/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 INSUFFICIENT_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/safe016_rmo.oepc.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 15:19:30,660 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 15:19:30,740 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 15:19:30,746 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 15:19:30,746 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 15:19:30,777 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 15:19:30,778 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 15:19:30,778 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 15:19:30,779 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 15:19:30,782 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 15:19:30,783 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 15:19:30,783 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 15:19:30,783 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 15:19:30,784 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 15:19:30,785 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 15:19:30,785 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 15:19:30,785 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 15:19:30,785 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 15:19:30,786 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 15:19:30,786 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 15:19:30,786 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 15:19:30,787 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 15:19:30,787 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 15:19:30,787 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 15:19:30,788 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 15:19:30,788 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 15:19:30,788 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 15:19:30,788 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:19:30,789 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 15:19:30,789 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 15:19:30,790 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 15:19:30,790 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 15:19:30,790 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 15:19:30,790 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 15:19:30,791 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 15:19:30,791 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 15:19:31,111 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 15:19:31,126 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 15:19:31,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 15:19:31,129 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 15:19:31,130 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 15:19:31,131 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe016_rmo.oepc.i [2023-08-26 15:19:32,394 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 15:19:32,669 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 15:19:32,669 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe016_rmo.oepc.i [2023-08-26 15:19:32,686 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98b39d002/5030fc283e2442889cb76f7030e5e2be/FLAG30225a14e [2023-08-26 15:19:32,696 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98b39d002/5030fc283e2442889cb76f7030e5e2be [2023-08-26 15:19:32,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 15:19:32,699 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 15:19:32,700 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 15:19:32,700 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 15:19:32,702 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 15:19:32,703 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:19:32" (1/1) ... [2023-08-26 15:19:32,703 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@245f8115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:32, skipping insertion in model container [2023-08-26 15:19:32,704 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:19:32" (1/1) ... [2023-08-26 15:19:32,746 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 15:19:33,143 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:19:33,157 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 15:19:33,184 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-26 15:19:33,186 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-26 15:19:33,225 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:19:33,262 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 15:19:33,262 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 15:19:33,268 INFO L206 MainTranslator]: Completed translation [2023-08-26 15:19:33,268 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:33 WrapperNode [2023-08-26 15:19:33,268 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 15:19:33,269 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 15:19:33,270 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 15:19:33,270 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 15:19:33,276 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:33" (1/1) ... [2023-08-26 15:19:33,303 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:33" (1/1) ... [2023-08-26 15:19:33,338 INFO L138 Inliner]: procedures = 177, calls = 86, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 191 [2023-08-26 15:19:33,339 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 15:19:33,340 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 15:19:33,340 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 15:19:33,340 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 15:19:33,348 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:33" (1/1) ... [2023-08-26 15:19:33,348 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:33" (1/1) ... [2023-08-26 15:19:33,364 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:33" (1/1) ... [2023-08-26 15:19:33,366 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:33" (1/1) ... [2023-08-26 15:19:33,377 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:33" (1/1) ... [2023-08-26 15:19:33,379 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:33" (1/1) ... [2023-08-26 15:19:33,382 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:33" (1/1) ... [2023-08-26 15:19:33,383 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:33" (1/1) ... [2023-08-26 15:19:33,389 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 15:19:33,390 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 15:19:33,390 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 15:19:33,390 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 15:19:33,391 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:33" (1/1) ... [2023-08-26 15:19:33,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:19:33,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:19:33,429 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 15:19:33,444 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 15:19:33,461 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 15:19:33,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 15:19:33,461 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 15:19:33,461 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 15:19:33,461 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 15:19:33,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 15:19:33,461 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-26 15:19:33,461 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-26 15:19:33,461 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-26 15:19:33,462 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-26 15:19:33,462 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-26 15:19:33,462 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-26 15:19:33,462 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-26 15:19:33,462 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-26 15:19:33,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 15:19:33,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 15:19:33,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 15:19:33,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 15:19:33,466 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 15:19:33,595 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 15:19:33,596 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 15:19:34,011 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 15:19:34,600 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 15:19:34,600 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 15:19:34,602 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:19:34 BoogieIcfgContainer [2023-08-26 15:19:34,602 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 15:19:34,605 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 15:19:34,605 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 15:19:34,608 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 15:19:34,608 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:19:32" (1/3) ... [2023-08-26 15:19:34,609 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e1113ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:19:34, skipping insertion in model container [2023-08-26 15:19:34,609 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:33" (2/3) ... [2023-08-26 15:19:34,610 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e1113ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:19:34, skipping insertion in model container [2023-08-26 15:19:34,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:19:34" (3/3) ... [2023-08-26 15:19:34,611 INFO L112 eAbstractionObserver]: Analyzing ICFG safe016_rmo.oepc.i [2023-08-26 15:19:34,627 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 15:19:34,628 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 51 error locations. [2023-08-26 15:19:34,628 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 15:19:34,791 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 15:19:34,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 196 transitions, 412 flow [2023-08-26 15:19:34,955 INFO L124 PetriNetUnfolderBase]: 3/192 cut-off events. [2023-08-26 15:19:34,955 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:19:34,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 192 events. 3/192 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 286 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 134. Up to 2 conditions per place. [2023-08-26 15:19:34,962 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 196 transitions, 412 flow [2023-08-26 15:19:34,972 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 202 places, 192 transitions, 396 flow [2023-08-26 15:19:34,976 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:19:34,989 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 202 places, 192 transitions, 396 flow [2023-08-26 15:19:34,993 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 202 places, 192 transitions, 396 flow [2023-08-26 15:19:34,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 192 transitions, 396 flow [2023-08-26 15:19:35,077 INFO L124 PetriNetUnfolderBase]: 3/192 cut-off events. [2023-08-26 15:19:35,078 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:19:35,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 192 events. 3/192 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 288 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 134. Up to 2 conditions per place. [2023-08-26 15:19:35,084 INFO L119 LiptonReduction]: Number of co-enabled transitions 8116 [2023-08-26 15:20:01,249 INFO L134 LiptonReduction]: Checked pairs total: 39435 [2023-08-26 15:20:01,249 INFO L136 LiptonReduction]: Total number of compositions: 155 [2023-08-26 15:20:01,260 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 15:20:01,265 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;@615a058f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:20:01,265 INFO L358 AbstractCegarLoop]: Starting to check reachability of 79 error locations. [2023-08-26 15:20:01,266 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:20:01,266 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 15:20:01,266 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:20:01,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:20:01,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 15:20:01,267 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 15:20:01,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:20:01,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1096, now seen corresponding path program 1 times [2023-08-26 15:20:01,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:20:01,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118515931] [2023-08-26 15:20:01,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:20:01,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:20:01,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:20:01,380 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 15:20:01,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:20:01,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118515931] [2023-08-26 15:20:01,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118515931] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:20:01,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:20:01,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 15:20:01,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197393088] [2023-08-26 15:20:01,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:20:01,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 15:20:01,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:20:01,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 15:20:01,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 15:20:01,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 351 [2023-08-26 15:20:01,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 85 transitions, 182 flow. Second operand has 2 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 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 15:20:01,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:20:01,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 351 [2023-08-26 15:20:01,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:20:12,680 INFO L124 PetriNetUnfolderBase]: 69742/91810 cut-off events. [2023-08-26 15:20:12,680 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-26 15:20:12,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183861 conditions, 91810 events. 69742/91810 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 6628. Compared 604691 event pairs, 69742 based on Foata normal form. 1200/48216 useless extension candidates. Maximal degree in co-relation 183849. Up to 91764 conditions per place. [2023-08-26 15:20:13,325 INFO L140 encePairwiseOnDemand]: 321/351 looper letters, 50 selfloop transitions, 0 changer transitions 0/54 dead transitions. [2023-08-26 15:20:13,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 54 transitions, 220 flow [2023-08-26 15:20:13,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 15:20:13,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 15:20:13,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 370 transitions. [2023-08-26 15:20:13,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5270655270655271 [2023-08-26 15:20:13,343 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 370 transitions. [2023-08-26 15:20:13,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 370 transitions. [2023-08-26 15:20:13,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:20:13,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 370 transitions. [2023-08-26 15:20:13,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 185.0) internal successors, (370), 2 states have internal predecessors, (370), 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 15:20:13,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 351.0) internal successors, (1053), 3 states have internal predecessors, (1053), 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 15:20:13,362 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 351.0) internal successors, (1053), 3 states have internal predecessors, (1053), 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 15:20:13,364 INFO L175 Difference]: Start difference. First operand has 96 places, 85 transitions, 182 flow. Second operand 2 states and 370 transitions. [2023-08-26 15:20:13,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 54 transitions, 220 flow [2023-08-26 15:20:13,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 54 transitions, 216 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 15:20:13,381 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 116 flow [2023-08-26 15:20:13,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=116, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2023-08-26 15:20:13,385 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -32 predicate places. [2023-08-26 15:20:13,386 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 116 flow [2023-08-26 15:20:13,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 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 15:20:13,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:20:13,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 15:20:13,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 15:20:13,387 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 15:20:13,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:20:13,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1080421, now seen corresponding path program 1 times [2023-08-26 15:20:13,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:20:13,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278113341] [2023-08-26 15:20:13,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:20:13,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:20:13,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:20:13,839 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 15:20:13,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:20:13,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278113341] [2023-08-26 15:20:13,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278113341] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:20:13,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:20:13,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:20:13,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723315249] [2023-08-26 15:20:13,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:20:13,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:20:13,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:20:13,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:20:13,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:20:13,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 351 [2023-08-26 15:20:13,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 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 15:20:13,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:20:13,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 351 [2023-08-26 15:20:13,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:20:21,474 INFO L124 PetriNetUnfolderBase]: 56695/76906 cut-off events. [2023-08-26 15:20:21,474 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:20:21,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153679 conditions, 76906 events. 56695/76906 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3456. Compared 491397 event pairs, 36791 based on Foata normal form. 0/49677 useless extension candidates. Maximal degree in co-relation 153676. Up to 49002 conditions per place. [2023-08-26 15:20:21,931 INFO L140 encePairwiseOnDemand]: 331/351 looper letters, 61 selfloop transitions, 10 changer transitions 0/72 dead transitions. [2023-08-26 15:20:21,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 72 transitions, 294 flow [2023-08-26 15:20:21,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:20:21,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:20:21,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 432 transitions. [2023-08-26 15:20:21,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41025641025641024 [2023-08-26 15:20:21,934 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 432 transitions. [2023-08-26 15:20:21,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 432 transitions. [2023-08-26 15:20:21,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:20:21,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 432 transitions. [2023-08-26 15:20:21,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 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 15:20:21,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 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 15:20:21,940 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 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 15:20:21,940 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 116 flow. Second operand 3 states and 432 transitions. [2023-08-26 15:20:21,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 72 transitions, 294 flow [2023-08-26 15:20:21,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 72 transitions, 294 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 15:20:21,943 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 196 flow [2023-08-26 15:20:21,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2023-08-26 15:20:21,944 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -31 predicate places. [2023-08-26 15:20:21,944 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 196 flow [2023-08-26 15:20:21,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 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 15:20:21,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:20:21,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 15:20:21,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 15:20:21,945 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 15:20:21,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:20:21,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1080422, now seen corresponding path program 1 times [2023-08-26 15:20:21,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:20:21,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842878268] [2023-08-26 15:20:21,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:20:21,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:20:21,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:20:22,107 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 15:20:22,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:20:22,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842878268] [2023-08-26 15:20:22,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842878268] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:20:22,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:20:22,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:20:22,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667123226] [2023-08-26 15:20:22,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:20:22,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:20:22,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:20:22,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:20:22,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:20:22,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 351 [2023-08-26 15:20:22,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 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 15:20:22,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:20:22,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 351 [2023-08-26 15:20:22,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:20:24,647 INFO L124 PetriNetUnfolderBase]: 16483/23232 cut-off events. [2023-08-26 15:20:24,648 INFO L125 PetriNetUnfolderBase]: For 5966/5966 co-relation queries the response was YES. [2023-08-26 15:20:24,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62633 conditions, 23232 events. 16483/23232 cut-off events. For 5966/5966 co-relation queries the response was YES. Maximal size of possible extension queue 1233. Compared 140593 event pairs, 13171 based on Foata normal form. 5655/27446 useless extension candidates. Maximal degree in co-relation 62628. Up to 22991 conditions per place. [2023-08-26 15:20:24,771 INFO L140 encePairwiseOnDemand]: 340/351 looper letters, 46 selfloop transitions, 1 changer transitions 1/49 dead transitions. [2023-08-26 15:20:24,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 49 transitions, 272 flow [2023-08-26 15:20:24,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:20:24,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:20:24,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 416 transitions. [2023-08-26 15:20:24,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3950617283950617 [2023-08-26 15:20:24,773 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 416 transitions. [2023-08-26 15:20:24,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 416 transitions. [2023-08-26 15:20:24,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:20:24,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 416 transitions. [2023-08-26 15:20:24,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 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 15:20:24,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 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 15:20:24,778 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 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 15:20:24,778 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 196 flow. Second operand 3 states and 416 transitions. [2023-08-26 15:20:24,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 49 transitions, 272 flow [2023-08-26 15:20:24,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 49 transitions, 252 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:20:24,829 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 156 flow [2023-08-26 15:20:24,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2023-08-26 15:20:24,830 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -41 predicate places. [2023-08-26 15:20:24,830 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 156 flow [2023-08-26 15:20:24,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 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 15:20:24,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:20:24,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:20:24,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 15:20:24,834 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 15:20:24,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:20:24,834 INFO L85 PathProgramCache]: Analyzing trace with hash -375358447, now seen corresponding path program 1 times [2023-08-26 15:20:24,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:20:24,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787917918] [2023-08-26 15:20:24,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:20:24,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:20:24,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:20:25,183 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 15:20:25,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:20:25,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787917918] [2023-08-26 15:20:25,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787917918] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:20:25,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:20:25,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:20:25,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182416175] [2023-08-26 15:20:25,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:20:25,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:20:25,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:20:25,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:20:25,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:20:25,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 351 [2023-08-26 15:20:25,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 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 15:20:25,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:20:25,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 351 [2023-08-26 15:20:25,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:20:28,090 INFO L124 PetriNetUnfolderBase]: 20593/28536 cut-off events. [2023-08-26 15:20:28,090 INFO L125 PetriNetUnfolderBase]: For 9323/9807 co-relation queries the response was YES. [2023-08-26 15:20:28,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71583 conditions, 28536 events. 20593/28536 cut-off events. For 9323/9807 co-relation queries the response was YES. Maximal size of possible extension queue 1411. Compared 180520 event pairs, 3228 based on Foata normal form. 136/24346 useless extension candidates. Maximal degree in co-relation 71578. Up to 24572 conditions per place. [2023-08-26 15:20:28,236 INFO L140 encePairwiseOnDemand]: 347/351 looper letters, 82 selfloop transitions, 3 changer transitions 0/88 dead transitions. [2023-08-26 15:20:28,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 88 transitions, 454 flow [2023-08-26 15:20:28,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:20:28,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:20:28,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 492 transitions. [2023-08-26 15:20:28,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4672364672364672 [2023-08-26 15:20:28,239 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 492 transitions. [2023-08-26 15:20:28,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 492 transitions. [2023-08-26 15:20:28,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:20:28,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 492 transitions. [2023-08-26 15:20:28,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 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 15:20:28,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 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 15:20:28,243 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 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 15:20:28,243 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 156 flow. Second operand 3 states and 492 transitions. [2023-08-26 15:20:28,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 88 transitions, 454 flow [2023-08-26 15:20:28,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 88 transitions, 453 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:20:28,246 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 174 flow [2023-08-26 15:20:28,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2023-08-26 15:20:28,247 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -40 predicate places. [2023-08-26 15:20:28,247 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 174 flow [2023-08-26 15:20:28,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 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 15:20:28,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:20:28,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:20:28,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 15:20:28,248 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 15:20:28,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:20:28,248 INFO L85 PathProgramCache]: Analyzing trace with hash -375358791, now seen corresponding path program 1 times [2023-08-26 15:20:28,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:20:28,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400983338] [2023-08-26 15:20:28,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:20:28,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:20:28,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:20:28,355 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 15:20:28,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:20:28,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400983338] [2023-08-26 15:20:28,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400983338] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:20:28,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:20:28,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:20:28,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095070629] [2023-08-26 15:20:28,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:20:28,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:20:28,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:20:28,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:20:28,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:20:28,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 351 [2023-08-26 15:20:28,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 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 15:20:28,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:20:28,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 351 [2023-08-26 15:20:28,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:20:30,870 INFO L124 PetriNetUnfolderBase]: 18150/25775 cut-off events. [2023-08-26 15:20:30,870 INFO L125 PetriNetUnfolderBase]: For 6122/6333 co-relation queries the response was YES. [2023-08-26 15:20:30,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68502 conditions, 25775 events. 18150/25775 cut-off events. For 6122/6333 co-relation queries the response was YES. Maximal size of possible extension queue 1308. Compared 161268 event pairs, 8009 based on Foata normal form. 0/22031 useless extension candidates. Maximal degree in co-relation 68496. Up to 16392 conditions per place. [2023-08-26 15:20:31,043 INFO L140 encePairwiseOnDemand]: 347/351 looper letters, 78 selfloop transitions, 3 changer transitions 0/86 dead transitions. [2023-08-26 15:20:31,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 86 transitions, 455 flow [2023-08-26 15:20:31,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:20:31,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:20:31,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 501 transitions. [2023-08-26 15:20:31,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4757834757834758 [2023-08-26 15:20:31,045 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 501 transitions. [2023-08-26 15:20:31,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 501 transitions. [2023-08-26 15:20:31,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:20:31,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 501 transitions. [2023-08-26 15:20:31,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 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 15:20:31,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 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 15:20:31,049 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 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 15:20:31,049 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 174 flow. Second operand 3 states and 501 transitions. [2023-08-26 15:20:31,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 86 transitions, 455 flow [2023-08-26 15:20:31,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 86 transitions, 451 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:20:31,052 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 184 flow [2023-08-26 15:20:31,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2023-08-26 15:20:31,052 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -38 predicate places. [2023-08-26 15:20:31,052 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 184 flow [2023-08-26 15:20:31,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 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 15:20:31,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:20:31,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:20:31,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 15:20:31,053 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 15:20:31,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:20:31,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1248787908, now seen corresponding path program 1 times [2023-08-26 15:20:31,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:20:31,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976574436] [2023-08-26 15:20:31,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:20:31,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:20:31,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:20:31,200 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 15:20:31,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:20:31,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976574436] [2023-08-26 15:20:31,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976574436] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:20:31,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:20:31,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:20:31,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154535491] [2023-08-26 15:20:31,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:20:31,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:20:31,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:20:31,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:20:31,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:20:31,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 351 [2023-08-26 15:20:31,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 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 15:20:31,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:20:31,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 351 [2023-08-26 15:20:31,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:20:33,960 INFO L124 PetriNetUnfolderBase]: 20637/29354 cut-off events. [2023-08-26 15:20:33,960 INFO L125 PetriNetUnfolderBase]: For 8620/8620 co-relation queries the response was YES. [2023-08-26 15:20:34,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80164 conditions, 29354 events. 20637/29354 cut-off events. For 8620/8620 co-relation queries the response was YES. Maximal size of possible extension queue 1509. Compared 185308 event pairs, 8987 based on Foata normal form. 0/26834 useless extension candidates. Maximal degree in co-relation 80157. Up to 19466 conditions per place. [2023-08-26 15:20:34,120 INFO L140 encePairwiseOnDemand]: 345/351 looper letters, 69 selfloop transitions, 6 changer transitions 0/77 dead transitions. [2023-08-26 15:20:34,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 77 transitions, 414 flow [2023-08-26 15:20:34,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:20:34,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:20:34,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 414 transitions. [2023-08-26 15:20:34,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39316239316239315 [2023-08-26 15:20:34,122 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 414 transitions. [2023-08-26 15:20:34,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 414 transitions. [2023-08-26 15:20:34,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:20:34,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 414 transitions. [2023-08-26 15:20:34,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 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 15:20:34,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 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 15:20:34,126 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 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 15:20:34,126 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 184 flow. Second operand 3 states and 414 transitions. [2023-08-26 15:20:34,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 77 transitions, 414 flow [2023-08-26 15:20:34,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 77 transitions, 408 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:20:34,134 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 216 flow [2023-08-26 15:20:34,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2023-08-26 15:20:34,135 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -38 predicate places. [2023-08-26 15:20:34,135 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 216 flow [2023-08-26 15:20:34,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 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 15:20:34,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:20:34,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:20:34,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 15:20:34,136 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 15:20:34,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:20:34,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1248787909, now seen corresponding path program 1 times [2023-08-26 15:20:34,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:20:34,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318656864] [2023-08-26 15:20:34,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:20:34,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:20:34,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:20:34,457 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 15:20:34,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:20:34,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318656864] [2023-08-26 15:20:34,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318656864] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:20:34,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:20:34,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:20:34,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284976491] [2023-08-26 15:20:34,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:20:34,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:20:34,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:20:34,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:20:34,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 15:20:34,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 351 [2023-08-26 15:20:34,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 216 flow. Second operand has 4 states, 4 states have (on average 124.75) internal successors, (499), 4 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 15:20:34,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:20:34,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 351 [2023-08-26 15:20:34,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:20:38,308 INFO L124 PetriNetUnfolderBase]: 29987/42596 cut-off events. [2023-08-26 15:20:38,309 INFO L125 PetriNetUnfolderBase]: For 19469/19469 co-relation queries the response was YES. [2023-08-26 15:20:38,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120318 conditions, 42596 events. 29987/42596 cut-off events. For 19469/19469 co-relation queries the response was YES. Maximal size of possible extension queue 2220. Compared 281008 event pairs, 15561 based on Foata normal form. 160/38796 useless extension candidates. Maximal degree in co-relation 120310. Up to 21927 conditions per place. [2023-08-26 15:20:38,577 INFO L140 encePairwiseOnDemand]: 345/351 looper letters, 86 selfloop transitions, 6 changer transitions 0/94 dead transitions. [2023-08-26 15:20:38,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 94 transitions, 545 flow [2023-08-26 15:20:38,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:20:38,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:20:38,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 556 transitions. [2023-08-26 15:20:38,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396011396011396 [2023-08-26 15:20:38,580 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 556 transitions. [2023-08-26 15:20:38,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 556 transitions. [2023-08-26 15:20:38,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:20:38,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 556 transitions. [2023-08-26 15:20:38,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 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 15:20:38,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 351.0) internal successors, (1755), 5 states have internal predecessors, (1755), 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 15:20:38,584 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 351.0) internal successors, (1755), 5 states have internal predecessors, (1755), 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 15:20:38,584 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 216 flow. Second operand 4 states and 556 transitions. [2023-08-26 15:20:38,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 94 transitions, 545 flow [2023-08-26 15:20:38,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 94 transitions, 538 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:20:38,888 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 241 flow [2023-08-26 15:20:38,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=241, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2023-08-26 15:20:38,889 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -35 predicate places. [2023-08-26 15:20:38,889 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 241 flow [2023-08-26 15:20:38,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.75) internal successors, (499), 4 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 15:20:38,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:20:38,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:20:38,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 15:20:38,890 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 15:20:38,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:20:38,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1227267103, now seen corresponding path program 2 times [2023-08-26 15:20:38,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:20:38,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601492639] [2023-08-26 15:20:38,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:20:38,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:20:38,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:20:39,470 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 15:20:39,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:20:39,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601492639] [2023-08-26 15:20:39,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601492639] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:20:39,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:20:39,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:20:39,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394307589] [2023-08-26 15:20:39,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:20:39,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 15:20:39,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:20:39,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 15:20:39,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 15:20:39,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 351 [2023-08-26 15:20:39,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 241 flow. Second operand has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 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 15:20:39,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:20:39,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 351 [2023-08-26 15:20:39,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:20:43,260 INFO L124 PetriNetUnfolderBase]: 29558/42007 cut-off events. [2023-08-26 15:20:43,260 INFO L125 PetriNetUnfolderBase]: For 24139/24139 co-relation queries the response was YES. [2023-08-26 15:20:43,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118722 conditions, 42007 events. 29558/42007 cut-off events. For 24139/24139 co-relation queries the response was YES. Maximal size of possible extension queue 2210. Compared 277118 event pairs, 14191 based on Foata normal form. 160/38206 useless extension candidates. Maximal degree in co-relation 118713. Up to 32868 conditions per place. [2023-08-26 15:20:43,471 INFO L140 encePairwiseOnDemand]: 348/351 looper letters, 87 selfloop transitions, 3 changer transitions 0/92 dead transitions. [2023-08-26 15:20:43,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 92 transitions, 549 flow [2023-08-26 15:20:43,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:20:43,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:20:43,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 546 transitions. [2023-08-26 15:20:43,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2023-08-26 15:20:43,473 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 546 transitions. [2023-08-26 15:20:43,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 546 transitions. [2023-08-26 15:20:43,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:20:43,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 546 transitions. [2023-08-26 15:20:43,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 136.5) internal successors, (546), 4 states have internal predecessors, (546), 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 15:20:43,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 351.0) internal successors, (1755), 5 states have internal predecessors, (1755), 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 15:20:43,476 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 351.0) internal successors, (1755), 5 states have internal predecessors, (1755), 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 15:20:43,476 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 241 flow. Second operand 4 states and 546 transitions. [2023-08-26 15:20:43,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 92 transitions, 549 flow [2023-08-26 15:20:43,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 92 transitions, 539 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 15:20:43,537 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 231 flow [2023-08-26 15:20:43,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=231, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2023-08-26 15:20:43,538 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -36 predicate places. [2023-08-26 15:20:43,538 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 231 flow [2023-08-26 15:20:43,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 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 15:20:43,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:20:43,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:20:43,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 15:20:43,539 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 15:20:43,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:20:43,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1489263923, now seen corresponding path program 1 times [2023-08-26 15:20:43,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:20:43,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554558771] [2023-08-26 15:20:43,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:20:43,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:20:43,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:20:44,863 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 15:20:44,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:20:44,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554558771] [2023-08-26 15:20:44,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554558771] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:20:44,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:20:44,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 15:20:44,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174749976] [2023-08-26 15:20:44,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:20:44,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 15:20:44,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:20:44,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 15:20:44,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-08-26 15:20:44,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 351 [2023-08-26 15:20:44,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 231 flow. Second operand has 9 states, 9 states have (on average 103.66666666666667) internal successors, (933), 9 states have internal predecessors, (933), 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 15:20:44,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:20:44,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 351 [2023-08-26 15:20:44,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:20:48,759 INFO L124 PetriNetUnfolderBase]: 29289/41605 cut-off events. [2023-08-26 15:20:48,760 INFO L125 PetriNetUnfolderBase]: For 24097/24097 co-relation queries the response was YES. [2023-08-26 15:20:48,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117855 conditions, 41605 events. 29289/41605 cut-off events. For 24097/24097 co-relation queries the response was YES. Maximal size of possible extension queue 2177. Compared 273001 event pairs, 17730 based on Foata normal form. 2/37646 useless extension candidates. Maximal degree in co-relation 117847. Up to 40778 conditions per place. [2023-08-26 15:20:48,973 INFO L140 encePairwiseOnDemand]: 341/351 looper letters, 76 selfloop transitions, 19 changer transitions 0/97 dead transitions. [2023-08-26 15:20:48,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 97 transitions, 597 flow [2023-08-26 15:20:48,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 15:20:48,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 15:20:48,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 897 transitions. [2023-08-26 15:20:48,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3194444444444444 [2023-08-26 15:20:48,977 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 897 transitions. [2023-08-26 15:20:48,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 897 transitions. [2023-08-26 15:20:48,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:20:48,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 897 transitions. [2023-08-26 15:20:48,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 112.125) internal successors, (897), 8 states have internal predecessors, (897), 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 15:20:48,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 351.0) internal successors, (3159), 9 states have internal predecessors, (3159), 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 15:20:48,983 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 351.0) internal successors, (3159), 9 states have internal predecessors, (3159), 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 15:20:48,983 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 231 flow. Second operand 8 states and 897 transitions. [2023-08-26 15:20:48,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 97 transitions, 597 flow [2023-08-26 15:20:49,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 97 transitions, 587 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:20:49,023 INFO L231 Difference]: Finished difference. Result has 69 places, 72 transitions, 394 flow [2023-08-26 15:20:49,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=394, PETRI_PLACES=69, PETRI_TRANSITIONS=72} [2023-08-26 15:20:49,024 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -27 predicate places. [2023-08-26 15:20:49,024 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 72 transitions, 394 flow [2023-08-26 15:20:49,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 103.66666666666667) internal successors, (933), 9 states have internal predecessors, (933), 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 15:20:49,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:20:49,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:20:49,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 15:20:49,025 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 15:20:49,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:20:49,025 INFO L85 PathProgramCache]: Analyzing trace with hash -425802077, now seen corresponding path program 1 times [2023-08-26 15:20:49,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:20:49,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509968180] [2023-08-26 15:20:49,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:20:49,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:20:49,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:20:49,415 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 15:20:49,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:20:49,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509968180] [2023-08-26 15:20:49,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509968180] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:20:49,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:20:49,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:20:49,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067611380] [2023-08-26 15:20:49,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:20:49,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:20:49,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:20:49,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:20:49,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 15:20:49,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 351 [2023-08-26 15:20:49,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 72 transitions, 394 flow. Second operand has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 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 15:20:49,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:20:49,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 351 [2023-08-26 15:20:49,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:20:53,618 INFO L124 PetriNetUnfolderBase]: 32432/46223 cut-off events. [2023-08-26 15:20:53,618 INFO L125 PetriNetUnfolderBase]: For 36752/36906 co-relation queries the response was YES. [2023-08-26 15:20:53,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138067 conditions, 46223 events. 32432/46223 cut-off events. For 36752/36906 co-relation queries the response was YES. Maximal size of possible extension queue 2172. Compared 307631 event pairs, 7248 based on Foata normal form. 102/42546 useless extension candidates. Maximal degree in co-relation 138055. Up to 37738 conditions per place. [2023-08-26 15:20:53,928 INFO L140 encePairwiseOnDemand]: 346/351 looper letters, 129 selfloop transitions, 10 changer transitions 0/142 dead transitions. [2023-08-26 15:20:53,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 142 transitions, 984 flow [2023-08-26 15:20:53,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:20:53,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:20:53,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 646 transitions. [2023-08-26 15:20:53,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4601139601139601 [2023-08-26 15:20:53,930 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 646 transitions. [2023-08-26 15:20:53,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 646 transitions. [2023-08-26 15:20:53,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:20:53,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 646 transitions. [2023-08-26 15:20:53,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 161.5) internal successors, (646), 4 states have internal predecessors, (646), 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 15:20:53,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 351.0) internal successors, (1755), 5 states have internal predecessors, (1755), 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 15:20:53,934 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 351.0) internal successors, (1755), 5 states have internal predecessors, (1755), 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 15:20:53,934 INFO L175 Difference]: Start difference. First operand has 69 places, 72 transitions, 394 flow. Second operand 4 states and 646 transitions. [2023-08-26 15:20:53,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 142 transitions, 984 flow [2023-08-26 15:20:54,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 142 transitions, 966 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-08-26 15:20:54,078 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 435 flow [2023-08-26 15:20:54,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=435, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2023-08-26 15:20:54,079 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -22 predicate places. [2023-08-26 15:20:54,079 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 435 flow [2023-08-26 15:20:54,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 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 15:20:54,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:20:54,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:20:54,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 15:20:54,080 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 15:20:54,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:20:54,080 INFO L85 PathProgramCache]: Analyzing trace with hash -153658472, now seen corresponding path program 1 times [2023-08-26 15:20:54,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:20:54,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384136170] [2023-08-26 15:20:54,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:20:54,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:20:54,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:20:54,570 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 15:20:54,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:20:54,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384136170] [2023-08-26 15:20:54,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384136170] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:20:54,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:20:54,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:20:54,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464669999] [2023-08-26 15:20:54,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:20:54,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:20:54,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:20:54,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:20:54,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:20:54,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 351 [2023-08-26 15:20:54,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 435 flow. Second operand has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 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 15:20:54,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:20:54,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 351 [2023-08-26 15:20:54,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:20:58,622 INFO L124 PetriNetUnfolderBase]: 29500/42873 cut-off events. [2023-08-26 15:20:58,622 INFO L125 PetriNetUnfolderBase]: For 41468/41777 co-relation queries the response was YES. [2023-08-26 15:20:58,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134833 conditions, 42873 events. 29500/42873 cut-off events. For 41468/41777 co-relation queries the response was YES. Maximal size of possible extension queue 2186. Compared 294210 event pairs, 16684 based on Foata normal form. 165/39264 useless extension candidates. Maximal degree in co-relation 134818. Up to 33015 conditions per place. [2023-08-26 15:20:58,905 INFO L140 encePairwiseOnDemand]: 348/351 looper letters, 92 selfloop transitions, 9 changer transitions 0/108 dead transitions. [2023-08-26 15:20:58,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 108 transitions, 764 flow [2023-08-26 15:20:58,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:20:58,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:20:58,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 494 transitions. [2023-08-26 15:20:58,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4691358024691358 [2023-08-26 15:20:58,907 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 494 transitions. [2023-08-26 15:20:58,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 494 transitions. [2023-08-26 15:20:58,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:20:58,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 494 transitions. [2023-08-26 15:20:58,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 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 15:20:58,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 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 15:20:58,910 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 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 15:20:58,910 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 435 flow. Second operand 3 states and 494 transitions. [2023-08-26 15:20:58,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 108 transitions, 764 flow [2023-08-26 15:20:59,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 108 transitions, 754 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-26 15:20:59,086 INFO L231 Difference]: Finished difference. Result has 76 places, 76 transitions, 455 flow [2023-08-26 15:20:59,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=455, PETRI_PLACES=76, PETRI_TRANSITIONS=76} [2023-08-26 15:20:59,086 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -20 predicate places. [2023-08-26 15:20:59,086 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 76 transitions, 455 flow [2023-08-26 15:20:59,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 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 15:20:59,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:20:59,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:20:59,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 15:20:59,087 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting P3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 15:20:59,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:20:59,087 INFO L85 PathProgramCache]: Analyzing trace with hash 57803208, now seen corresponding path program 1 times [2023-08-26 15:20:59,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:20:59,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738058566] [2023-08-26 15:20:59,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:20:59,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:20:59,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:20:59,236 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 15:20:59,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:20:59,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738058566] [2023-08-26 15:20:59,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738058566] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:20:59,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:20:59,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:20:59,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360519177] [2023-08-26 15:20:59,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:20:59,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 15:20:59,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:20:59,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 15:20:59,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 15:20:59,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 351 [2023-08-26 15:20:59,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 76 transitions, 455 flow. Second operand has 5 states, 5 states have (on average 117.2) internal successors, (586), 5 states have internal predecessors, (586), 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 15:20:59,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:20:59,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 351 [2023-08-26 15:20:59,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:21:02,917 INFO L124 PetriNetUnfolderBase]: 27052/38725 cut-off events. [2023-08-26 15:21:02,918 INFO L125 PetriNetUnfolderBase]: For 41486/41625 co-relation queries the response was YES. [2023-08-26 15:21:03,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123202 conditions, 38725 events. 27052/38725 cut-off events. For 41486/41625 co-relation queries the response was YES. Maximal size of possible extension queue 1840. Compared 248635 event pairs, 8121 based on Foata normal form. 306/36349 useless extension candidates. Maximal degree in co-relation 123186. Up to 15691 conditions per place. [2023-08-26 15:21:03,182 INFO L140 encePairwiseOnDemand]: 334/351 looper letters, 83 selfloop transitions, 20 changer transitions 0/107 dead transitions. [2023-08-26 15:21:03,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 107 transitions, 826 flow [2023-08-26 15:21:03,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:21:03,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:21:03,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 524 transitions. [2023-08-26 15:21:03,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3732193732193732 [2023-08-26 15:21:03,184 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 524 transitions. [2023-08-26 15:21:03,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 524 transitions. [2023-08-26 15:21:03,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:21:03,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 524 transitions. [2023-08-26 15:21:03,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 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 15:21:03,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 351.0) internal successors, (1755), 5 states have internal predecessors, (1755), 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 15:21:03,187 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 351.0) internal successors, (1755), 5 states have internal predecessors, (1755), 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 15:21:03,187 INFO L175 Difference]: Start difference. First operand has 76 places, 76 transitions, 455 flow. Second operand 4 states and 524 transitions. [2023-08-26 15:21:03,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 107 transitions, 826 flow [2023-08-26 15:21:03,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 107 transitions, 802 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:21:03,345 INFO L231 Difference]: Finished difference. Result has 79 places, 83 transitions, 591 flow [2023-08-26 15:21:03,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=591, PETRI_PLACES=79, PETRI_TRANSITIONS=83} [2023-08-26 15:21:03,345 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -17 predicate places. [2023-08-26 15:21:03,345 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 83 transitions, 591 flow [2023-08-26 15:21:03,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 117.2) internal successors, (586), 5 states have internal predecessors, (586), 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 15:21:03,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:21:03,346 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 15:21:03,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 15:21:03,346 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 15:21:03,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:21:03,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1867996914, now seen corresponding path program 1 times [2023-08-26 15:21:03,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:21:03,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126646110] [2023-08-26 15:21:03,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:21:03,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:21:03,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:21:03,482 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 15:21:03,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:21:03,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126646110] [2023-08-26 15:21:03,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126646110] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:21:03,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:21:03,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:21:03,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471032545] [2023-08-26 15:21:03,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:21:03,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:21:03,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:21:03,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:21:03,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 15:21:03,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 351 [2023-08-26 15:21:03,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 83 transitions, 591 flow. Second operand has 4 states, 4 states have (on average 144.25) internal successors, (577), 4 states have internal predecessors, (577), 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 15:21:03,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:21:03,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 351 [2023-08-26 15:21:03,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:21:10,053 INFO L124 PetriNetUnfolderBase]: 45758/65740 cut-off events. [2023-08-26 15:21:10,053 INFO L125 PetriNetUnfolderBase]: For 148901/151163 co-relation queries the response was YES. [2023-08-26 15:21:10,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231030 conditions, 65740 events. 45758/65740 cut-off events. For 148901/151163 co-relation queries the response was YES. Maximal size of possible extension queue 3383. Compared 486916 event pairs, 4813 based on Foata normal form. 1047/63946 useless extension candidates. Maximal degree in co-relation 231013. Up to 26551 conditions per place. [2023-08-26 15:21:10,571 INFO L140 encePairwiseOnDemand]: 346/351 looper letters, 208 selfloop transitions, 10 changer transitions 0/222 dead transitions. [2023-08-26 15:21:10,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 222 transitions, 1930 flow [2023-08-26 15:21:10,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 15:21:10,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 15:21:10,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 818 transitions. [2023-08-26 15:21:10,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46609686609686607 [2023-08-26 15:21:10,574 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 818 transitions. [2023-08-26 15:21:10,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 818 transitions. [2023-08-26 15:21:10,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:21:10,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 818 transitions. [2023-08-26 15:21:10,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 163.6) internal successors, (818), 5 states have internal predecessors, (818), 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 15:21:10,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 351.0) internal successors, (2106), 6 states have internal predecessors, (2106), 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 15:21:10,578 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 351.0) internal successors, (2106), 6 states have internal predecessors, (2106), 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 15:21:10,578 INFO L175 Difference]: Start difference. First operand has 79 places, 83 transitions, 591 flow. Second operand 5 states and 818 transitions. [2023-08-26 15:21:10,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 222 transitions, 1930 flow [2023-08-26 15:21:11,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 222 transitions, 1921 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:21:11,136 INFO L231 Difference]: Finished difference. Result has 84 places, 84 transitions, 626 flow [2023-08-26 15:21:11,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=626, PETRI_PLACES=84, PETRI_TRANSITIONS=84} [2023-08-26 15:21:11,137 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -12 predicate places. [2023-08-26 15:21:11,137 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 84 transitions, 626 flow [2023-08-26 15:21:11,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 144.25) internal successors, (577), 4 states have internal predecessors, (577), 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 15:21:11,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:21:11,138 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 15:21:11,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 15:21:11,138 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 15:21:11,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:21:11,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1533044275, now seen corresponding path program 1 times [2023-08-26 15:21:11,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:21:11,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443394746] [2023-08-26 15:21:11,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:21:11,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:21:11,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:21:12,909 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 15:21:12,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:21:12,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443394746] [2023-08-26 15:21:12,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443394746] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:21:12,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:21:12,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-26 15:21:12,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054386225] [2023-08-26 15:21:12,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:21:12,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-26 15:21:12,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:21:12,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-26 15:21:12,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-08-26 15:21:12,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 351 [2023-08-26 15:21:12,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 84 transitions, 626 flow. Second operand has 11 states, 11 states have (on average 100.54545454545455) internal successors, (1106), 11 states have internal predecessors, (1106), 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 15:21:12,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:21:12,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 351 [2023-08-26 15:21:12,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:21:19,979 INFO L124 PetriNetUnfolderBase]: 51493/72928 cut-off events. [2023-08-26 15:21:19,979 INFO L125 PetriNetUnfolderBase]: For 155554/155554 co-relation queries the response was YES. [2023-08-26 15:21:20,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270313 conditions, 72928 events. 51493/72928 cut-off events. For 155554/155554 co-relation queries the response was YES. Maximal size of possible extension queue 3244. Compared 494650 event pairs, 19526 based on Foata normal form. 17/71001 useless extension candidates. Maximal degree in co-relation 270293. Up to 69433 conditions per place. [2023-08-26 15:21:20,559 INFO L140 encePairwiseOnDemand]: 331/351 looper letters, 161 selfloop transitions, 91 changer transitions 0/252 dead transitions. [2023-08-26 15:21:20,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 252 transitions, 2408 flow [2023-08-26 15:21:20,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 15:21:20,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 15:21:20,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1229 transitions. [2023-08-26 15:21:20,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3183113183113183 [2023-08-26 15:21:20,563 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1229 transitions. [2023-08-26 15:21:20,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1229 transitions. [2023-08-26 15:21:20,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:21:20,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1229 transitions. [2023-08-26 15:21:20,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 111.72727272727273) internal successors, (1229), 11 states have internal predecessors, (1229), 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 15:21:20,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 351.0) internal successors, (4212), 12 states have internal predecessors, (4212), 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 15:21:20,570 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 351.0) internal successors, (4212), 12 states have internal predecessors, (4212), 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 15:21:20,570 INFO L175 Difference]: Start difference. First operand has 84 places, 84 transitions, 626 flow. Second operand 11 states and 1229 transitions. [2023-08-26 15:21:20,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 252 transitions, 2408 flow [2023-08-26 15:21:21,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 252 transitions, 2374 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-26 15:21:21,480 INFO L231 Difference]: Finished difference. Result has 102 places, 173 transitions, 1721 flow [2023-08-26 15:21:21,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1721, PETRI_PLACES=102, PETRI_TRANSITIONS=173} [2023-08-26 15:21:21,480 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, 6 predicate places. [2023-08-26 15:21:21,480 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 173 transitions, 1721 flow [2023-08-26 15:21:21,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 100.54545454545455) internal successors, (1106), 11 states have internal predecessors, (1106), 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 15:21:21,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:21:21,481 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 15:21:21,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 15:21:21,481 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 15:21:21,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:21:21,481 INFO L85 PathProgramCache]: Analyzing trace with hash 625906293, now seen corresponding path program 2 times [2023-08-26 15:21:21,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:21:21,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573962513] [2023-08-26 15:21:21,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:21:21,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:21:21,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:21:22,979 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 15:21:22,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:21:22,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573962513] [2023-08-26 15:21:22,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573962513] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:21:22,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:21:22,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 15:21:22,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331722334] [2023-08-26 15:21:22,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:21:22,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 15:21:22,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:21:22,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 15:21:22,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-26 15:21:22,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 351 [2023-08-26 15:21:22,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 173 transitions, 1721 flow. Second operand has 9 states, 9 states have (on average 102.88888888888889) internal successors, (926), 9 states have internal predecessors, (926), 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 15:21:22,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:21:22,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 351 [2023-08-26 15:21:22,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:21:30,827 INFO L124 PetriNetUnfolderBase]: 48280/68637 cut-off events. [2023-08-26 15:21:30,827 INFO L125 PetriNetUnfolderBase]: For 166413/167156 co-relation queries the response was YES. [2023-08-26 15:21:31,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272306 conditions, 68637 events. 48280/68637 cut-off events. For 166413/167156 co-relation queries the response was YES. Maximal size of possible extension queue 3490. Compared 478659 event pairs, 28204 based on Foata normal form. 118/66788 useless extension candidates. Maximal degree in co-relation 272276. Up to 65348 conditions per place. [2023-08-26 15:21:31,501 INFO L140 encePairwiseOnDemand]: 340/351 looper letters, 213 selfloop transitions, 45 changer transitions 0/275 dead transitions. [2023-08-26 15:21:31,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 275 transitions, 3038 flow [2023-08-26 15:21:31,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 15:21:31,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 15:21:31,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 996 transitions. [2023-08-26 15:21:31,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.315289648622982 [2023-08-26 15:21:31,505 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 996 transitions. [2023-08-26 15:21:31,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 996 transitions. [2023-08-26 15:21:31,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:21:31,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 996 transitions. [2023-08-26 15:21:31,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 110.66666666666667) internal successors, (996), 9 states have internal predecessors, (996), 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 15:21:31,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 351.0) internal successors, (3510), 10 states have internal predecessors, (3510), 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 15:21:31,511 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 351.0) internal successors, (3510), 10 states have internal predecessors, (3510), 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 15:21:31,511 INFO L175 Difference]: Start difference. First operand has 102 places, 173 transitions, 1721 flow. Second operand 9 states and 996 transitions. [2023-08-26 15:21:31,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 275 transitions, 3038 flow [2023-08-26 15:21:33,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 275 transitions, 3028 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-08-26 15:21:33,282 INFO L231 Difference]: Finished difference. Result has 116 places, 212 transitions, 2288 flow [2023-08-26 15:21:33,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=1711, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2288, PETRI_PLACES=116, PETRI_TRANSITIONS=212} [2023-08-26 15:21:33,282 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, 20 predicate places. [2023-08-26 15:21:33,283 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 212 transitions, 2288 flow [2023-08-26 15:21:33,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 102.88888888888889) internal successors, (926), 9 states have internal predecessors, (926), 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 15:21:33,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:21:33,283 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 15:21:33,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 15:21:33,283 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 15:21:33,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:21:33,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1153448045, now seen corresponding path program 3 times [2023-08-26 15:21:33,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:21:33,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680373640] [2023-08-26 15:21:33,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:21:33,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:21:33,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:21:34,386 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 15:21:34,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:21:34,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680373640] [2023-08-26 15:21:34,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680373640] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:21:34,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:21:34,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 15:21:34,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345248756] [2023-08-26 15:21:34,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:21:34,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 15:21:34,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:21:34,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 15:21:34,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-08-26 15:21:34,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 351 [2023-08-26 15:21:34,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 212 transitions, 2288 flow. Second operand has 10 states, 10 states have (on average 105.7) internal successors, (1057), 10 states have internal predecessors, (1057), 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 15:21:34,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:21:34,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 351 [2023-08-26 15:21:34,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:21:42,878 INFO L124 PetriNetUnfolderBase]: 47925/68358 cut-off events. [2023-08-26 15:21:42,879 INFO L125 PetriNetUnfolderBase]: For 198965/199344 co-relation queries the response was YES. [2023-08-26 15:21:43,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283057 conditions, 68358 events. 47925/68358 cut-off events. For 198965/199344 co-relation queries the response was YES. Maximal size of possible extension queue 3368. Compared 480698 event pairs, 12261 based on Foata normal form. 234/66690 useless extension candidates. Maximal degree in co-relation 283020. Up to 58563 conditions per place. [2023-08-26 15:21:43,662 INFO L140 encePairwiseOnDemand]: 337/351 looper letters, 189 selfloop transitions, 154 changer transitions 0/360 dead transitions. [2023-08-26 15:21:43,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 360 transitions, 4232 flow [2023-08-26 15:21:43,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-26 15:21:43,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-26 15:21:43,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1478 transitions. [2023-08-26 15:21:43,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32390970852509315 [2023-08-26 15:21:43,666 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1478 transitions. [2023-08-26 15:21:43,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1478 transitions. [2023-08-26 15:21:43,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:21:43,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1478 transitions. [2023-08-26 15:21:43,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 113.6923076923077) internal successors, (1478), 13 states have internal predecessors, (1478), 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 15:21:43,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 351.0) internal successors, (4914), 14 states have internal predecessors, (4914), 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 15:21:43,676 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 351.0) internal successors, (4914), 14 states have internal predecessors, (4914), 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 15:21:43,676 INFO L175 Difference]: Start difference. First operand has 116 places, 212 transitions, 2288 flow. Second operand 13 states and 1478 transitions. [2023-08-26 15:21:43,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 360 transitions, 4232 flow [2023-08-26 15:21:45,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 360 transitions, 4177 flow, removed 25 selfloop flow, removed 1 redundant places. [2023-08-26 15:21:45,675 INFO L231 Difference]: Finished difference. Result has 135 places, 258 transitions, 3267 flow [2023-08-26 15:21:45,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=2233, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3267, PETRI_PLACES=135, PETRI_TRANSITIONS=258} [2023-08-26 15:21:45,675 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, 39 predicate places. [2023-08-26 15:21:45,676 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 258 transitions, 3267 flow [2023-08-26 15:21:45,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 105.7) internal successors, (1057), 10 states have internal predecessors, (1057), 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 15:21:45,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:21:45,677 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 15:21:45,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 15:21:45,677 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 15:21:45,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:21:45,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1791901379, now seen corresponding path program 1 times [2023-08-26 15:21:45,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:21:45,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496406924] [2023-08-26 15:21:45,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:21:45,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:21:45,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:21:45,860 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 15:21:45,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:21:45,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496406924] [2023-08-26 15:21:45,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496406924] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:21:45,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:21:45,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 15:21:45,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411200337] [2023-08-26 15:21:45,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:21:45,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 15:21:45,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:21:45,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 15:21:45,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-26 15:21:45,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 351 [2023-08-26 15:21:45,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 258 transitions, 3267 flow. Second operand has 7 states, 7 states have (on average 114.42857142857143) internal successors, (801), 7 states have internal predecessors, (801), 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 15:21:45,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:21:45,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 351 [2023-08-26 15:21:45,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:21:53,953 INFO L124 PetriNetUnfolderBase]: 40531/58179 cut-off events. [2023-08-26 15:21:53,953 INFO L125 PetriNetUnfolderBase]: For 230763/231049 co-relation queries the response was YES. [2023-08-26 15:21:54,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262075 conditions, 58179 events. 40531/58179 cut-off events. For 230763/231049 co-relation queries the response was YES. Maximal size of possible extension queue 2649. Compared 397621 event pairs, 10669 based on Foata normal form. 887/57775 useless extension candidates. Maximal degree in co-relation 262030. Up to 19465 conditions per place. [2023-08-26 15:21:54,671 INFO L140 encePairwiseOnDemand]: 333/351 looper letters, 244 selfloop transitions, 80 changer transitions 0/341 dead transitions. [2023-08-26 15:21:54,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 341 transitions, 4779 flow [2023-08-26 15:21:54,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 15:21:54,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 15:21:54,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 752 transitions. [2023-08-26 15:21:54,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3570750237416904 [2023-08-26 15:21:54,674 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 752 transitions. [2023-08-26 15:21:54,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 752 transitions. [2023-08-26 15:21:54,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:21:54,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 752 transitions. [2023-08-26 15:21:54,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 125.33333333333333) internal successors, (752), 6 states have internal predecessors, (752), 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 15:21:54,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 351.0) internal successors, (2457), 7 states have internal predecessors, (2457), 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 15:21:54,678 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 351.0) internal successors, (2457), 7 states have internal predecessors, (2457), 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 15:21:54,678 INFO L175 Difference]: Start difference. First operand has 135 places, 258 transitions, 3267 flow. Second operand 6 states and 752 transitions. [2023-08-26 15:21:54,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 341 transitions, 4779 flow [2023-08-26 15:21:58,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 341 transitions, 4618 flow, removed 74 selfloop flow, removed 2 redundant places. [2023-08-26 15:21:58,147 INFO L231 Difference]: Finished difference. Result has 140 places, 282 transitions, 3879 flow [2023-08-26 15:21:58,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=3118, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3879, PETRI_PLACES=140, PETRI_TRANSITIONS=282} [2023-08-26 15:21:58,148 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, 44 predicate places. [2023-08-26 15:21:58,148 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 282 transitions, 3879 flow [2023-08-26 15:21:58,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 114.42857142857143) internal successors, (801), 7 states have internal predecessors, (801), 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 15:21:58,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:21:58,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:21:58,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 15:21:58,149 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 15:21:58,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:21:58,149 INFO L85 PathProgramCache]: Analyzing trace with hash -195142135, now seen corresponding path program 1 times [2023-08-26 15:21:58,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:21:58,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299391503] [2023-08-26 15:21:58,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:21:58,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:21:58,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:21:58,763 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 15:21:58,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:21:58,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299391503] [2023-08-26 15:21:58,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299391503] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:21:58,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:21:58,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 15:21:58,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196286779] [2023-08-26 15:21:58,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:21:58,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 15:21:58,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:21:58,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 15:21:58,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-26 15:21:58,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 351 [2023-08-26 15:21:58,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 282 transitions, 3879 flow. Second operand has 6 states, 6 states have (on average 130.0) internal successors, (780), 6 states have internal predecessors, (780), 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 15:21:58,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:21:58,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 351 [2023-08-26 15:21:58,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:22:12,396 INFO L124 PetriNetUnfolderBase]: 65167/93834 cut-off events. [2023-08-26 15:22:12,397 INFO L125 PetriNetUnfolderBase]: For 407230/407490 co-relation queries the response was YES. [2023-08-26 15:22:13,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 428853 conditions, 93834 events. 65167/93834 cut-off events. For 407230/407490 co-relation queries the response was YES. Maximal size of possible extension queue 4584. Compared 696641 event pairs, 18346 based on Foata normal form. 225/91343 useless extension candidates. Maximal degree in co-relation 428806. Up to 49315 conditions per place. [2023-08-26 15:22:13,937 INFO L140 encePairwiseOnDemand]: 342/351 looper letters, 332 selfloop transitions, 102 changer transitions 0/451 dead transitions. [2023-08-26 15:22:13,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 451 transitions, 6530 flow [2023-08-26 15:22:13,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 15:22:13,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 15:22:13,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 877 transitions. [2023-08-26 15:22:13,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4164292497625831 [2023-08-26 15:22:13,939 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 877 transitions. [2023-08-26 15:22:13,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 877 transitions. [2023-08-26 15:22:13,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:22:13,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 877 transitions. [2023-08-26 15:22:13,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 146.16666666666666) internal successors, (877), 6 states have internal predecessors, (877), 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 15:22:13,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 351.0) internal successors, (2457), 7 states have internal predecessors, (2457), 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 15:22:13,943 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 351.0) internal successors, (2457), 7 states have internal predecessors, (2457), 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 15:22:13,943 INFO L175 Difference]: Start difference. First operand has 140 places, 282 transitions, 3879 flow. Second operand 6 states and 877 transitions. [2023-08-26 15:22:13,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 451 transitions, 6530 flow [2023-08-26 15:22:21,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 451 transitions, 6472 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-26 15:22:21,133 INFO L231 Difference]: Finished difference. Result has 145 places, 324 transitions, 4840 flow [2023-08-26 15:22:21,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=3842, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4840, PETRI_PLACES=145, PETRI_TRANSITIONS=324} [2023-08-26 15:22:21,134 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, 49 predicate places. [2023-08-26 15:22:21,134 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 324 transitions, 4840 flow [2023-08-26 15:22:21,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 130.0) internal successors, (780), 6 states have internal predecessors, (780), 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 15:22:21,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:22:21,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:22:21,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 15:22:21,134 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 15:22:21,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:22:21,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1618689217, now seen corresponding path program 1 times [2023-08-26 15:22:21,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:22:21,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892155604] [2023-08-26 15:22:21,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:22:21,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:22:21,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:22:21,329 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 15:22:21,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:22:21,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892155604] [2023-08-26 15:22:21,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892155604] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:22:21,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:22:21,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:22:21,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515168645] [2023-08-26 15:22:21,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:22:21,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:22:21,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:22:21,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:22:21,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:22:21,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 351 [2023-08-26 15:22:21,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 324 transitions, 4840 flow. Second operand has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:21,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:22:21,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 351 [2023-08-26 15:22:21,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:22:30,701 INFO L124 PetriNetUnfolderBase]: 38043/57773 cut-off events. [2023-08-26 15:22:30,701 INFO L125 PetriNetUnfolderBase]: For 301730/303654 co-relation queries the response was YES. [2023-08-26 15:22:31,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283485 conditions, 57773 events. 38043/57773 cut-off events. For 301730/303654 co-relation queries the response was YES. Maximal size of possible extension queue 3207. Compared 447696 event pairs, 11398 based on Foata normal form. 709/56449 useless extension candidates. Maximal degree in co-relation 283434. Up to 54387 conditions per place. [2023-08-26 15:22:31,714 INFO L140 encePairwiseOnDemand]: 345/351 looper letters, 239 selfloop transitions, 5 changer transitions 0/318 dead transitions. [2023-08-26 15:22:31,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 318 transitions, 4685 flow [2023-08-26 15:22:31,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:22:31,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:22:31,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 472 transitions. [2023-08-26 15:22:31,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4482431149097816 [2023-08-26 15:22:31,716 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 472 transitions. [2023-08-26 15:22:31,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 472 transitions. [2023-08-26 15:22:31,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:22:31,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 472 transitions. [2023-08-26 15:22:31,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 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 15:22:31,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 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 15:22:31,719 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 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 15:22:31,719 INFO L175 Difference]: Start difference. First operand has 145 places, 324 transitions, 4840 flow. Second operand 3 states and 472 transitions. [2023-08-26 15:22:31,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 318 transitions, 4685 flow