/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 18:30:02,404 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 18:30:02,483 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 18:30:02,487 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 18:30:02,488 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 18:30:02,519 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 18:30:02,520 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 18:30:02,520 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 18:30:02,521 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 18:30:02,525 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 18:30:02,525 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 18:30:02,525 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 18:30:02,525 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 18:30:02,526 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 18:30:02,526 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 18:30:02,527 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 18:30:02,527 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 18:30:02,527 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 18:30:02,527 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 18:30:02,527 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 18:30:02,527 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 18:30:02,528 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 18:30:02,528 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 18:30:02,529 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 18:30:02,529 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 18:30:02,529 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 18:30:02,529 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 18:30:02,530 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:30:02,530 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 18:30:02,530 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 18:30:02,531 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 18:30:02,531 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 18:30:02,531 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 18:30:02,532 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 18:30:02,532 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 18:30:02,532 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 18:30:02,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 18:30:02,900 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 18:30:02,902 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 18:30:02,903 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 18:30:02,903 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 18:30:02,904 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2023-08-26 18:30:03,995 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 18:30:04,234 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 18:30:04,235 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2023-08-26 18:30:04,253 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/742bd88bd/0ccdad873709472ca189aac26c3dfb6b/FLAGb41ec9abd [2023-08-26 18:30:04,265 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/742bd88bd/0ccdad873709472ca189aac26c3dfb6b [2023-08-26 18:30:04,268 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 18:30:04,269 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 18:30:04,270 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 18:30:04,270 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 18:30:04,272 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 18:30:04,273 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:30:04" (1/1) ... [2023-08-26 18:30:04,274 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e794f0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:04, skipping insertion in model container [2023-08-26 18:30:04,274 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:30:04" (1/1) ... [2023-08-26 18:30:04,311 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 18:30:04,636 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:30:04,648 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 18:30:04,675 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 18:30:04,677 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 18:30:04,706 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:30:04,733 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 18:30:04,733 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 18:30:04,740 INFO L206 MainTranslator]: Completed translation [2023-08-26 18:30:04,740 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:04 WrapperNode [2023-08-26 18:30:04,740 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 18:30:04,741 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 18:30:04,742 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 18:30:04,742 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 18:30:04,748 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:04" (1/1) ... [2023-08-26 18:30:04,775 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:04" (1/1) ... [2023-08-26 18:30:04,800 INFO L138 Inliner]: procedures = 177, calls = 67, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 88 [2023-08-26 18:30:04,800 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 18:30:04,801 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 18:30:04,801 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 18:30:04,801 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 18:30:04,809 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:04" (1/1) ... [2023-08-26 18:30:04,809 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:04" (1/1) ... [2023-08-26 18:30:04,821 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:04" (1/1) ... [2023-08-26 18:30:04,822 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:04" (1/1) ... [2023-08-26 18:30:04,826 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:04" (1/1) ... [2023-08-26 18:30:04,828 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:04" (1/1) ... [2023-08-26 18:30:04,829 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:04" (1/1) ... [2023-08-26 18:30:04,830 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:04" (1/1) ... [2023-08-26 18:30:04,832 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 18:30:04,833 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 18:30:04,833 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 18:30:04,833 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 18:30:04,834 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:04" (1/1) ... [2023-08-26 18:30:04,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:30:04,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:30:04,878 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) [2023-08-26 18:30:04,902 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 [2023-08-26 18:30:04,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 18:30:04,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 18:30:04,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 18:30:04,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 18:30:04,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 18:30:04,915 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-26 18:30:04,915 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-26 18:30:04,915 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-26 18:30:04,915 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-26 18:30:04,915 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-26 18:30:04,915 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-26 18:30:04,915 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-26 18:30:04,916 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-26 18:30:04,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 18:30:04,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 18:30:04,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 18:30:04,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 18:30:04,919 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 18:30:05,071 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 18:30:05,073 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 18:30:05,272 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 18:30:05,278 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 18:30:05,278 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 18:30:05,280 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:30:05 BoogieIcfgContainer [2023-08-26 18:30:05,280 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 18:30:05,281 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 18:30:05,281 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 18:30:05,284 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 18:30:05,284 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 06:30:04" (1/3) ... [2023-08-26 18:30:05,285 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47b77cee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:30:05, skipping insertion in model container [2023-08-26 18:30:05,285 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:04" (2/3) ... [2023-08-26 18:30:05,285 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47b77cee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:30:05, skipping insertion in model container [2023-08-26 18:30:05,286 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:30:05" (3/3) ... [2023-08-26 18:30:05,286 INFO L112 eAbstractionObserver]: Analyzing ICFG thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2023-08-26 18:30:05,301 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 18:30:05,301 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-08-26 18:30:05,302 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 18:30:05,402 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 18:30:05,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 116 transitions, 252 flow [2023-08-26 18:30:05,506 INFO L124 PetriNetUnfolderBase]: 3/112 cut-off events. [2023-08-26 18:30:05,507 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:30:05,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 112 events. 3/112 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 98 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 91. Up to 2 conditions per place. [2023-08-26 18:30:05,512 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 116 transitions, 252 flow [2023-08-26 18:30:05,516 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 96 transitions, 204 flow [2023-08-26 18:30:05,519 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:30:05,530 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 96 transitions, 204 flow [2023-08-26 18:30:05,536 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 96 transitions, 204 flow [2023-08-26 18:30:05,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 96 transitions, 204 flow [2023-08-26 18:30:05,594 INFO L124 PetriNetUnfolderBase]: 1/96 cut-off events. [2023-08-26 18:30:05,594 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:30:05,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 96 events. 1/96 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 83 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 75. Up to 2 conditions per place. [2023-08-26 18:30:05,596 INFO L119 LiptonReduction]: Number of co-enabled transitions 1944 [2023-08-26 18:30:08,683 INFO L134 LiptonReduction]: Checked pairs total: 4158 [2023-08-26 18:30:08,683 INFO L136 LiptonReduction]: Total number of compositions: 92 [2023-08-26 18:30:08,702 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:30:08,706 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=false, 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;@7fddc6e5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:30:08,707 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2023-08-26 18:30:08,708 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:30:08,708 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 18:30:08,708 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:30:08,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:08,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 18:30:08,709 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 18:30:08,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:08,713 INFO L85 PathProgramCache]: Analyzing trace with hash 393, now seen corresponding path program 1 times [2023-08-26 18:30:08,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:08,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528476455] [2023-08-26 18:30:08,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:08,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:08,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:08,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:30:08,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:08,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528476455] [2023-08-26 18:30:08,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528476455] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:08,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:08,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 18:30:08,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022453241] [2023-08-26 18:30:08,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:08,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 18:30:08,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:08,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 18:30:08,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 18:30:08,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 208 [2023-08-26 18:30:08,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 31 transitions, 74 flow. Second operand has 2 states, 2 states have (on average 108.5) internal successors, (217), 2 states have internal predecessors, (217), 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) [2023-08-26 18:30:08,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:08,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 208 [2023-08-26 18:30:08,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:09,055 INFO L124 PetriNetUnfolderBase]: 704/1079 cut-off events. [2023-08-26 18:30:09,055 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-26 18:30:09,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2191 conditions, 1079 events. 704/1079 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 4982 event pairs, 704 based on Foata normal form. 0/1039 useless extension candidates. Maximal degree in co-relation 2179. Up to 1027 conditions per place. [2023-08-26 18:30:09,070 INFO L140 encePairwiseOnDemand]: 199/208 looper letters, 18 selfloop transitions, 0 changer transitions 0/22 dead transitions. [2023-08-26 18:30:09,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 22 transitions, 92 flow [2023-08-26 18:30:09,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 18:30:09,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 18:30:09,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 243 transitions. [2023-08-26 18:30:09,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5841346153846154 [2023-08-26 18:30:09,086 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 243 transitions. [2023-08-26 18:30:09,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 243 transitions. [2023-08-26 18:30:09,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:09,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 243 transitions. [2023-08-26 18:30:09,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 121.5) internal successors, (243), 2 states have internal predecessors, (243), 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) [2023-08-26 18:30:09,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 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) [2023-08-26 18:30:09,102 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 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) [2023-08-26 18:30:09,103 INFO L175 Difference]: Start difference. First operand has 43 places, 31 transitions, 74 flow. Second operand 2 states and 243 transitions. [2023-08-26 18:30:09,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 22 transitions, 92 flow [2023-08-26 18:30:09,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 22 transitions, 88 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 18:30:09,109 INFO L231 Difference]: Finished difference. Result has 32 places, 22 transitions, 52 flow [2023-08-26 18:30:09,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=52, PETRI_PLACES=32, PETRI_TRANSITIONS=22} [2023-08-26 18:30:09,114 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -11 predicate places. [2023-08-26 18:30:09,114 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 22 transitions, 52 flow [2023-08-26 18:30:09,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 108.5) internal successors, (217), 2 states have internal predecessors, (217), 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) [2023-08-26 18:30:09,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:09,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:30:09,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 18:30:09,115 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 18:30:09,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:09,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1596974363, now seen corresponding path program 1 times [2023-08-26 18:30:09,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:09,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37302164] [2023-08-26 18:30:09,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:09,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:09,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:09,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:30:09,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:09,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37302164] [2023-08-26 18:30:09,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37302164] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:09,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:09,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:30:09,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495824806] [2023-08-26 18:30:09,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:09,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:30:09,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:09,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:30:09,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:30:09,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 208 [2023-08-26 18:30:09,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 22 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 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) [2023-08-26 18:30:09,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:09,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 208 [2023-08-26 18:30:09,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:09,559 INFO L124 PetriNetUnfolderBase]: 700/1137 cut-off events. [2023-08-26 18:30:09,559 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:30:09,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2241 conditions, 1137 events. 700/1137 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5660 event pairs, 416 based on Foata normal form. 1/1138 useless extension candidates. Maximal degree in co-relation 2238. Up to 1013 conditions per place. [2023-08-26 18:30:09,566 INFO L140 encePairwiseOnDemand]: 202/208 looper letters, 24 selfloop transitions, 5 changer transitions 0/33 dead transitions. [2023-08-26 18:30:09,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 33 transitions, 138 flow [2023-08-26 18:30:09,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:30:09,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:30:09,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 327 transitions. [2023-08-26 18:30:09,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5240384615384616 [2023-08-26 18:30:09,569 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 327 transitions. [2023-08-26 18:30:09,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 327 transitions. [2023-08-26 18:30:09,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:09,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 327 transitions. [2023-08-26 18:30:09,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 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) [2023-08-26 18:30:09,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 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) [2023-08-26 18:30:09,573 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 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) [2023-08-26 18:30:09,573 INFO L175 Difference]: Start difference. First operand has 32 places, 22 transitions, 52 flow. Second operand 3 states and 327 transitions. [2023-08-26 18:30:09,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 33 transitions, 138 flow [2023-08-26 18:30:09,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 33 transitions, 138 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:30:09,575 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 85 flow [2023-08-26 18:30:09,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2023-08-26 18:30:09,575 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -8 predicate places. [2023-08-26 18:30:09,576 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 85 flow [2023-08-26 18:30:09,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 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) [2023-08-26 18:30:09,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:09,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:30:09,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 18:30:09,577 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 18:30:09,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:09,577 INFO L85 PathProgramCache]: Analyzing trace with hash -2033403399, now seen corresponding path program 1 times [2023-08-26 18:30:09,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:09,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324048443] [2023-08-26 18:30:09,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:09,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:09,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:30:09,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:09,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324048443] [2023-08-26 18:30:09,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324048443] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:09,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:09,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:30:09,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609040140] [2023-08-26 18:30:09,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:09,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:30:09,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:09,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:30:09,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:30:09,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 208 [2023-08-26 18:30:09,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 85 flow. Second operand has 4 states, 4 states have (on average 101.75) internal successors, (407), 4 states have internal predecessors, (407), 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) [2023-08-26 18:30:09,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:09,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 208 [2023-08-26 18:30:09,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:09,850 INFO L124 PetriNetUnfolderBase]: 623/998 cut-off events. [2023-08-26 18:30:09,850 INFO L125 PetriNetUnfolderBase]: For 203/203 co-relation queries the response was YES. [2023-08-26 18:30:09,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2414 conditions, 998 events. 623/998 cut-off events. For 203/203 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4728 event pairs, 201 based on Foata normal form. 26/1011 useless extension candidates. Maximal degree in co-relation 2409. Up to 568 conditions per place. [2023-08-26 18:30:09,857 INFO L140 encePairwiseOnDemand]: 205/208 looper letters, 26 selfloop transitions, 3 changer transitions 0/33 dead transitions. [2023-08-26 18:30:09,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 33 transitions, 163 flow [2023-08-26 18:30:09,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:30:09,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:30:09,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 323 transitions. [2023-08-26 18:30:09,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5176282051282052 [2023-08-26 18:30:09,859 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 323 transitions. [2023-08-26 18:30:09,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 323 transitions. [2023-08-26 18:30:09,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:09,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 323 transitions. [2023-08-26 18:30:09,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 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) [2023-08-26 18:30:09,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 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) [2023-08-26 18:30:09,863 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 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) [2023-08-26 18:30:09,863 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 85 flow. Second operand 3 states and 323 transitions. [2023-08-26 18:30:09,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 33 transitions, 163 flow [2023-08-26 18:30:09,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 33 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:30:09,864 INFO L231 Difference]: Finished difference. Result has 37 places, 26 transitions, 91 flow [2023-08-26 18:30:09,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=37, PETRI_TRANSITIONS=26} [2023-08-26 18:30:09,865 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -6 predicate places. [2023-08-26 18:30:09,865 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 91 flow [2023-08-26 18:30:09,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.75) internal successors, (407), 4 states have internal predecessors, (407), 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) [2023-08-26 18:30:09,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:09,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:30:09,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 18:30:09,867 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 18:30:09,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:09,867 INFO L85 PathProgramCache]: Analyzing trace with hash -2033403337, now seen corresponding path program 1 times [2023-08-26 18:30:09,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:09,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561613919] [2023-08-26 18:30:09,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:09,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:09,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:30:09,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:09,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561613919] [2023-08-26 18:30:09,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561613919] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:09,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:09,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:30:09,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031247350] [2023-08-26 18:30:09,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:09,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:30:09,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:09,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:30:09,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:30:09,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 208 [2023-08-26 18:30:09,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 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) [2023-08-26 18:30:09,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:09,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 208 [2023-08-26 18:30:09,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:10,086 INFO L124 PetriNetUnfolderBase]: 572/954 cut-off events. [2023-08-26 18:30:10,086 INFO L125 PetriNetUnfolderBase]: For 326/326 co-relation queries the response was YES. [2023-08-26 18:30:10,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2379 conditions, 954 events. 572/954 cut-off events. For 326/326 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4692 event pairs, 370 based on Foata normal form. 18/967 useless extension candidates. Maximal degree in co-relation 2373. Up to 659 conditions per place. [2023-08-26 18:30:10,093 INFO L140 encePairwiseOnDemand]: 205/208 looper letters, 32 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2023-08-26 18:30:10,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 39 transitions, 202 flow [2023-08-26 18:30:10,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:30:10,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:30:10,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 347 transitions. [2023-08-26 18:30:10,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5560897435897436 [2023-08-26 18:30:10,095 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 347 transitions. [2023-08-26 18:30:10,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 347 transitions. [2023-08-26 18:30:10,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:10,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 347 transitions. [2023-08-26 18:30:10,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 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) [2023-08-26 18:30:10,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 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) [2023-08-26 18:30:10,099 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 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) [2023-08-26 18:30:10,099 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 91 flow. Second operand 3 states and 347 transitions. [2023-08-26 18:30:10,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 39 transitions, 202 flow [2023-08-26 18:30:10,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 39 transitions, 194 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:30:10,101 INFO L231 Difference]: Finished difference. Result has 38 places, 26 transitions, 96 flow [2023-08-26 18:30:10,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=38, PETRI_TRANSITIONS=26} [2023-08-26 18:30:10,103 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -5 predicate places. [2023-08-26 18:30:10,103 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 26 transitions, 96 flow [2023-08-26 18:30:10,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 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) [2023-08-26 18:30:10,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:10,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:30:10,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 18:30:10,104 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 18:30:10,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:10,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1389003033, now seen corresponding path program 1 times [2023-08-26 18:30:10,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:10,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166931771] [2023-08-26 18:30:10,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:10,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:10,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:30:10,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:10,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166931771] [2023-08-26 18:30:10,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166931771] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:10,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:10,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:30:10,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728986325] [2023-08-26 18:30:10,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:10,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:30:10,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:10,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:30:10,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:30:10,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 208 [2023-08-26 18:30:10,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 26 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 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) [2023-08-26 18:30:10,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:10,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 208 [2023-08-26 18:30:10,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:10,397 INFO L124 PetriNetUnfolderBase]: 839/1304 cut-off events. [2023-08-26 18:30:10,398 INFO L125 PetriNetUnfolderBase]: For 787/787 co-relation queries the response was YES. [2023-08-26 18:30:10,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3403 conditions, 1304 events. 839/1304 cut-off events. For 787/787 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 6383 event pairs, 301 based on Foata normal form. 54/1345 useless extension candidates. Maximal degree in co-relation 3396. Up to 540 conditions per place. [2023-08-26 18:30:10,405 INFO L140 encePairwiseOnDemand]: 204/208 looper letters, 30 selfloop transitions, 3 changer transitions 4/40 dead transitions. [2023-08-26 18:30:10,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 40 transitions, 211 flow [2023-08-26 18:30:10,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:30:10,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:30:10,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 447 transitions. [2023-08-26 18:30:10,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5372596153846154 [2023-08-26 18:30:10,407 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 447 transitions. [2023-08-26 18:30:10,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 447 transitions. [2023-08-26 18:30:10,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:10,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 447 transitions. [2023-08-26 18:30:10,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 111.75) internal successors, (447), 4 states have internal predecessors, (447), 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) [2023-08-26 18:30:10,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 208.0) internal successors, (1040), 5 states have internal predecessors, (1040), 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) [2023-08-26 18:30:10,410 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 208.0) internal successors, (1040), 5 states have internal predecessors, (1040), 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) [2023-08-26 18:30:10,410 INFO L175 Difference]: Start difference. First operand has 38 places, 26 transitions, 96 flow. Second operand 4 states and 447 transitions. [2023-08-26 18:30:10,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 40 transitions, 211 flow [2023-08-26 18:30:10,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 40 transitions, 203 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:30:10,412 INFO L231 Difference]: Finished difference. Result has 41 places, 25 transitions, 99 flow [2023-08-26 18:30:10,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=99, PETRI_PLACES=41, PETRI_TRANSITIONS=25} [2023-08-26 18:30:10,413 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -2 predicate places. [2023-08-26 18:30:10,413 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 25 transitions, 99 flow [2023-08-26 18:30:10,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 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) [2023-08-26 18:30:10,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:10,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:30:10,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 18:30:10,414 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 18:30:10,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:10,414 INFO L85 PathProgramCache]: Analyzing trace with hash 70999183, now seen corresponding path program 1 times [2023-08-26 18:30:10,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:10,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755181609] [2023-08-26 18:30:10,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:10,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:10,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:30:10,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:10,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755181609] [2023-08-26 18:30:10,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755181609] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:10,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:10,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:30:10,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604663167] [2023-08-26 18:30:10,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:10,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:30:10,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:10,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:30:10,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:30:10,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 208 [2023-08-26 18:30:10,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 25 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 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) [2023-08-26 18:30:10,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:10,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 208 [2023-08-26 18:30:10,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:10,623 INFO L124 PetriNetUnfolderBase]: 330/557 cut-off events. [2023-08-26 18:30:10,624 INFO L125 PetriNetUnfolderBase]: For 638/638 co-relation queries the response was YES. [2023-08-26 18:30:10,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1543 conditions, 557 events. 330/557 cut-off events. For 638/638 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2415 event pairs, 216 based on Foata normal form. 12/548 useless extension candidates. Maximal degree in co-relation 1534. Up to 395 conditions per place. [2023-08-26 18:30:10,627 INFO L140 encePairwiseOnDemand]: 205/208 looper letters, 29 selfloop transitions, 3 changer transitions 0/36 dead transitions. [2023-08-26 18:30:10,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 36 transitions, 200 flow [2023-08-26 18:30:10,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:30:10,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:30:10,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 327 transitions. [2023-08-26 18:30:10,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5240384615384616 [2023-08-26 18:30:10,629 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 327 transitions. [2023-08-26 18:30:10,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 327 transitions. [2023-08-26 18:30:10,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:10,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 327 transitions. [2023-08-26 18:30:10,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 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) [2023-08-26 18:30:10,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 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) [2023-08-26 18:30:10,632 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 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) [2023-08-26 18:30:10,632 INFO L175 Difference]: Start difference. First operand has 41 places, 25 transitions, 99 flow. Second operand 3 states and 327 transitions. [2023-08-26 18:30:10,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 36 transitions, 200 flow [2023-08-26 18:30:10,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 36 transitions, 177 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-26 18:30:10,635 INFO L231 Difference]: Finished difference. Result has 38 places, 25 transitions, 91 flow [2023-08-26 18:30:10,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=38, PETRI_TRANSITIONS=25} [2023-08-26 18:30:10,636 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -5 predicate places. [2023-08-26 18:30:10,636 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 25 transitions, 91 flow [2023-08-26 18:30:10,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 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) [2023-08-26 18:30:10,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:10,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:30:10,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 18:30:10,637 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 18:30:10,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:10,637 INFO L85 PathProgramCache]: Analyzing trace with hash -900227030, now seen corresponding path program 1 times [2023-08-26 18:30:10,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:10,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985170838] [2023-08-26 18:30:10,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:10,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:10,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:10,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:30:10,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:10,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985170838] [2023-08-26 18:30:10,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985170838] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:10,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:10,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:30:10,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853695678] [2023-08-26 18:30:10,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:10,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:30:10,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:10,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:30:10,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:30:10,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 208 [2023-08-26 18:30:10,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 25 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 99.6) internal successors, (498), 5 states have internal predecessors, (498), 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) [2023-08-26 18:30:10,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:10,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 208 [2023-08-26 18:30:10,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:10,856 INFO L124 PetriNetUnfolderBase]: 549/886 cut-off events. [2023-08-26 18:30:10,857 INFO L125 PetriNetUnfolderBase]: For 609/609 co-relation queries the response was YES. [2023-08-26 18:30:10,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2323 conditions, 886 events. 549/886 cut-off events. For 609/609 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4143 event pairs, 171 based on Foata normal form. 32/903 useless extension candidates. Maximal degree in co-relation 2316. Up to 298 conditions per place. [2023-08-26 18:30:10,860 INFO L140 encePairwiseOnDemand]: 204/208 looper letters, 27 selfloop transitions, 3 changer transitions 8/41 dead transitions. [2023-08-26 18:30:10,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 41 transitions, 219 flow [2023-08-26 18:30:10,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:30:10,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:30:10,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 425 transitions. [2023-08-26 18:30:10,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108173076923077 [2023-08-26 18:30:10,863 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 425 transitions. [2023-08-26 18:30:10,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 425 transitions. [2023-08-26 18:30:10,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:10,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 425 transitions. [2023-08-26 18:30:10,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 106.25) internal successors, (425), 4 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:10,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 208.0) internal successors, (1040), 5 states have internal predecessors, (1040), 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) [2023-08-26 18:30:10,867 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 208.0) internal successors, (1040), 5 states have internal predecessors, (1040), 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) [2023-08-26 18:30:10,867 INFO L175 Difference]: Start difference. First operand has 38 places, 25 transitions, 91 flow. Second operand 4 states and 425 transitions. [2023-08-26 18:30:10,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 41 transitions, 219 flow [2023-08-26 18:30:10,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 41 transitions, 209 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:30:10,869 INFO L231 Difference]: Finished difference. Result has 41 places, 24 transitions, 95 flow [2023-08-26 18:30:10,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=41, PETRI_TRANSITIONS=24} [2023-08-26 18:30:10,870 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -2 predicate places. [2023-08-26 18:30:10,870 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 24 transitions, 95 flow [2023-08-26 18:30:10,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 99.6) internal successors, (498), 5 states have internal predecessors, (498), 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) [2023-08-26 18:30:10,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:10,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:30:10,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 18:30:10,871 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 18:30:10,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:10,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1017454493, now seen corresponding path program 1 times [2023-08-26 18:30:10,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:10,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019060193] [2023-08-26 18:30:10,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:10,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:10,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:30:10,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:10,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019060193] [2023-08-26 18:30:10,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019060193] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:10,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:10,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:30:10,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560766407] [2023-08-26 18:30:10,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:10,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:30:10,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:10,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:30:10,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:30:11,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 208 [2023-08-26 18:30:11,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 24 transitions, 95 flow. Second operand has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 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) [2023-08-26 18:30:11,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:11,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 208 [2023-08-26 18:30:11,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:11,106 INFO L124 PetriNetUnfolderBase]: 320/545 cut-off events. [2023-08-26 18:30:11,107 INFO L125 PetriNetUnfolderBase]: For 599/602 co-relation queries the response was YES. [2023-08-26 18:30:11,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1384 conditions, 545 events. 320/545 cut-off events. For 599/602 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2151 event pairs, 120 based on Foata normal form. 24/565 useless extension candidates. Maximal degree in co-relation 1375. Up to 229 conditions per place. [2023-08-26 18:30:11,109 INFO L140 encePairwiseOnDemand]: 204/208 looper letters, 23 selfloop transitions, 3 changer transitions 5/34 dead transitions. [2023-08-26 18:30:11,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 34 transitions, 180 flow [2023-08-26 18:30:11,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:30:11,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:30:11,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 419 transitions. [2023-08-26 18:30:11,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5036057692307693 [2023-08-26 18:30:11,111 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 419 transitions. [2023-08-26 18:30:11,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 419 transitions. [2023-08-26 18:30:11,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:11,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 419 transitions. [2023-08-26 18:30:11,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 104.75) internal successors, (419), 4 states have internal predecessors, (419), 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) [2023-08-26 18:30:11,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 208.0) internal successors, (1040), 5 states have internal predecessors, (1040), 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) [2023-08-26 18:30:11,114 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 208.0) internal successors, (1040), 5 states have internal predecessors, (1040), 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) [2023-08-26 18:30:11,114 INFO L175 Difference]: Start difference. First operand has 41 places, 24 transitions, 95 flow. Second operand 4 states and 419 transitions. [2023-08-26 18:30:11,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 34 transitions, 180 flow [2023-08-26 18:30:11,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 34 transitions, 168 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-26 18:30:11,115 INFO L231 Difference]: Finished difference. Result has 42 places, 22 transitions, 88 flow [2023-08-26 18:30:11,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=88, PETRI_PLACES=42, PETRI_TRANSITIONS=22} [2023-08-26 18:30:11,116 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2023-08-26 18:30:11,116 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 22 transitions, 88 flow [2023-08-26 18:30:11,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 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) [2023-08-26 18:30:11,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:11,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:30:11,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 18:30:11,117 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 18:30:11,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:11,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1096620521, now seen corresponding path program 1 times [2023-08-26 18:30:11,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:11,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631540911] [2023-08-26 18:30:11,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:11,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:11,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:11,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:30:11,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:11,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631540911] [2023-08-26 18:30:11,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631540911] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:11,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:11,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:30:11,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501376840] [2023-08-26 18:30:11,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:11,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:30:11,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:11,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:30:11,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:30:11,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 208 [2023-08-26 18:30:11,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 22 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 106.5) internal successors, (426), 4 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:11,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:11,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 208 [2023-08-26 18:30:11,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:11,265 INFO L124 PetriNetUnfolderBase]: 134/233 cut-off events. [2023-08-26 18:30:11,265 INFO L125 PetriNetUnfolderBase]: For 410/411 co-relation queries the response was YES. [2023-08-26 18:30:11,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 580 conditions, 233 events. 134/233 cut-off events. For 410/411 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 658 event pairs, 70 based on Foata normal form. 24/248 useless extension candidates. Maximal degree in co-relation 571. Up to 127 conditions per place. [2023-08-26 18:30:11,266 INFO L140 encePairwiseOnDemand]: 205/208 looper letters, 0 selfloop transitions, 0 changer transitions 25/25 dead transitions. [2023-08-26 18:30:11,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 25 transitions, 128 flow [2023-08-26 18:30:11,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:30:11,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:30:11,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 436 transitions. [2023-08-26 18:30:11,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5240384615384616 [2023-08-26 18:30:11,268 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 436 transitions. [2023-08-26 18:30:11,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 436 transitions. [2023-08-26 18:30:11,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:11,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 436 transitions. [2023-08-26 18:30:11,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 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) [2023-08-26 18:30:11,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 208.0) internal successors, (1040), 5 states have internal predecessors, (1040), 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) [2023-08-26 18:30:11,271 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 208.0) internal successors, (1040), 5 states have internal predecessors, (1040), 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) [2023-08-26 18:30:11,271 INFO L175 Difference]: Start difference. First operand has 42 places, 22 transitions, 88 flow. Second operand 4 states and 436 transitions. [2023-08-26 18:30:11,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 25 transitions, 128 flow [2023-08-26 18:30:11,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 25 transitions, 104 flow, removed 3 selfloop flow, removed 9 redundant places. [2023-08-26 18:30:11,272 INFO L231 Difference]: Finished difference. Result has 35 places, 0 transitions, 0 flow [2023-08-26 18:30:11,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=35, PETRI_TRANSITIONS=0} [2023-08-26 18:30:11,273 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -8 predicate places. [2023-08-26 18:30:11,273 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 0 transitions, 0 flow [2023-08-26 18:30:11,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.5) internal successors, (426), 4 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:11,275 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 13 remaining) [2023-08-26 18:30:11,276 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 13 remaining) [2023-08-26 18:30:11,276 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2023-08-26 18:30:11,276 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 13 remaining) [2023-08-26 18:30:11,276 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2023-08-26 18:30:11,276 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2023-08-26 18:30:11,276 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 13 remaining) [2023-08-26 18:30:11,276 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 13 remaining) [2023-08-26 18:30:11,276 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONASSERT (4 of 13 remaining) [2023-08-26 18:30:11,277 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 13 remaining) [2023-08-26 18:30:11,277 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 13 remaining) [2023-08-26 18:30:11,277 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 13 remaining) [2023-08-26 18:30:11,277 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 13 remaining) [2023-08-26 18:30:11,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 18:30:11,277 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:30:11,280 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 18:30:11,280 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 18:30:11,282 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 06:30:11 BasicIcfg [2023-08-26 18:30:11,283 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 18:30:11,283 INFO L158 Benchmark]: Toolchain (without parser) took 7014.40ms. Allocated memory was 392.2MB in the beginning and 576.7MB in the end (delta: 184.5MB). Free memory was 368.5MB in the beginning and 493.9MB in the end (delta: -125.4MB). Peak memory consumption was 60.2MB. Max. memory is 16.0GB. [2023-08-26 18:30:11,283 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 392.2MB. Free memory is still 369.4MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 18:30:11,283 INFO L158 Benchmark]: CACSL2BoogieTranslator took 471.10ms. Allocated memory is still 392.2MB. Free memory was 368.5MB in the beginning and 347.9MB in the end (delta: 20.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-26 18:30:11,284 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.05ms. Allocated memory is still 392.2MB. Free memory was 347.9MB in the beginning and 346.0MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 18:30:11,284 INFO L158 Benchmark]: Boogie Preprocessor took 31.50ms. Allocated memory is still 392.2MB. Free memory was 346.0MB in the beginning and 344.4MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 18:30:11,284 INFO L158 Benchmark]: RCFGBuilder took 446.84ms. Allocated memory is still 392.2MB. Free memory was 344.4MB in the beginning and 328.2MB in the end (delta: 16.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-26 18:30:11,285 INFO L158 Benchmark]: TraceAbstraction took 6001.22ms. Allocated memory was 392.2MB in the beginning and 576.7MB in the end (delta: 184.5MB). Free memory was 327.1MB in the beginning and 493.9MB in the end (delta: -166.8MB). Peak memory consumption was 18.3MB. Max. memory is 16.0GB. [2023-08-26 18:30:11,286 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 392.2MB. Free memory is still 369.4MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 471.10ms. Allocated memory is still 392.2MB. Free memory was 368.5MB in the beginning and 347.9MB in the end (delta: 20.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 59.05ms. Allocated memory is still 392.2MB. Free memory was 347.9MB in the beginning and 346.0MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 31.50ms. Allocated memory is still 392.2MB. Free memory was 346.0MB in the beginning and 344.4MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 446.84ms. Allocated memory is still 392.2MB. Free memory was 344.4MB in the beginning and 328.2MB in the end (delta: 16.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 6001.22ms. Allocated memory was 392.2MB in the beginning and 576.7MB in the end (delta: 184.5MB). Free memory was 327.1MB in the beginning and 493.9MB in the end (delta: -166.8MB). Peak memory consumption was 18.3MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.1s, 108 PlacesBefore, 43 PlacesAfterwards, 96 TransitionsBefore, 31 TransitionsAfterwards, 1944 CoEnabledTransitionPairs, 6 FixpointIterations, 27 TrivialSequentialCompositions, 59 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 0 ChoiceCompositions, 92 TotalNumberOfCompositions, 4158 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2351, independent: 2232, independent conditional: 0, independent unconditional: 2232, dependent: 119, dependent conditional: 0, dependent unconditional: 119, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1091, independent: 1055, independent conditional: 0, independent unconditional: 1055, dependent: 36, dependent conditional: 0, dependent unconditional: 36, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2351, independent: 1177, independent conditional: 0, independent unconditional: 1177, dependent: 83, dependent conditional: 0, dependent unconditional: 83, unknown: 1091, unknown conditional: 0, unknown unconditional: 1091] , Statistics on independence cache: Total cache size (in pairs): 113, Positive cache size: 100, Positive conditional cache size: 0, Positive unconditional cache size: 100, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 17]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 146 locations, 13 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5.8s, OverallIterations: 9, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 137 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 137 mSDsluCounter, 4 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 297 IncrementalHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 4 mSDtfsCounter, 297 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred in iteration=5, InterpolantAutomatonStates: 30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 105 NumberOfCodeBlocks, 105 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 96 ConstructedInterpolants, 0 QuantifiedInterpolants, 470 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 18:30:11,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...