/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread-wmm/safe018_pso.oepc_pso.opt_tso.oepc_tso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 18:25:04,751 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 18:25:04,834 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 18:25:04,839 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 18:25:04,840 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 18:25:04,867 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 18:25:04,868 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 18:25:04,873 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 18:25:04,873 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 18:25:04,873 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 18:25:04,874 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 18:25:04,874 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 18:25:04,875 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 18:25:04,875 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 18:25:04,875 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 18:25:04,875 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 18:25:04,876 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 18:25:04,876 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 18:25:04,877 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 18:25:04,877 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 18:25:04,877 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 18:25:04,881 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 18:25:04,881 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 18:25:04,882 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 18:25:04,884 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 18:25:04,884 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 18:25:04,884 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 18:25:04,885 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:25:04,885 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 18:25:04,885 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 18:25:04,886 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 18:25:04,886 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 18:25:04,886 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 18:25:04,886 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 18:25:04,887 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 18:25:04,887 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 18:25:05,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 18:25:05,230 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 18:25:05,232 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 18:25:05,233 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 18:25:05,233 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 18:25:05,234 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe018_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2023-08-26 18:25:06,444 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 18:25:06,657 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 18:25:06,657 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe018_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2023-08-26 18:25:06,676 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ae2c020c/0dfcf2ac56aa4fefa73bfbae52a46184/FLAGcc73c117a [2023-08-26 18:25:06,689 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ae2c020c/0dfcf2ac56aa4fefa73bfbae52a46184 [2023-08-26 18:25:06,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 18:25:06,693 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 18:25:06,696 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 18:25:06,696 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 18:25:06,699 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 18:25:06,700 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:25:06" (1/1) ... [2023-08-26 18:25:06,701 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b15b35d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:25:06, skipping insertion in model container [2023-08-26 18:25:06,701 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:25:06" (1/1) ... [2023-08-26 18:25:06,761 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 18:25:07,084 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:25:07,096 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 18:25:07,126 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 18:25:07,128 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 18:25:07,160 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:25:07,201 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 18:25:07,201 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 18:25:07,207 INFO L206 MainTranslator]: Completed translation [2023-08-26 18:25:07,208 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:25:07 WrapperNode [2023-08-26 18:25:07,208 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 18:25:07,209 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 18:25:07,209 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 18:25:07,209 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 18:25:07,216 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:25:07" (1/1) ... [2023-08-26 18:25:07,244 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:25:07" (1/1) ... [2023-08-26 18:25:07,266 INFO L138 Inliner]: procedures = 176, calls = 52, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2023-08-26 18:25:07,266 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 18:25:07,268 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 18:25:07,268 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 18:25:07,268 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 18:25:07,275 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:25:07" (1/1) ... [2023-08-26 18:25:07,275 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:25:07" (1/1) ... [2023-08-26 18:25:07,287 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:25:07" (1/1) ... [2023-08-26 18:25:07,287 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:25:07" (1/1) ... [2023-08-26 18:25:07,296 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:25:07" (1/1) ... [2023-08-26 18:25:07,298 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:25:07" (1/1) ... [2023-08-26 18:25:07,299 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:25:07" (1/1) ... [2023-08-26 18:25:07,300 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:25:07" (1/1) ... [2023-08-26 18:25:07,302 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 18:25:07,302 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 18:25:07,303 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 18:25:07,303 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 18:25:07,303 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:25:07" (1/1) ... [2023-08-26 18:25:07,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:25:07,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:25:07,338 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-26 18:25:07,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 18:25:07,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 18:25:07,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 18:25:07,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 18:25:07,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 18:25:07,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 18:25:07,381 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-26 18:25:07,382 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-26 18:25:07,382 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-26 18:25:07,382 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-26 18:25:07,382 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-26 18:25:07,382 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-26 18:25:07,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 18:25:07,382 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 18:25:07,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 18:25:07,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 18:25:07,384 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 18:25:07,495 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 18:25:07,496 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 18:25:07,638 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 18:25:07,645 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 18:25:07,645 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 18:25:07,647 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:25:07 BoogieIcfgContainer [2023-08-26 18:25:07,647 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 18:25:07,649 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 18:25:07,650 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 18:25:07,652 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 18:25:07,653 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 06:25:06" (1/3) ... [2023-08-26 18:25:07,653 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@216514b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:25:07, skipping insertion in model container [2023-08-26 18:25:07,653 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:25:07" (2/3) ... [2023-08-26 18:25:07,654 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@216514b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:25:07, skipping insertion in model container [2023-08-26 18:25:07,654 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:25:07" (3/3) ... [2023-08-26 18:25:07,655 INFO L112 eAbstractionObserver]: Analyzing ICFG safe018_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2023-08-26 18:25:07,671 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 18:25:07,671 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2023-08-26 18:25:07,672 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 18:25:07,722 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 18:25:07,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 94 transitions, 203 flow [2023-08-26 18:25:07,786 INFO L124 PetriNetUnfolderBase]: 3/91 cut-off events. [2023-08-26 18:25:07,786 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:25:07,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 91 events. 3/91 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 71. Up to 2 conditions per place. [2023-08-26 18:25:07,791 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 94 transitions, 203 flow [2023-08-26 18:25:07,795 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 77 transitions, 163 flow [2023-08-26 18:25:07,798 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:25:07,807 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 77 transitions, 163 flow [2023-08-26 18:25:07,809 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 77 transitions, 163 flow [2023-08-26 18:25:07,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 77 transitions, 163 flow [2023-08-26 18:25:07,829 INFO L124 PetriNetUnfolderBase]: 1/77 cut-off events. [2023-08-26 18:25:07,829 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:25:07,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 77 events. 1/77 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 55 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 57. Up to 2 conditions per place. [2023-08-26 18:25:07,831 INFO L119 LiptonReduction]: Number of co-enabled transitions 1110 [2023-08-26 18:25:10,311 INFO L134 LiptonReduction]: Checked pairs total: 1919 [2023-08-26 18:25:10,311 INFO L136 LiptonReduction]: Total number of compositions: 78 [2023-08-26 18:25:10,329 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:25:10,334 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;@b11c33f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:25:10,334 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-26 18:25:10,335 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:25:10,335 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 18:25:10,335 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:25:10,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:25:10,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 18:25:10,336 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:25:10,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:25:10,340 INFO L85 PathProgramCache]: Analyzing trace with hash 329, now seen corresponding path program 1 times [2023-08-26 18:25:10,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:25:10,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741917455] [2023-08-26 18:25:10,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:25:10,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:25:10,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:25:10,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:25:10,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:25:10,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741917455] [2023-08-26 18:25:10,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741917455] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:25:10,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:25:10,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 18:25:10,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634680150] [2023-08-26 18:25:10,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:25:10,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 18:25:10,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:25:10,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 18:25:10,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 18:25:10,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 172 [2023-08-26 18:25:10,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 22 transitions, 53 flow. Second operand has 2 states, 2 states have (on average 87.5) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:10,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:25:10,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 172 [2023-08-26 18:25:10,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:25:10,543 INFO L124 PetriNetUnfolderBase]: 164/290 cut-off events. [2023-08-26 18:25:10,544 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-26 18:25:10,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 591 conditions, 290 events. 164/290 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1111 event pairs, 164 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 580. Up to 271 conditions per place. [2023-08-26 18:25:10,548 INFO L140 encePairwiseOnDemand]: 166/172 looper letters, 14 selfloop transitions, 0 changer transitions 0/16 dead transitions. [2023-08-26 18:25:10,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 16 transitions, 69 flow [2023-08-26 18:25:10,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 18:25:10,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 18:25:10,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 194 transitions. [2023-08-26 18:25:10,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.563953488372093 [2023-08-26 18:25:10,566 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 194 transitions. [2023-08-26 18:25:10,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 194 transitions. [2023-08-26 18:25:10,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:25:10,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 194 transitions. [2023-08-26 18:25:10,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 97.0) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:10,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:10,581 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:10,582 INFO L175 Difference]: Start difference. First operand has 32 places, 22 transitions, 53 flow. Second operand 2 states and 194 transitions. [2023-08-26 18:25:10,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 16 transitions, 69 flow [2023-08-26 18:25:10,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 18:25:10,587 INFO L231 Difference]: Finished difference. Result has 24 places, 16 transitions, 38 flow [2023-08-26 18:25:10,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=38, PETRI_PLACES=24, PETRI_TRANSITIONS=16} [2023-08-26 18:25:10,591 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -8 predicate places. [2023-08-26 18:25:10,591 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 16 transitions, 38 flow [2023-08-26 18:25:10,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 87.5) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:10,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:25:10,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:25:10,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 18:25:10,592 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:25:10,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:25:10,592 INFO L85 PathProgramCache]: Analyzing trace with hash 190514944, now seen corresponding path program 1 times [2023-08-26 18:25:10,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:25:10,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887032137] [2023-08-26 18:25:10,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:25:10,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:25:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:25:10,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:25:10,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:25:10,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887032137] [2023-08-26 18:25:10,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887032137] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:25:10,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:25:10,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:25:10,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347916005] [2023-08-26 18:25:10,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:25:10,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:25:10,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:25:10,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:25:10,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:25:10,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 172 [2023-08-26 18:25:10,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 16 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:10,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:25:10,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 172 [2023-08-26 18:25:10,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:25:11,013 INFO L124 PetriNetUnfolderBase]: 222/384 cut-off events. [2023-08-26 18:25:11,013 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:25:11,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 781 conditions, 384 events. 222/384 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1506 event pairs, 69 based on Foata normal form. 3/387 useless extension candidates. Maximal degree in co-relation 778. Up to 340 conditions per place. [2023-08-26 18:25:11,017 INFO L140 encePairwiseOnDemand]: 168/172 looper letters, 21 selfloop transitions, 3 changer transitions 0/25 dead transitions. [2023-08-26 18:25:11,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 25 transitions, 108 flow [2023-08-26 18:25:11,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:25:11,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:25:11,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 265 transitions. [2023-08-26 18:25:11,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5135658914728682 [2023-08-26 18:25:11,019 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 265 transitions. [2023-08-26 18:25:11,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 265 transitions. [2023-08-26 18:25:11,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:25:11,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 265 transitions. [2023-08-26 18:25:11,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:11,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:11,023 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:11,023 INFO L175 Difference]: Start difference. First operand has 24 places, 16 transitions, 38 flow. Second operand 3 states and 265 transitions. [2023-08-26 18:25:11,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 25 transitions, 108 flow [2023-08-26 18:25:11,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 25 transitions, 108 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:25:11,024 INFO L231 Difference]: Finished difference. Result has 27 places, 18 transitions, 57 flow [2023-08-26 18:25:11,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=27, PETRI_TRANSITIONS=18} [2023-08-26 18:25:11,025 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -5 predicate places. [2023-08-26 18:25:11,025 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 18 transitions, 57 flow [2023-08-26 18:25:11,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:11,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:25:11,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:25:11,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 18:25:11,026 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:25:11,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:25:11,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1610995023, now seen corresponding path program 1 times [2023-08-26 18:25:11,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:25:11,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632949672] [2023-08-26 18:25:11,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:25:11,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:25:11,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:25:11,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:25:11,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:25:11,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632949672] [2023-08-26 18:25:11,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632949672] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:25:11,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:25:11,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:25:11,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821608918] [2023-08-26 18:25:11,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:25:11,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:25:11,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:25:11,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:25:11,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:25:11,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 172 [2023-08-26 18:25:11,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 18 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:11,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:25:11,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 172 [2023-08-26 18:25:11,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:25:11,212 INFO L124 PetriNetUnfolderBase]: 201/354 cut-off events. [2023-08-26 18:25:11,212 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2023-08-26 18:25:11,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 824 conditions, 354 events. 201/354 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1300 event pairs, 75 based on Foata normal form. 9/363 useless extension candidates. Maximal degree in co-relation 819. Up to 211 conditions per place. [2023-08-26 18:25:11,215 INFO L140 encePairwiseOnDemand]: 169/172 looper letters, 19 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2023-08-26 18:25:11,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 23 transitions, 111 flow [2023-08-26 18:25:11,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:25:11,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:25:11,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 262 transitions. [2023-08-26 18:25:11,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5077519379844961 [2023-08-26 18:25:11,217 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 262 transitions. [2023-08-26 18:25:11,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 262 transitions. [2023-08-26 18:25:11,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:25:11,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 262 transitions. [2023-08-26 18:25:11,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:11,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:11,220 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:11,220 INFO L175 Difference]: Start difference. First operand has 27 places, 18 transitions, 57 flow. Second operand 3 states and 262 transitions. [2023-08-26 18:25:11,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 23 transitions, 111 flow [2023-08-26 18:25:11,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 23 transitions, 108 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:25:11,221 INFO L231 Difference]: Finished difference. Result has 29 places, 18 transitions, 65 flow [2023-08-26 18:25:11,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=29, PETRI_TRANSITIONS=18} [2023-08-26 18:25:11,222 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -3 predicate places. [2023-08-26 18:25:11,222 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 18 transitions, 65 flow [2023-08-26 18:25:11,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:11,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:25:11,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:25:11,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 18:25:11,223 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:25:11,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:25:11,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1610994930, now seen corresponding path program 1 times [2023-08-26 18:25:11,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:25:11,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97307115] [2023-08-26 18:25:11,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:25:11,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:25:11,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:25:11,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:25:11,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:25:11,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97307115] [2023-08-26 18:25:11,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97307115] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:25:11,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:25:11,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:25:11,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788621159] [2023-08-26 18:25:11,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:25:11,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:25:11,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:25:11,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:25:11,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:25:11,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 172 [2023-08-26 18:25:11,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 18 transitions, 65 flow. Second operand has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:11,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:25:11,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 172 [2023-08-26 18:25:11,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:25:11,402 INFO L124 PetriNetUnfolderBase]: 188/335 cut-off events. [2023-08-26 18:25:11,402 INFO L125 PetriNetUnfolderBase]: For 109/109 co-relation queries the response was YES. [2023-08-26 18:25:11,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 822 conditions, 335 events. 188/335 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1284 event pairs, 65 based on Foata normal form. 6/341 useless extension candidates. Maximal degree in co-relation 816. Up to 265 conditions per place. [2023-08-26 18:25:11,405 INFO L140 encePairwiseOnDemand]: 169/172 looper letters, 22 selfloop transitions, 3 changer transitions 0/26 dead transitions. [2023-08-26 18:25:11,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 26 transitions, 135 flow [2023-08-26 18:25:11,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:25:11,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:25:11,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 265 transitions. [2023-08-26 18:25:11,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5135658914728682 [2023-08-26 18:25:11,407 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 265 transitions. [2023-08-26 18:25:11,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 265 transitions. [2023-08-26 18:25:11,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:25:11,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 265 transitions. [2023-08-26 18:25:11,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:11,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:11,410 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:11,410 INFO L175 Difference]: Start difference. First operand has 29 places, 18 transitions, 65 flow. Second operand 3 states and 265 transitions. [2023-08-26 18:25:11,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 26 transitions, 135 flow [2023-08-26 18:25:11,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 26 transitions, 129 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:25:11,412 INFO L231 Difference]: Finished difference. Result has 30 places, 18 transitions, 70 flow [2023-08-26 18:25:11,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=30, PETRI_TRANSITIONS=18} [2023-08-26 18:25:11,412 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -2 predicate places. [2023-08-26 18:25:11,413 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 18 transitions, 70 flow [2023-08-26 18:25:11,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:11,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:25:11,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:25:11,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 18:25:11,413 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:25:11,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:25:11,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1598762877, now seen corresponding path program 1 times [2023-08-26 18:25:11,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:25:11,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710743239] [2023-08-26 18:25:11,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:25:11,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:25:11,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:25:11,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:25:11,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:25:11,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710743239] [2023-08-26 18:25:11,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710743239] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:25:11,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:25:11,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:25:11,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909350696] [2023-08-26 18:25:11,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:25:11,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:25:11,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:25:11,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:25:11,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:25:11,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 172 [2023-08-26 18:25:11,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 18 transitions, 70 flow. Second operand has 4 states, 4 states have (on average 83.5) internal successors, (334), 4 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:11,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:25:11,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 172 [2023-08-26 18:25:11,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:25:11,635 INFO L124 PetriNetUnfolderBase]: 215/387 cut-off events. [2023-08-26 18:25:11,635 INFO L125 PetriNetUnfolderBase]: For 245/245 co-relation queries the response was YES. [2023-08-26 18:25:11,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 980 conditions, 387 events. 215/387 cut-off events. For 245/245 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1623 event pairs, 37 based on Foata normal form. 18/404 useless extension candidates. Maximal degree in co-relation 973. Up to 168 conditions per place. [2023-08-26 18:25:11,637 INFO L140 encePairwiseOnDemand]: 168/172 looper letters, 23 selfloop transitions, 4 changer transitions 6/34 dead transitions. [2023-08-26 18:25:11,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 34 transitions, 191 flow [2023-08-26 18:25:11,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:25:11,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:25:11,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 355 transitions. [2023-08-26 18:25:11,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159883720930233 [2023-08-26 18:25:11,639 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 355 transitions. [2023-08-26 18:25:11,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 355 transitions. [2023-08-26 18:25:11,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:25:11,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 355 transitions. [2023-08-26 18:25:11,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 88.75) internal successors, (355), 4 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:11,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:11,643 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:11,643 INFO L175 Difference]: Start difference. First operand has 30 places, 18 transitions, 70 flow. Second operand 4 states and 355 transitions. [2023-08-26 18:25:11,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 34 transitions, 191 flow [2023-08-26 18:25:11,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 34 transitions, 179 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:25:11,646 INFO L231 Difference]: Finished difference. Result has 33 places, 18 transitions, 81 flow [2023-08-26 18:25:11,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=81, PETRI_PLACES=33, PETRI_TRANSITIONS=18} [2023-08-26 18:25:11,649 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 1 predicate places. [2023-08-26 18:25:11,649 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 18 transitions, 81 flow [2023-08-26 18:25:11,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.5) internal successors, (334), 4 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:11,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:25:11,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:25:11,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 18:25:11,650 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:25:11,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:25:11,650 INFO L85 PathProgramCache]: Analyzing trace with hash -602992817, now seen corresponding path program 1 times [2023-08-26 18:25:11,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:25:11,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992857382] [2023-08-26 18:25:11,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:25:11,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:25:11,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:25:11,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:25:11,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:25:11,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992857382] [2023-08-26 18:25:11,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992857382] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:25:11,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:25:11,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:25:11,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077877557] [2023-08-26 18:25:11,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:25:11,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:25:11,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:25:11,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:25:11,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:25:11,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 172 [2023-08-26 18:25:11,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 18 transitions, 81 flow. Second operand has 5 states, 5 states have (on average 80.2) internal successors, (401), 5 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:11,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:25:11,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 172 [2023-08-26 18:25:11,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:25:11,876 INFO L124 PetriNetUnfolderBase]: 195/336 cut-off events. [2023-08-26 18:25:11,876 INFO L125 PetriNetUnfolderBase]: For 437/437 co-relation queries the response was YES. [2023-08-26 18:25:11,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 925 conditions, 336 events. 195/336 cut-off events. For 437/437 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1070 event pairs, 95 based on Foata normal form. 18/354 useless extension candidates. Maximal degree in co-relation 916. Up to 164 conditions per place. [2023-08-26 18:25:11,878 INFO L140 encePairwiseOnDemand]: 168/172 looper letters, 18 selfloop transitions, 3 changer transitions 7/28 dead transitions. [2023-08-26 18:25:11,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 28 transitions, 160 flow [2023-08-26 18:25:11,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:25:11,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:25:11,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 340 transitions. [2023-08-26 18:25:11,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4941860465116279 [2023-08-26 18:25:11,880 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 340 transitions. [2023-08-26 18:25:11,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 340 transitions. [2023-08-26 18:25:11,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:25:11,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 340 transitions. [2023-08-26 18:25:11,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:11,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:11,884 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:11,884 INFO L175 Difference]: Start difference. First operand has 33 places, 18 transitions, 81 flow. Second operand 4 states and 340 transitions. [2023-08-26 18:25:11,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 28 transitions, 160 flow [2023-08-26 18:25:11,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 28 transitions, 146 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-26 18:25:11,888 INFO L231 Difference]: Finished difference. Result has 34 places, 16 transitions, 70 flow [2023-08-26 18:25:11,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=70, PETRI_PLACES=34, PETRI_TRANSITIONS=16} [2023-08-26 18:25:11,890 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2023-08-26 18:25:11,892 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 16 transitions, 70 flow [2023-08-26 18:25:11,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.2) internal successors, (401), 5 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:11,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:25:11,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:25:11,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 18:25:11,895 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:25:11,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:25:11,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1828335070, now seen corresponding path program 1 times [2023-08-26 18:25:11,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:25:11,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761458208] [2023-08-26 18:25:11,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:25:11,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:25:11,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:25:12,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:25:12,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:25:12,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761458208] [2023-08-26 18:25:12,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761458208] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:25:12,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:25:12,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:25:12,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329117677] [2023-08-26 18:25:12,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:25:12,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:25:12,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:25:12,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:25:12,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:25:12,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 172 [2023-08-26 18:25:12,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 16 transitions, 70 flow. Second operand has 4 states, 4 states have (on average 82.75) internal successors, (331), 4 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:12,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:25:12,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 172 [2023-08-26 18:25:12,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:25:12,124 INFO L124 PetriNetUnfolderBase]: 51/116 cut-off events. [2023-08-26 18:25:12,124 INFO L125 PetriNetUnfolderBase]: For 226/226 co-relation queries the response was YES. [2023-08-26 18:25:12,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340 conditions, 116 events. 51/116 cut-off events. For 226/226 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 366 event pairs, 19 based on Foata normal form. 8/124 useless extension candidates. Maximal degree in co-relation 331. Up to 68 conditions per place. [2023-08-26 18:25:12,126 INFO L140 encePairwiseOnDemand]: 166/172 looper letters, 17 selfloop transitions, 4 changer transitions 12/35 dead transitions. [2023-08-26 18:25:12,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 35 transitions, 207 flow [2023-08-26 18:25:12,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 18:25:12,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 18:25:12,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 435 transitions. [2023-08-26 18:25:12,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5058139534883721 [2023-08-26 18:25:12,128 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 435 transitions. [2023-08-26 18:25:12,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 435 transitions. [2023-08-26 18:25:12,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:25:12,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 435 transitions. [2023-08-26 18:25:12,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 87.0) internal successors, (435), 5 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 18:25:12,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:12,131 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:12,131 INFO L175 Difference]: Start difference. First operand has 34 places, 16 transitions, 70 flow. Second operand 5 states and 435 transitions. [2023-08-26 18:25:12,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 35 transitions, 207 flow [2023-08-26 18:25:12,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 35 transitions, 157 flow, removed 8 selfloop flow, removed 8 redundant places. [2023-08-26 18:25:12,133 INFO L231 Difference]: Finished difference. Result has 33 places, 19 transitions, 80 flow [2023-08-26 18:25:12,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=80, PETRI_PLACES=33, PETRI_TRANSITIONS=19} [2023-08-26 18:25:12,134 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 1 predicate places. [2023-08-26 18:25:12,134 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 19 transitions, 80 flow [2023-08-26 18:25:12,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.75) internal successors, (331), 4 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:12,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:25:12,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:25:12,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 18:25:12,135 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:25:12,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:25:12,135 INFO L85 PathProgramCache]: Analyzing trace with hash -108608815, now seen corresponding path program 1 times [2023-08-26 18:25:12,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:25:12,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114685120] [2023-08-26 18:25:12,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:25:12,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:25:12,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:25:12,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:25:12,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:25:12,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114685120] [2023-08-26 18:25:12,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114685120] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:25:12,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:25:12,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:25:12,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778571649] [2023-08-26 18:25:12,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:25:12,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:25:12,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:25:12,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:25:12,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:25:12,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 172 [2023-08-26 18:25:12,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 19 transitions, 80 flow. Second operand has 5 states, 5 states have (on average 82.4) internal successors, (412), 5 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:12,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:25:12,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 172 [2023-08-26 18:25:12,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:25:12,305 INFO L124 PetriNetUnfolderBase]: 31/79 cut-off events. [2023-08-26 18:25:12,305 INFO L125 PetriNetUnfolderBase]: For 84/97 co-relation queries the response was YES. [2023-08-26 18:25:12,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 79 events. 31/79 cut-off events. For 84/97 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 206 event pairs, 4 based on Foata normal form. 9/88 useless extension candidates. Maximal degree in co-relation 271. Up to 48 conditions per place. [2023-08-26 18:25:12,306 INFO L140 encePairwiseOnDemand]: 166/172 looper letters, 18 selfloop transitions, 7 changer transitions 10/37 dead transitions. [2023-08-26 18:25:12,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 37 transitions, 232 flow [2023-08-26 18:25:12,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 18:25:12,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 18:25:12,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 517 transitions. [2023-08-26 18:25:12,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.500968992248062 [2023-08-26 18:25:12,308 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 517 transitions. [2023-08-26 18:25:12,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 517 transitions. [2023-08-26 18:25:12,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:25:12,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 517 transitions. [2023-08-26 18:25:12,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 86.16666666666667) internal successors, (517), 6 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:12,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 172.0) internal successors, (1204), 7 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:12,312 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 172.0) internal successors, (1204), 7 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:12,312 INFO L175 Difference]: Start difference. First operand has 33 places, 19 transitions, 80 flow. Second operand 6 states and 517 transitions. [2023-08-26 18:25:12,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 37 transitions, 232 flow [2023-08-26 18:25:12,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 37 transitions, 226 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-26 18:25:12,314 INFO L231 Difference]: Finished difference. Result has 37 places, 22 transitions, 130 flow [2023-08-26 18:25:12,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=130, PETRI_PLACES=37, PETRI_TRANSITIONS=22} [2023-08-26 18:25:12,316 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 5 predicate places. [2023-08-26 18:25:12,316 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 22 transitions, 130 flow [2023-08-26 18:25:12,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 82.4) internal successors, (412), 5 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:12,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:25:12,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:25:12,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 18:25:12,317 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:25:12,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:25:12,318 INFO L85 PathProgramCache]: Analyzing trace with hash 927247344, now seen corresponding path program 1 times [2023-08-26 18:25:12,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:25:12,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706030804] [2023-08-26 18:25:12,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:25:12,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:25:12,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:25:12,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:25:12,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:25:12,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706030804] [2023-08-26 18:25:12,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706030804] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:25:12,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:25:12,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 18:25:12,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433513202] [2023-08-26 18:25:12,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:25:12,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 18:25:12,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:25:12,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 18:25:12,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-26 18:25:12,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 172 [2023-08-26 18:25:12,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 22 transitions, 130 flow. Second operand has 6 states, 6 states have (on average 82.16666666666667) internal successors, (493), 6 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:12,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:25:12,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 172 [2023-08-26 18:25:12,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:25:12,531 INFO L124 PetriNetUnfolderBase]: 17/50 cut-off events. [2023-08-26 18:25:12,531 INFO L125 PetriNetUnfolderBase]: For 130/148 co-relation queries the response was YES. [2023-08-26 18:25:12,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 50 events. 17/50 cut-off events. For 130/148 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 88 event pairs, 2 based on Foata normal form. 12/61 useless extension candidates. Maximal degree in co-relation 204. Up to 28 conditions per place. [2023-08-26 18:25:12,532 INFO L140 encePairwiseOnDemand]: 166/172 looper letters, 15 selfloop transitions, 10 changer transitions 5/32 dead transitions. [2023-08-26 18:25:12,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 32 transitions, 244 flow [2023-08-26 18:25:12,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 18:25:12,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 18:25:12,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 592 transitions. [2023-08-26 18:25:12,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49169435215946844 [2023-08-26 18:25:12,534 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 592 transitions. [2023-08-26 18:25:12,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 592 transitions. [2023-08-26 18:25:12,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:25:12,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 592 transitions. [2023-08-26 18:25:12,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 84.57142857142857) internal successors, (592), 7 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:12,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 172.0) internal successors, (1376), 8 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:12,538 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 172.0) internal successors, (1376), 8 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:12,538 INFO L175 Difference]: Start difference. First operand has 37 places, 22 transitions, 130 flow. Second operand 7 states and 592 transitions. [2023-08-26 18:25:12,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 32 transitions, 244 flow [2023-08-26 18:25:12,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 32 transitions, 208 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-08-26 18:25:12,541 INFO L231 Difference]: Finished difference. Result has 40 places, 22 transitions, 132 flow [2023-08-26 18:25:12,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=132, PETRI_PLACES=40, PETRI_TRANSITIONS=22} [2023-08-26 18:25:12,541 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 8 predicate places. [2023-08-26 18:25:12,542 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 22 transitions, 132 flow [2023-08-26 18:25:12,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 82.16666666666667) internal successors, (493), 6 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:12,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:25:12,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:25:12,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 18:25:12,543 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:25:12,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:25:12,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1932193236, now seen corresponding path program 1 times [2023-08-26 18:25:12,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:25:12,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834486459] [2023-08-26 18:25:12,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:25:12,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:25:12,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:25:12,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:25:12,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:25:12,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834486459] [2023-08-26 18:25:12,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834486459] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:25:12,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:25:12,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:25:12,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295817032] [2023-08-26 18:25:12,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:25:12,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:25:12,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:25:12,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:25:12,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:25:12,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 172 [2023-08-26 18:25:12,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 22 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 84.75) internal successors, (339), 4 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:12,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:25:12,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 172 [2023-08-26 18:25:12,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:25:12,704 INFO L124 PetriNetUnfolderBase]: 18/49 cut-off events. [2023-08-26 18:25:12,704 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2023-08-26 18:25:12,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 49 events. 18/49 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 73 event pairs, 4 based on Foata normal form. 1/50 useless extension candidates. Maximal degree in co-relation 184. Up to 24 conditions per place. [2023-08-26 18:25:12,705 INFO L140 encePairwiseOnDemand]: 169/172 looper letters, 0 selfloop transitions, 0 changer transitions 27/27 dead transitions. [2023-08-26 18:25:12,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 27 transitions, 210 flow [2023-08-26 18:25:12,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:25:12,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:25:12,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 343 transitions. [2023-08-26 18:25:12,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.498546511627907 [2023-08-26 18:25:12,706 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 343 transitions. [2023-08-26 18:25:12,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 343 transitions. [2023-08-26 18:25:12,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:25:12,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 343 transitions. [2023-08-26 18:25:12,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 85.75) internal successors, (343), 4 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:12,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:12,709 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:12,709 INFO L175 Difference]: Start difference. First operand has 40 places, 22 transitions, 132 flow. Second operand 4 states and 343 transitions. [2023-08-26 18:25:12,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 27 transitions, 210 flow [2023-08-26 18:25:12,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 27 transitions, 170 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-08-26 18:25:12,710 INFO L231 Difference]: Finished difference. Result has 35 places, 0 transitions, 0 flow [2023-08-26 18:25:12,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=35, PETRI_TRANSITIONS=0} [2023-08-26 18:25:12,711 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-08-26 18:25:12,711 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 0 transitions, 0 flow [2023-08-26 18:25:12,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.75) internal successors, (339), 4 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:12,714 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 10 remaining) [2023-08-26 18:25:12,714 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2023-08-26 18:25:12,714 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-08-26 18:25:12,714 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2023-08-26 18:25:12,714 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2023-08-26 18:25:12,715 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2023-08-26 18:25:12,715 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONASSERT (3 of 10 remaining) [2023-08-26 18:25:12,715 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 10 remaining) [2023-08-26 18:25:12,715 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 10 remaining) [2023-08-26 18:25:12,715 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 10 remaining) [2023-08-26 18:25:12,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 18:25:12,716 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:25:12,718 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 18:25:12,718 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 18:25:12,723 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 06:25:12 BasicIcfg [2023-08-26 18:25:12,723 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 18:25:12,724 INFO L158 Benchmark]: Toolchain (without parser) took 6030.53ms. Allocated memory was 360.7MB in the beginning and 564.1MB in the end (delta: 203.4MB). Free memory was 315.6MB in the beginning and 305.7MB in the end (delta: 9.9MB). Peak memory consumption was 216.5MB. Max. memory is 16.0GB. [2023-08-26 18:25:12,724 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 360.7MB. Free memory was 338.1MB in the beginning and 338.0MB in the end (delta: 94.3kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 18:25:12,724 INFO L158 Benchmark]: CACSL2BoogieTranslator took 512.51ms. Allocated memory is still 360.7MB. Free memory was 314.6MB in the beginning and 294.7MB in the end (delta: 19.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 18:25:12,725 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.28ms. Allocated memory is still 360.7MB. Free memory was 294.7MB in the beginning and 292.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 18:25:12,725 INFO L158 Benchmark]: Boogie Preprocessor took 34.30ms. Allocated memory is still 360.7MB. Free memory was 292.6MB in the beginning and 291.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 18:25:12,726 INFO L158 Benchmark]: RCFGBuilder took 344.86ms. Allocated memory is still 360.7MB. Free memory was 291.5MB in the beginning and 274.7MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-26 18:25:12,727 INFO L158 Benchmark]: TraceAbstraction took 5073.73ms. Allocated memory was 360.7MB in the beginning and 564.1MB in the end (delta: 203.4MB). Free memory was 273.7MB in the beginning and 305.7MB in the end (delta: -32.0MB). Peak memory consumption was 174.6MB. Max. memory is 16.0GB. [2023-08-26 18:25:12,728 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 360.7MB. Free memory was 338.1MB in the beginning and 338.0MB in the end (delta: 94.3kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 512.51ms. Allocated memory is still 360.7MB. Free memory was 314.6MB in the beginning and 294.7MB in the end (delta: 19.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 57.28ms. Allocated memory is still 360.7MB. Free memory was 294.7MB in the beginning and 292.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 34.30ms. Allocated memory is still 360.7MB. Free memory was 292.6MB in the beginning and 291.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 344.86ms. Allocated memory is still 360.7MB. Free memory was 291.5MB in the beginning and 274.7MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 5073.73ms. Allocated memory was 360.7MB in the beginning and 564.1MB in the end (delta: 203.4MB). Free memory was 273.7MB in the beginning and 305.7MB in the end (delta: -32.0MB). Peak memory consumption was 174.6MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.5s, 86 PlacesBefore, 32 PlacesAfterwards, 77 TransitionsBefore, 22 TransitionsAfterwards, 1110 CoEnabledTransitionPairs, 5 FixpointIterations, 28 TrivialSequentialCompositions, 46 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 3 ConcurrentYvCompositions, 1 ChoiceCompositions, 78 TotalNumberOfCompositions, 1919 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1102, independent: 1034, independent conditional: 0, independent unconditional: 1034, dependent: 68, dependent conditional: 0, dependent unconditional: 68, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 586, independent: 558, independent conditional: 0, independent unconditional: 558, dependent: 28, dependent conditional: 0, dependent unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1102, independent: 476, independent conditional: 0, independent unconditional: 476, dependent: 40, dependent conditional: 0, dependent unconditional: 40, unknown: 586, unknown conditional: 0, unknown unconditional: 586] , Statistics on independence cache: Total cache size (in pairs): 49, Positive cache size: 41, Positive conditional cache size: 0, Positive unconditional cache size: 41, Negative cache size: 8, Negative conditional cache size: 0, Negative unconditional cache size: 8, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 17]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 115 locations, 10 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5.0s, OverallIterations: 10, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 100 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 100 mSDsluCounter, 9 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 382 IncrementalHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 mSolverCounterUnsat, 5 mSDtfsCounter, 382 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=132occurred in iteration=9, InterpolantAutomatonStates: 41, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 103 NumberOfCodeBlocks, 103 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 93 ConstructedInterpolants, 0 QuantifiedInterpolants, 397 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 18:25:12,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...