08:13:21,048 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 08:13:21,049 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:13:21,049 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:13:21,100 INFO L144 ThreadInstanceAdder]: Constructed 72 joinOtherThreadTransitions. [2023-08-04 08:13:21,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 361 transitions, 1010 flow