/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/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 18:25:49,615 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 18:25:49,650 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 18:25:49,653 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 18:25:49,654 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 18:25:49,668 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 18:25:49,669 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 18:25:49,669 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 18:25:49,670 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 18:25:49,670 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 18:25:49,670 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 18:25:49,670 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 18:25:49,671 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 18:25:49,671 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 18:25:49,671 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 18:25:49,671 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 18:25:49,672 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 18:25:49,672 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 18:25:49,672 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 18:25:49,672 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 18:25:49,673 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 18:25:49,673 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 18:25:49,673 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 18:25:49,673 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 18:25:49,673 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 18:25:49,674 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 18:25:49,674 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 18:25:49,674 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:25:49,674 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 18:25:49,674 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 18:25:49,674 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 18:25:49,675 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 18:25:49,675 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 18:25:49,675 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 18:25:49,675 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 18:25:49,675 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 18:25:49,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 18:25:49,965 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 18:25:49,966 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 18:25:49,967 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 18:25:49,967 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 18:25:49,972 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2023-08-26 18:25:51,034 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 18:25:51,190 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 18:25:51,190 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2023-08-26 18:25:51,209 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0b627ae2/3116f746d8cf434887126afd382d719e/FLAGff34bbf65 [2023-08-26 18:25:51,222 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0b627ae2/3116f746d8cf434887126afd382d719e [2023-08-26 18:25:51,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 18:25:51,225 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 18:25:51,226 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 18:25:51,226 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 18:25:51,232 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 18:25:51,233 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:25:51" (1/1) ... [2023-08-26 18:25:51,234 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@354d177e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:25:51, skipping insertion in model container [2023-08-26 18:25:51,234 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:25:51" (1/1) ... [2023-08-26 18:25:51,262 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 18:25:51,516 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:25:51,523 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 18:25:51,547 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 18:25:51,548 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 18:25:51,575 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:25:51,599 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 18:25:51,599 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 18:25:51,604 INFO L206 MainTranslator]: Completed translation [2023-08-26 18:25:51,606 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:25:51 WrapperNode [2023-08-26 18:25:51,606 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 18:25:51,607 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 18:25:51,607 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 18:25:51,607 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 18:25:51,611 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:25:51" (1/1) ... [2023-08-26 18:25:51,634 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:25:51" (1/1) ... [2023-08-26 18:25:51,652 INFO L138 Inliner]: procedures = 177, calls = 63, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 85 [2023-08-26 18:25:51,653 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 18:25:51,653 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 18:25:51,654 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 18:25:51,654 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 18:25:51,659 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:25:51" (1/1) ... [2023-08-26 18:25:51,660 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:25:51" (1/1) ... [2023-08-26 18:25:51,668 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:25:51" (1/1) ... [2023-08-26 18:25:51,668 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:25:51" (1/1) ... [2023-08-26 18:25:51,687 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:25:51" (1/1) ... [2023-08-26 18:25:51,688 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:25:51" (1/1) ... [2023-08-26 18:25:51,689 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:25:51" (1/1) ... [2023-08-26 18:25:51,690 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:25:51" (1/1) ... [2023-08-26 18:25:51,692 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 18:25:51,692 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 18:25:51,692 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 18:25:51,692 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 18:25:51,693 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:25:51" (1/1) ... [2023-08-26 18:25:51,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:25:51,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:25:51,755 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 18:25:51,813 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 18:25:51,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 18:25:51,824 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 18:25:51,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 18:25:51,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 18:25:51,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 18:25:51,824 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-26 18:25:51,825 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-26 18:25:51,825 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-26 18:25:51,825 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-26 18:25:51,825 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-26 18:25:51,825 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-26 18:25:51,825 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-26 18:25:51,825 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-26 18:25:51,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 18:25:51,826 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 18:25:51,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 18:25:51,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 18:25:51,828 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 18:25:51,918 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 18:25:51,919 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 18:25:52,124 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 18:25:52,129 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 18:25:52,129 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 18:25:52,130 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:25:52 BoogieIcfgContainer [2023-08-26 18:25:52,131 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 18:25:52,132 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 18:25:52,132 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 18:25:52,134 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 18:25:52,134 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 06:25:51" (1/3) ... [2023-08-26 18:25:52,135 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fe585db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:25:52, skipping insertion in model container [2023-08-26 18:25:52,135 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:25:51" (2/3) ... [2023-08-26 18:25:52,135 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fe585db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:25:52, skipping insertion in model container [2023-08-26 18:25:52,135 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:25:52" (3/3) ... [2023-08-26 18:25:52,136 INFO L112 eAbstractionObserver]: Analyzing ICFG safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2023-08-26 18:25:52,154 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 18:25:52,155 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-08-26 18:25:52,155 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 18:25:52,218 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 18:25:52,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 111 transitions, 242 flow [2023-08-26 18:25:52,291 INFO L124 PetriNetUnfolderBase]: 3/107 cut-off events. [2023-08-26 18:25:52,292 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:25:52,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 107 events. 3/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 87 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2023-08-26 18:25:52,296 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 111 transitions, 242 flow [2023-08-26 18:25:52,299 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 91 transitions, 194 flow [2023-08-26 18:25:52,302 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:25:52,315 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 91 transitions, 194 flow [2023-08-26 18:25:52,318 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 91 transitions, 194 flow [2023-08-26 18:25:52,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 91 transitions, 194 flow [2023-08-26 18:25:52,340 INFO L124 PetriNetUnfolderBase]: 1/91 cut-off events. [2023-08-26 18:25:52,340 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:25:52,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 91 events. 1/91 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. 0/82 useless extension candidates. Maximal degree in co-relation 73. Up to 2 conditions per place. [2023-08-26 18:25:52,342 INFO L119 LiptonReduction]: Number of co-enabled transitions 1766 [2023-08-26 18:25:54,637 INFO L134 LiptonReduction]: Checked pairs total: 2807 [2023-08-26 18:25:54,637 INFO L136 LiptonReduction]: Total number of compositions: 94 [2023-08-26 18:25:54,646 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:25:54,650 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;@505af6e3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:25:54,651 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2023-08-26 18:25:54,651 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:25:54,652 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 18:25:54,652 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:25:54,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:25:54,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 18:25:54,652 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 18:25:54,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:25:54,656 INFO L85 PathProgramCache]: Analyzing trace with hash 381, now seen corresponding path program 1 times [2023-08-26 18:25:54,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:25:54,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081184220] [2023-08-26 18:25:54,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:25:54,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:25:54,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:25:54,730 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 18:25:54,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:25:54,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081184220] [2023-08-26 18:25:54,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081184220] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:25:54,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:25:54,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 18:25:54,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535374112] [2023-08-26 18:25:54,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:25:54,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 18:25:54,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:25:54,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 18:25:54,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 18:25:54,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 205 [2023-08-26 18:25:54,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 28 transitions, 68 flow. Second operand has 2 states, 2 states have (on average 103.5) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states 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 18:25:54,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:25:54,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 205 [2023-08-26 18:25:54,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:25:54,857 INFO L124 PetriNetUnfolderBase]: 704/1037 cut-off events. [2023-08-26 18:25:54,857 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-26 18:25:54,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2149 conditions, 1037 events. 704/1037 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4333 event pairs, 704 based on Foata normal form. 0/1027 useless extension candidates. Maximal degree in co-relation 2137. Up to 1027 conditions per place. [2023-08-26 18:25:54,865 INFO L140 encePairwiseOnDemand]: 197/205 looper letters, 18 selfloop transitions, 0 changer transitions 0/20 dead transitions. [2023-08-26 18:25:54,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 20 transitions, 88 flow [2023-08-26 18:25:54,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 18:25:54,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 18:25:54,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 232 transitions. [2023-08-26 18:25:54,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658536585365853 [2023-08-26 18:25:54,875 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 232 transitions. [2023-08-26 18:25:54,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 232 transitions. [2023-08-26 18:25:54,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:25:54,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 232 transitions. [2023-08-26 18:25:54,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 116.0) internal successors, (232), 2 states have internal predecessors, (232), 0 states have call successors, (0), 0 states 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 18:25:54,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states 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 18:25:54,884 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states 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 18:25:54,885 INFO L175 Difference]: Start difference. First operand has 41 places, 28 transitions, 68 flow. Second operand 2 states and 232 transitions. [2023-08-26 18:25:54,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 20 transitions, 88 flow [2023-08-26 18:25:54,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 20 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 18:25:54,889 INFO L231 Difference]: Finished difference. Result has 30 places, 20 transitions, 48 flow [2023-08-26 18:25:54,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=48, PETRI_PLACES=30, PETRI_TRANSITIONS=20} [2023-08-26 18:25:54,893 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -11 predicate places. [2023-08-26 18:25:54,893 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 20 transitions, 48 flow [2023-08-26 18:25:54,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 103.5) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states 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 18:25:54,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:25:54,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:25:54,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 18:25:54,894 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 18:25:54,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:25:54,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1792526947, now seen corresponding path program 1 times [2023-08-26 18:25:54,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:25:54,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395543971] [2023-08-26 18:25:54,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:25:54,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:25:54,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:25:55,235 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 18:25:55,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:25:55,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395543971] [2023-08-26 18:25:55,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395543971] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:25:55,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:25:55,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:25:55,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698043128] [2023-08-26 18:25:55,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:25:55,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:25:55,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:25:55,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:25:55,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:25:55,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 205 [2023-08-26 18:25:55,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 20 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states 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 18:25:55,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:25:55,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 205 [2023-08-26 18:25:55,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:25:55,466 INFO L124 PetriNetUnfolderBase]: 1747/2539 cut-off events. [2023-08-26 18:25:55,466 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:25:55,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5247 conditions, 2539 events. 1747/2539 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 11298 event pairs, 696 based on Foata normal form. 75/2614 useless extension candidates. Maximal degree in co-relation 5244. Up to 1811 conditions per place. [2023-08-26 18:25:55,480 INFO L140 encePairwiseOnDemand]: 198/205 looper letters, 30 selfloop transitions, 6 changer transitions 0/36 dead transitions. [2023-08-26 18:25:55,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 36 transitions, 158 flow [2023-08-26 18:25:55,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:25:55,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:25:55,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 316 transitions. [2023-08-26 18:25:55,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138211382113821 [2023-08-26 18:25:55,486 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 316 transitions. [2023-08-26 18:25:55,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 316 transitions. [2023-08-26 18:25:55,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:25:55,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 316 transitions. [2023-08-26 18:25:55,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states 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 18:25:55,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states 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 18:25:55,492 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states 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 18:25:55,492 INFO L175 Difference]: Start difference. First operand has 30 places, 20 transitions, 48 flow. Second operand 3 states and 316 transitions. [2023-08-26 18:25:55,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 36 transitions, 158 flow [2023-08-26 18:25:55,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 36 transitions, 158 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:25:55,495 INFO L231 Difference]: Finished difference. Result has 33 places, 24 transitions, 84 flow [2023-08-26 18:25:55,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=33, PETRI_TRANSITIONS=24} [2023-08-26 18:25:55,496 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -8 predicate places. [2023-08-26 18:25:55,496 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 24 transitions, 84 flow [2023-08-26 18:25:55,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states 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 18:25:55,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:25:55,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:25:55,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 18:25:55,502 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 18:25:55,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:25:55,503 INFO L85 PathProgramCache]: Analyzing trace with hash -266240936, now seen corresponding path program 1 times [2023-08-26 18:25:55,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:25:55,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179126617] [2023-08-26 18:25:55,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:25:55,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:25:55,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:25:55,660 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 18:25:55,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:25:55,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179126617] [2023-08-26 18:25:55,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179126617] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:25:55,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:25:55,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:25:55,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612448612] [2023-08-26 18:25:55,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:25:55,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:25:55,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:25:55,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:25:55,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:25:55,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 205 [2023-08-26 18:25:55,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 24 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states 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 18:25:55,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:25:55,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 205 [2023-08-26 18:25:55,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:25:55,789 INFO L124 PetriNetUnfolderBase]: 1463/2167 cut-off events. [2023-08-26 18:25:55,790 INFO L125 PetriNetUnfolderBase]: For 568/568 co-relation queries the response was YES. [2023-08-26 18:25:55,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5345 conditions, 2167 events. 1463/2167 cut-off events. For 568/568 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 9965 event pairs, 429 based on Foata normal form. 18/2100 useless extension candidates. Maximal degree in co-relation 5340. Up to 1800 conditions per place. [2023-08-26 18:25:55,801 INFO L140 encePairwiseOnDemand]: 201/205 looper letters, 30 selfloop transitions, 4 changer transitions 0/36 dead transitions. [2023-08-26 18:25:55,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 36 transitions, 193 flow [2023-08-26 18:25:55,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:25:55,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:25:55,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 324 transitions. [2023-08-26 18:25:55,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526829268292683 [2023-08-26 18:25:55,803 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 324 transitions. [2023-08-26 18:25:55,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 324 transitions. [2023-08-26 18:25:55,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:25:55,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 324 transitions. [2023-08-26 18:25:55,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states 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 18:25:55,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states 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 18:25:55,805 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states 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 18:25:55,805 INFO L175 Difference]: Start difference. First operand has 33 places, 24 transitions, 84 flow. Second operand 3 states and 324 transitions. [2023-08-26 18:25:55,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 36 transitions, 193 flow [2023-08-26 18:25:55,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 36 transitions, 184 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:25:55,813 INFO L231 Difference]: Finished difference. Result has 35 places, 27 transitions, 110 flow [2023-08-26 18:25:55,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=35, PETRI_TRANSITIONS=27} [2023-08-26 18:25:55,814 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -6 predicate places. [2023-08-26 18:25:55,814 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 27 transitions, 110 flow [2023-08-26 18:25:55,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states 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 18:25:55,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:25:55,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:25:55,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 18:25:55,817 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 18:25:55,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:25:55,818 INFO L85 PathProgramCache]: Analyzing trace with hash -266241680, now seen corresponding path program 1 times [2023-08-26 18:25:55,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:25:55,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133289483] [2023-08-26 18:25:55,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:25:55,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:25:55,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:25:55,939 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 18:25:55,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:25:55,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133289483] [2023-08-26 18:25:55,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133289483] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:25:55,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:25:55,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:25:55,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254624349] [2023-08-26 18:25:55,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:25:55,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:25:55,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:25:55,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:25:55,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:25:55,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 205 [2023-08-26 18:25:55,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 95.75) internal successors, (383), 4 states have internal predecessors, (383), 0 states have call successors, (0), 0 states 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 18:25:55,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:25:55,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 205 [2023-08-26 18:25:55,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:25:56,105 INFO L124 PetriNetUnfolderBase]: 1560/2283 cut-off events. [2023-08-26 18:25:56,105 INFO L125 PetriNetUnfolderBase]: For 587/587 co-relation queries the response was YES. [2023-08-26 18:25:56,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5998 conditions, 2283 events. 1560/2283 cut-off events. For 587/587 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 9899 event pairs, 210 based on Foata normal form. 24/2307 useless extension candidates. Maximal degree in co-relation 5992. Up to 1314 conditions per place. [2023-08-26 18:25:56,115 INFO L140 encePairwiseOnDemand]: 198/205 looper letters, 38 selfloop transitions, 8 changer transitions 0/46 dead transitions. [2023-08-26 18:25:56,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 46 transitions, 255 flow [2023-08-26 18:25:56,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:25:56,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:25:56,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 414 transitions. [2023-08-26 18:25:56,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048780487804878 [2023-08-26 18:25:56,117 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 414 transitions. [2023-08-26 18:25:56,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 414 transitions. [2023-08-26 18:25:56,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:25:56,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 414 transitions. [2023-08-26 18:25:56,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:56,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states 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 18:25:56,120 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states 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 18:25:56,120 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 110 flow. Second operand 4 states and 414 transitions. [2023-08-26 18:25:56,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 46 transitions, 255 flow [2023-08-26 18:25:56,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 46 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:25:56,121 INFO L231 Difference]: Finished difference. Result has 39 places, 28 transitions, 138 flow [2023-08-26 18:25:56,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=39, PETRI_TRANSITIONS=28} [2023-08-26 18:25:56,123 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -2 predicate places. [2023-08-26 18:25:56,123 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 28 transitions, 138 flow [2023-08-26 18:25:56,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.75) internal successors, (383), 4 states have internal predecessors, (383), 0 states have call successors, (0), 0 states 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 18:25:56,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:25:56,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:25:56,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 18:25:56,123 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 18:25:56,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:25:56,124 INFO L85 PathProgramCache]: Analyzing trace with hash 336459543, now seen corresponding path program 1 times [2023-08-26 18:25:56,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:25:56,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445558583] [2023-08-26 18:25:56,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:25:56,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:25:56,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:25:56,237 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 18:25:56,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:25:56,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445558583] [2023-08-26 18:25:56,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445558583] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:25:56,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:25:56,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:25:56,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87689366] [2023-08-26 18:25:56,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:25:56,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:25:56,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:25:56,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:25:56,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:25:56,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 205 [2023-08-26 18:25:56,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 28 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states 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 18:25:56,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:25:56,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 205 [2023-08-26 18:25:56,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:25:56,403 INFO L124 PetriNetUnfolderBase]: 1743/2639 cut-off events. [2023-08-26 18:25:56,403 INFO L125 PetriNetUnfolderBase]: For 2515/2608 co-relation queries the response was YES. [2023-08-26 18:25:56,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7569 conditions, 2639 events. 1743/2639 cut-off events. For 2515/2608 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 13346 event pairs, 389 based on Foata normal form. 169/2794 useless extension candidates. Maximal degree in co-relation 7561. Up to 1080 conditions per place. [2023-08-26 18:25:56,412 INFO L140 encePairwiseOnDemand]: 201/205 looper letters, 43 selfloop transitions, 4 changer transitions 12/61 dead transitions. [2023-08-26 18:25:56,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 61 transitions, 404 flow [2023-08-26 18:25:56,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:25:56,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:25:56,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 431 transitions. [2023-08-26 18:25:56,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525609756097561 [2023-08-26 18:25:56,414 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 431 transitions. [2023-08-26 18:25:56,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 431 transitions. [2023-08-26 18:25:56,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:25:56,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 431 transitions. [2023-08-26 18:25:56,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states 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 18:25:56,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states 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 18:25:56,416 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states 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 18:25:56,416 INFO L175 Difference]: Start difference. First operand has 39 places, 28 transitions, 138 flow. Second operand 4 states and 431 transitions. [2023-08-26 18:25:56,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 61 transitions, 404 flow [2023-08-26 18:25:56,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 61 transitions, 377 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-26 18:25:56,460 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 142 flow [2023-08-26 18:25:56,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=42, PETRI_TRANSITIONS=28} [2023-08-26 18:25:56,460 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 1 predicate places. [2023-08-26 18:25:56,460 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 142 flow [2023-08-26 18:25:56,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states 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 18:25:56,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:25:56,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:25:56,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 18:25:56,461 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 18:25:56,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:25:56,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1839702661, now seen corresponding path program 1 times [2023-08-26 18:25:56,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:25:56,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171049615] [2023-08-26 18:25:56,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:25:56,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:25:56,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:25:56,527 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 18:25:56,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:25:56,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171049615] [2023-08-26 18:25:56,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171049615] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:25:56,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:25:56,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:25:56,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113694175] [2023-08-26 18:25:56,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:25:56,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:25:56,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:25:56,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:25:56,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:25:56,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 205 [2023-08-26 18:25:56,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 28 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states 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 18:25:56,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:25:56,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 205 [2023-08-26 18:25:56,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:25:56,621 INFO L124 PetriNetUnfolderBase]: 788/1273 cut-off events. [2023-08-26 18:25:56,621 INFO L125 PetriNetUnfolderBase]: For 1438/1448 co-relation queries the response was YES. [2023-08-26 18:25:56,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3725 conditions, 1273 events. 788/1273 cut-off events. For 1438/1448 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5795 event pairs, 314 based on Foata normal form. 20/1269 useless extension candidates. Maximal degree in co-relation 3715. Up to 947 conditions per place. [2023-08-26 18:25:56,626 INFO L140 encePairwiseOnDemand]: 202/205 looper letters, 34 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2023-08-26 18:25:56,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 270 flow [2023-08-26 18:25:56,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:25:56,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:25:56,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 332 transitions. [2023-08-26 18:25:56,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5398373983739837 [2023-08-26 18:25:56,628 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 332 transitions. [2023-08-26 18:25:56,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 332 transitions. [2023-08-26 18:25:56,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:25:56,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 332 transitions. [2023-08-26 18:25:56,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states 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 18:25:56,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states 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 18:25:56,630 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states 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 18:25:56,630 INFO L175 Difference]: Start difference. First operand has 42 places, 28 transitions, 142 flow. Second operand 3 states and 332 transitions. [2023-08-26 18:25:56,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 270 flow [2023-08-26 18:25:56,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 42 transitions, 251 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-26 18:25:56,632 INFO L231 Difference]: Finished difference. Result has 41 places, 28 transitions, 142 flow [2023-08-26 18:25:56,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=41, PETRI_TRANSITIONS=28} [2023-08-26 18:25:56,633 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2023-08-26 18:25:56,633 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 28 transitions, 142 flow [2023-08-26 18:25:56,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states 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 18:25:56,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:25:56,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:25:56,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 18:25:56,634 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 18:25:56,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:25:56,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1533108784, now seen corresponding path program 1 times [2023-08-26 18:25:56,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:25:56,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297487211] [2023-08-26 18:25:56,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:25:56,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:25:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:25:56,700 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 18:25:56,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:25:56,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297487211] [2023-08-26 18:25:56,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297487211] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:25:56,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:25:56,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:25:56,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187021530] [2023-08-26 18:25:56,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:25:56,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:25:56,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:25:56,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:25:56,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:25:56,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 205 [2023-08-26 18:25:56,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 28 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 0 states have call successors, (0), 0 states 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 18:25:56,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:25:56,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 205 [2023-08-26 18:25:56,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:25:56,845 INFO L124 PetriNetUnfolderBase]: 1148/1808 cut-off events. [2023-08-26 18:25:56,845 INFO L125 PetriNetUnfolderBase]: For 1880/1880 co-relation queries the response was YES. [2023-08-26 18:25:56,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5078 conditions, 1808 events. 1148/1808 cut-off events. For 1880/1880 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 8726 event pairs, 311 based on Foata normal form. 42/1813 useless extension candidates. Maximal degree in co-relation 5069. Up to 773 conditions per place. [2023-08-26 18:25:56,852 INFO L140 encePairwiseOnDemand]: 200/205 looper letters, 33 selfloop transitions, 6 changer transitions 6/47 dead transitions. [2023-08-26 18:25:56,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 47 transitions, 299 flow [2023-08-26 18:25:56,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:25:56,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:25:56,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 429 transitions. [2023-08-26 18:25:56,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5231707317073171 [2023-08-26 18:25:56,854 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 429 transitions. [2023-08-26 18:25:56,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 429 transitions. [2023-08-26 18:25:56,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:25:56,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 429 transitions. [2023-08-26 18:25:56,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 0 states have call successors, (0), 0 states 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 18:25:56,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states 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 18:25:56,856 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states 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 18:25:56,856 INFO L175 Difference]: Start difference. First operand has 41 places, 28 transitions, 142 flow. Second operand 4 states and 429 transitions. [2023-08-26 18:25:56,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 47 transitions, 299 flow [2023-08-26 18:25:56,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 47 transitions, 289 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:25:56,860 INFO L231 Difference]: Finished difference. Result has 43 places, 27 transitions, 146 flow [2023-08-26 18:25:56,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=43, PETRI_TRANSITIONS=27} [2023-08-26 18:25:56,861 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2023-08-26 18:25:56,861 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 27 transitions, 146 flow [2023-08-26 18:25:56,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 0 states have call successors, (0), 0 states 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 18:25:56,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:25:56,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:25:56,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 18:25:56,862 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 18:25:56,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:25:56,862 INFO L85 PathProgramCache]: Analyzing trace with hash -632393492, now seen corresponding path program 1 times [2023-08-26 18:25:56,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:25:56,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321091558] [2023-08-26 18:25:56,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:25:56,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:25:56,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:25:56,969 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 18:25:56,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:25:56,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321091558] [2023-08-26 18:25:56,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321091558] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:25:56,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:25:56,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:25:56,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772301639] [2023-08-26 18:25:56,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:25:56,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:25:56,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:25:56,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:25:56,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:25:56,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 205 [2023-08-26 18:25:56,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 27 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 96.5) internal successors, (386), 4 states have internal predecessors, (386), 0 states have call successors, (0), 0 states 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 18:25:56,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:25:56,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 205 [2023-08-26 18:25:56,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:25:57,059 INFO L124 PetriNetUnfolderBase]: 770/1195 cut-off events. [2023-08-26 18:25:57,060 INFO L125 PetriNetUnfolderBase]: For 1444/1444 co-relation queries the response was YES. [2023-08-26 18:25:57,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3427 conditions, 1195 events. 770/1195 cut-off events. For 1444/1444 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4974 event pairs, 134 based on Foata normal form. 36/1231 useless extension candidates. Maximal degree in co-relation 3417. Up to 600 conditions per place. [2023-08-26 18:25:57,064 INFO L140 encePairwiseOnDemand]: 200/205 looper letters, 33 selfloop transitions, 7 changer transitions 0/40 dead transitions. [2023-08-26 18:25:57,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 40 transitions, 259 flow [2023-08-26 18:25:57,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:25:57,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:25:57,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 410 transitions. [2023-08-26 18:25:57,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-26 18:25:57,066 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 410 transitions. [2023-08-26 18:25:57,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 410 transitions. [2023-08-26 18:25:57,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:25:57,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 410 transitions. [2023-08-26 18:25:57,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 102.5) internal successors, (410), 4 states have internal predecessors, (410), 0 states have call successors, (0), 0 states 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 18:25:57,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states 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 18:25:57,068 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states 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 18:25:57,068 INFO L175 Difference]: Start difference. First operand has 43 places, 27 transitions, 146 flow. Second operand 4 states and 410 transitions. [2023-08-26 18:25:57,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 40 transitions, 259 flow [2023-08-26 18:25:57,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 237 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-08-26 18:25:57,071 INFO L231 Difference]: Finished difference. Result has 42 places, 27 transitions, 144 flow [2023-08-26 18:25:57,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=144, PETRI_PLACES=42, PETRI_TRANSITIONS=27} [2023-08-26 18:25:57,071 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 1 predicate places. [2023-08-26 18:25:57,071 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 27 transitions, 144 flow [2023-08-26 18:25:57,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 96.5) internal successors, (386), 4 states have internal predecessors, (386), 0 states have call successors, (0), 0 states 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 18:25:57,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:25:57,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:25:57,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 18:25:57,072 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 18:25:57,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:25:57,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1533246424, now seen corresponding path program 2 times [2023-08-26 18:25:57,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:25:57,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480790014] [2023-08-26 18:25:57,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:25:57,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:25:57,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:25:57,208 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 18:25:57,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:25:57,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480790014] [2023-08-26 18:25:57,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480790014] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:25:57,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:25:57,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:25:57,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299010117] [2023-08-26 18:25:57,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:25:57,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:25:57,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:25:57,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:25:57,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:25:57,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 205 [2023-08-26 18:25:57,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 27 transitions, 144 flow. Second operand has 4 states, 4 states have (on average 98.5) internal successors, (394), 4 states have internal predecessors, (394), 0 states have call successors, (0), 0 states 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 18:25:57,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:25:57,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 205 [2023-08-26 18:25:57,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:25:57,322 INFO L124 PetriNetUnfolderBase]: 661/1106 cut-off events. [2023-08-26 18:25:57,322 INFO L125 PetriNetUnfolderBase]: For 1744/1777 co-relation queries the response was YES. [2023-08-26 18:25:57,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3047 conditions, 1106 events. 661/1106 cut-off events. For 1744/1777 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 5769 event pairs, 235 based on Foata normal form. 51/1105 useless extension candidates. Maximal degree in co-relation 3038. Up to 722 conditions per place. [2023-08-26 18:25:57,331 INFO L140 encePairwiseOnDemand]: 198/205 looper letters, 35 selfloop transitions, 5 changer transitions 27/71 dead transitions. [2023-08-26 18:25:57,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 71 transitions, 499 flow [2023-08-26 18:25:57,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 18:25:57,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 18:25:57,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 524 transitions. [2023-08-26 18:25:57,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.511219512195122 [2023-08-26 18:25:57,333 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 524 transitions. [2023-08-26 18:25:57,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 524 transitions. [2023-08-26 18:25:57,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:25:57,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 524 transitions. [2023-08-26 18:25:57,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:57,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states 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 18:25:57,335 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states 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 18:25:57,336 INFO L175 Difference]: Start difference. First operand has 42 places, 27 transitions, 144 flow. Second operand 5 states and 524 transitions. [2023-08-26 18:25:57,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 71 transitions, 499 flow [2023-08-26 18:25:57,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 71 transitions, 452 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-26 18:25:57,338 INFO L231 Difference]: Finished difference. Result has 47 places, 31 transitions, 172 flow [2023-08-26 18:25:57,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=47, PETRI_TRANSITIONS=31} [2023-08-26 18:25:57,339 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 6 predicate places. [2023-08-26 18:25:57,339 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 31 transitions, 172 flow [2023-08-26 18:25:57,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 98.5) internal successors, (394), 4 states have internal predecessors, (394), 0 states have call successors, (0), 0 states 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 18:25:57,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:25:57,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:25:57,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 18:25:57,339 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 18:25:57,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:25:57,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1811248285, now seen corresponding path program 1 times [2023-08-26 18:25:57,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:25:57,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039123] [2023-08-26 18:25:57,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:25:57,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:25:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:25:57,426 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 18:25:57,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:25:57,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039123] [2023-08-26 18:25:57,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039123] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:25:57,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:25:57,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:25:57,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64808137] [2023-08-26 18:25:57,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:25:57,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:25:57,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:25:57,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:25:57,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:25:57,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 205 [2023-08-26 18:25:57,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 31 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 98.0) internal successors, (490), 5 states have internal predecessors, (490), 0 states have call successors, (0), 0 states 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 18:25:57,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:25:57,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 205 [2023-08-26 18:25:57,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:25:57,519 INFO L124 PetriNetUnfolderBase]: 474/835 cut-off events. [2023-08-26 18:25:57,519 INFO L125 PetriNetUnfolderBase]: For 1909/2053 co-relation queries the response was YES. [2023-08-26 18:25:57,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3270 conditions, 835 events. 474/835 cut-off events. For 1909/2053 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 4266 event pairs, 58 based on Foata normal form. 56/868 useless extension candidates. Maximal degree in co-relation 3258. Up to 565 conditions per place. [2023-08-26 18:25:57,522 INFO L140 encePairwiseOnDemand]: 198/205 looper letters, 55 selfloop transitions, 13 changer transitions 8/80 dead transitions. [2023-08-26 18:25:57,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 80 transitions, 582 flow [2023-08-26 18:25:57,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 18:25:57,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 18:25:57,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 629 transitions. [2023-08-26 18:25:57,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113821138211382 [2023-08-26 18:25:57,523 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 629 transitions. [2023-08-26 18:25:57,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 629 transitions. [2023-08-26 18:25:57,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:25:57,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 629 transitions. [2023-08-26 18:25:57,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 104.83333333333333) internal successors, (629), 6 states have internal predecessors, (629), 0 states have call successors, (0), 0 states 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 18:25:57,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 205.0) internal successors, (1435), 7 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states 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 18:25:57,526 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 205.0) internal successors, (1435), 7 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states 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 18:25:57,526 INFO L175 Difference]: Start difference. First operand has 47 places, 31 transitions, 172 flow. Second operand 6 states and 629 transitions. [2023-08-26 18:25:57,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 80 transitions, 582 flow [2023-08-26 18:25:57,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 80 transitions, 575 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-26 18:25:57,529 INFO L231 Difference]: Finished difference. Result has 51 places, 39 transitions, 275 flow [2023-08-26 18:25:57,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=275, PETRI_PLACES=51, PETRI_TRANSITIONS=39} [2023-08-26 18:25:57,529 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2023-08-26 18:25:57,529 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 39 transitions, 275 flow [2023-08-26 18:25:57,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.0) internal successors, (490), 5 states have internal predecessors, (490), 0 states have call successors, (0), 0 states 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 18:25:57,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:25:57,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:25:57,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 18:25:57,530 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 18:25:57,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:25:57,530 INFO L85 PathProgramCache]: Analyzing trace with hash 314096858, now seen corresponding path program 1 times [2023-08-26 18:25:57,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:25:57,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647473894] [2023-08-26 18:25:57,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:25:57,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:25:57,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:25:57,673 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 18:25:57,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:25:57,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647473894] [2023-08-26 18:25:57,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647473894] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:25:57,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:25:57,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 18:25:57,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845168581] [2023-08-26 18:25:57,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:25:57,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 18:25:57,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:25:57,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 18:25:57,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-26 18:25:57,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 205 [2023-08-26 18:25:57,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 275 flow. Second operand has 6 states, 6 states have (on average 97.66666666666667) internal successors, (586), 6 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:57,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:25:57,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 205 [2023-08-26 18:25:57,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:25:57,798 INFO L124 PetriNetUnfolderBase]: 438/788 cut-off events. [2023-08-26 18:25:57,798 INFO L125 PetriNetUnfolderBase]: For 2357/2664 co-relation queries the response was YES. [2023-08-26 18:25:57,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3993 conditions, 788 events. 438/788 cut-off events. For 2357/2664 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 4163 event pairs, 16 based on Foata normal form. 92/848 useless extension candidates. Maximal degree in co-relation 3979. Up to 547 conditions per place. [2023-08-26 18:25:57,801 INFO L140 encePairwiseOnDemand]: 198/205 looper letters, 48 selfloop transitions, 13 changer transitions 33/98 dead transitions. [2023-08-26 18:25:57,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 98 transitions, 821 flow [2023-08-26 18:25:57,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 18:25:57,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 18:25:57,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 835 transitions. [2023-08-26 18:25:57,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5091463414634146 [2023-08-26 18:25:57,804 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 835 transitions. [2023-08-26 18:25:57,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 835 transitions. [2023-08-26 18:25:57,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:25:57,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 835 transitions. [2023-08-26 18:25:57,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 104.375) internal successors, (835), 8 states have internal predecessors, (835), 0 states have call successors, (0), 0 states 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 18:25:57,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 205.0) internal successors, (1845), 9 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states 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 18:25:57,808 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 205.0) internal successors, (1845), 9 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states 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 18:25:57,808 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 275 flow. Second operand 8 states and 835 transitions. [2023-08-26 18:25:57,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 98 transitions, 821 flow [2023-08-26 18:25:57,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 98 transitions, 781 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-08-26 18:25:57,814 INFO L231 Difference]: Finished difference. Result has 59 places, 39 transitions, 307 flow [2023-08-26 18:25:57,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=307, PETRI_PLACES=59, PETRI_TRANSITIONS=39} [2023-08-26 18:25:57,815 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2023-08-26 18:25:57,815 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 39 transitions, 307 flow [2023-08-26 18:25:57,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 97.66666666666667) internal successors, (586), 6 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:57,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:25:57,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:25:57,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 18:25:57,815 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 18:25:57,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:25:57,816 INFO L85 PathProgramCache]: Analyzing trace with hash -599798906, now seen corresponding path program 1 times [2023-08-26 18:25:57,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:25:57,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749100506] [2023-08-26 18:25:57,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:25:57,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:25:57,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:25:57,920 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 18:25:57,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:25:57,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749100506] [2023-08-26 18:25:57,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749100506] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:25:57,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:25:57,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 18:25:57,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621676819] [2023-08-26 18:25:57,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:25:57,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:25:57,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:25:57,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:25:57,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:25:57,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 205 [2023-08-26 18:25:57,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 39 transitions, 307 flow. Second operand has 5 states, 5 states have (on average 94.8) internal successors, (474), 5 states have internal predecessors, (474), 0 states have call successors, (0), 0 states 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 18:25:57,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:25:57,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 205 [2023-08-26 18:25:57,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:25:58,014 INFO L124 PetriNetUnfolderBase]: 350/618 cut-off events. [2023-08-26 18:25:58,014 INFO L125 PetriNetUnfolderBase]: For 2470/2470 co-relation queries the response was YES. [2023-08-26 18:25:58,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3023 conditions, 618 events. 350/618 cut-off events. For 2470/2470 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2596 event pairs, 27 based on Foata normal form. 6/624 useless extension candidates. Maximal degree in co-relation 3006. Up to 291 conditions per place. [2023-08-26 18:25:58,017 INFO L140 encePairwiseOnDemand]: 197/205 looper letters, 42 selfloop transitions, 10 changer transitions 36/88 dead transitions. [2023-08-26 18:25:58,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 88 transitions, 872 flow [2023-08-26 18:25:58,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 18:25:58,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 18:25:58,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 598 transitions. [2023-08-26 18:25:58,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861788617886179 [2023-08-26 18:25:58,019 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 598 transitions. [2023-08-26 18:25:58,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 598 transitions. [2023-08-26 18:25:58,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:25:58,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 598 transitions. [2023-08-26 18:25:58,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 99.66666666666667) internal successors, (598), 6 states have internal predecessors, (598), 0 states have call successors, (0), 0 states 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 18:25:58,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 205.0) internal successors, (1435), 7 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states 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 18:25:58,022 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 205.0) internal successors, (1435), 7 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states 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 18:25:58,022 INFO L175 Difference]: Start difference. First operand has 59 places, 39 transitions, 307 flow. Second operand 6 states and 598 transitions. [2023-08-26 18:25:58,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 88 transitions, 872 flow [2023-08-26 18:25:58,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 88 transitions, 680 flow, removed 68 selfloop flow, removed 7 redundant places. [2023-08-26 18:25:58,028 INFO L231 Difference]: Finished difference. Result has 54 places, 37 transitions, 241 flow [2023-08-26 18:25:58,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=54, PETRI_TRANSITIONS=37} [2023-08-26 18:25:58,030 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 13 predicate places. [2023-08-26 18:25:58,030 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 37 transitions, 241 flow [2023-08-26 18:25:58,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.8) internal successors, (474), 5 states have internal predecessors, (474), 0 states have call successors, (0), 0 states 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 18:25:58,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:25:58,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:25:58,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 18:25:58,030 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 18:25:58,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:25:58,031 INFO L85 PathProgramCache]: Analyzing trace with hash 21176976, now seen corresponding path program 1 times [2023-08-26 18:25:58,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:25:58,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425033748] [2023-08-26 18:25:58,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:25:58,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:25:58,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:25:58,118 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 18:25:58,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:25:58,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425033748] [2023-08-26 18:25:58,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425033748] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:25:58,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:25:58,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 18:25:58,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438571696] [2023-08-26 18:25:58,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:25:58,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:25:58,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:25:58,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:25:58,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:25:58,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 205 [2023-08-26 18:25:58,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 37 transitions, 241 flow. Second operand has 5 states, 5 states have (on average 96.6) internal successors, (483), 5 states have internal predecessors, (483), 0 states have call successors, (0), 0 states 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 18:25:58,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:25:58,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 205 [2023-08-26 18:25:58,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:25:58,205 INFO L124 PetriNetUnfolderBase]: 325/602 cut-off events. [2023-08-26 18:25:58,205 INFO L125 PetriNetUnfolderBase]: For 1233/1233 co-relation queries the response was YES. [2023-08-26 18:25:58,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2523 conditions, 602 events. 325/602 cut-off events. For 1233/1233 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2660 event pairs, 65 based on Foata normal form. 1/603 useless extension candidates. Maximal degree in co-relation 2508. Up to 232 conditions per place. [2023-08-26 18:25:58,207 INFO L140 encePairwiseOnDemand]: 199/205 looper letters, 38 selfloop transitions, 6 changer transitions 47/91 dead transitions. [2023-08-26 18:25:58,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 91 transitions, 739 flow [2023-08-26 18:25:58,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 18:25:58,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 18:25:58,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 608 transitions. [2023-08-26 18:25:58,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4943089430894309 [2023-08-26 18:25:58,209 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 608 transitions. [2023-08-26 18:25:58,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 608 transitions. [2023-08-26 18:25:58,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:25:58,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 608 transitions. [2023-08-26 18:25:58,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 101.33333333333333) internal successors, (608), 6 states have internal predecessors, (608), 0 states have call successors, (0), 0 states 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 18:25:58,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 205.0) internal successors, (1435), 7 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states 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 18:25:58,212 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 205.0) internal successors, (1435), 7 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states 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 18:25:58,212 INFO L175 Difference]: Start difference. First operand has 54 places, 37 transitions, 241 flow. Second operand 6 states and 608 transitions. [2023-08-26 18:25:58,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 91 transitions, 739 flow [2023-08-26 18:25:58,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 91 transitions, 723 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-08-26 18:25:58,217 INFO L231 Difference]: Finished difference. Result has 60 places, 35 transitions, 237 flow [2023-08-26 18:25:58,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=237, PETRI_PLACES=60, PETRI_TRANSITIONS=35} [2023-08-26 18:25:58,218 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 19 predicate places. [2023-08-26 18:25:58,218 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 35 transitions, 237 flow [2023-08-26 18:25:58,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 96.6) internal successors, (483), 5 states have internal predecessors, (483), 0 states have call successors, (0), 0 states 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 18:25:58,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:25:58,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:25:58,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 18:25:58,219 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 18:25:58,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:25:58,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1169305538, now seen corresponding path program 2 times [2023-08-26 18:25:58,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:25:58,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733927456] [2023-08-26 18:25:58,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:25:58,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:25:58,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:25:58,337 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 18:25:58,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:25:58,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733927456] [2023-08-26 18:25:58,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733927456] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:25:58,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:25:58,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 18:25:58,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706932679] [2023-08-26 18:25:58,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:25:58,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 18:25:58,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:25:58,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 18:25:58,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-26 18:25:58,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 205 [2023-08-26 18:25:58,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 35 transitions, 237 flow. Second operand has 7 states, 7 states have (on average 97.42857142857143) internal successors, (682), 7 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:58,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:25:58,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 205 [2023-08-26 18:25:58,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:25:58,416 INFO L124 PetriNetUnfolderBase]: 135/281 cut-off events. [2023-08-26 18:25:58,416 INFO L125 PetriNetUnfolderBase]: For 653/740 co-relation queries the response was YES. [2023-08-26 18:25:58,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1141 conditions, 281 events. 135/281 cut-off events. For 653/740 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1175 event pairs, 9 based on Foata normal form. 40/311 useless extension candidates. Maximal degree in co-relation 1124. Up to 97 conditions per place. [2023-08-26 18:25:58,417 INFO L140 encePairwiseOnDemand]: 198/205 looper letters, 0 selfloop transitions, 0 changer transitions 56/56 dead transitions. [2023-08-26 18:25:58,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 56 transitions, 454 flow [2023-08-26 18:25:58,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 18:25:58,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 18:25:58,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 809 transitions. [2023-08-26 18:25:58,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49329268292682926 [2023-08-26 18:25:58,419 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 809 transitions. [2023-08-26 18:25:58,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 809 transitions. [2023-08-26 18:25:58,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:25:58,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 809 transitions. [2023-08-26 18:25:58,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 101.125) internal successors, (809), 8 states have internal predecessors, (809), 0 states have call successors, (0), 0 states 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 18:25:58,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 205.0) internal successors, (1845), 9 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states 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 18:25:58,422 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 205.0) internal successors, (1845), 9 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states 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 18:25:58,422 INFO L175 Difference]: Start difference. First operand has 60 places, 35 transitions, 237 flow. Second operand 8 states and 809 transitions. [2023-08-26 18:25:58,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 56 transitions, 454 flow [2023-08-26 18:25:58,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 56 transitions, 411 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-26 18:25:58,424 INFO L231 Difference]: Finished difference. Result has 56 places, 0 transitions, 0 flow [2023-08-26 18:25:58,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=56, PETRI_TRANSITIONS=0} [2023-08-26 18:25:58,424 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 15 predicate places. [2023-08-26 18:25:58,424 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 0 transitions, 0 flow [2023-08-26 18:25:58,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 97.42857142857143) internal successors, (682), 7 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:25:58,426 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 13 remaining) [2023-08-26 18:25:58,426 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 13 remaining) [2023-08-26 18:25:58,427 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2023-08-26 18:25:58,427 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 13 remaining) [2023-08-26 18:25:58,427 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2023-08-26 18:25:58,427 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2023-08-26 18:25:58,427 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 13 remaining) [2023-08-26 18:25:58,427 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 13 remaining) [2023-08-26 18:25:58,427 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONASSERT (4 of 13 remaining) [2023-08-26 18:25:58,427 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 13 remaining) [2023-08-26 18:25:58,427 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 13 remaining) [2023-08-26 18:25:58,427 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 13 remaining) [2023-08-26 18:25:58,427 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 13 remaining) [2023-08-26 18:25:58,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 18:25:58,428 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:25:58,429 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 18:25:58,429 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 18:25:58,431 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 06:25:58 BasicIcfg [2023-08-26 18:25:58,431 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 18:25:58,431 INFO L158 Benchmark]: Toolchain (without parser) took 7206.63ms. Allocated memory was 348.1MB in the beginning and 503.3MB in the end (delta: 155.2MB). Free memory was 299.6MB in the beginning and 467.6MB in the end (delta: -168.0MB). Peak memory consumption was 281.7MB. Max. memory is 16.0GB. [2023-08-26 18:25:58,432 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 348.1MB. Free memory is still 325.0MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 18:25:58,432 INFO L158 Benchmark]: CACSL2BoogieTranslator took 380.05ms. Allocated memory is still 348.1MB. Free memory was 299.6MB in the beginning and 278.6MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-26 18:25:58,432 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.10ms. Allocated memory is still 348.1MB. Free memory was 278.6MB in the beginning and 276.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 18:25:58,432 INFO L158 Benchmark]: Boogie Preprocessor took 38.36ms. Allocated memory is still 348.1MB. Free memory was 276.5MB in the beginning and 274.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 18:25:58,432 INFO L158 Benchmark]: RCFGBuilder took 438.37ms. Allocated memory is still 348.1MB. Free memory was 274.4MB in the beginning and 256.6MB in the end (delta: 17.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-26 18:25:58,432 INFO L158 Benchmark]: TraceAbstraction took 6299.20ms. Allocated memory was 348.1MB in the beginning and 503.3MB in the end (delta: 155.2MB). Free memory was 256.6MB in the beginning and 467.6MB in the end (delta: -210.9MB). Peak memory consumption was 239.8MB. Max. memory is 16.0GB. [2023-08-26 18:25:58,433 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 348.1MB. Free memory is still 325.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 380.05ms. Allocated memory is still 348.1MB. Free memory was 299.6MB in the beginning and 278.6MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 46.10ms. Allocated memory is still 348.1MB. Free memory was 278.6MB in the beginning and 276.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 38.36ms. Allocated memory is still 348.1MB. Free memory was 276.5MB in the beginning and 274.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 438.37ms. Allocated memory is still 348.1MB. Free memory was 274.4MB in the beginning and 256.6MB in the end (delta: 17.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 6299.20ms. Allocated memory was 348.1MB in the beginning and 503.3MB in the end (delta: 155.2MB). Free memory was 256.6MB in the beginning and 467.6MB in the end (delta: -210.9MB). Peak memory consumption was 239.8MB. 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: 2.3s, 103 PlacesBefore, 41 PlacesAfterwards, 91 TransitionsBefore, 28 TransitionsAfterwards, 1766 CoEnabledTransitionPairs, 5 FixpointIterations, 30 TrivialSequentialCompositions, 59 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 4 ConcurrentYvCompositions, 1 ChoiceCompositions, 94 TotalNumberOfCompositions, 2807 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1501, independent: 1428, independent conditional: 0, independent unconditional: 1428, dependent: 73, dependent conditional: 0, dependent unconditional: 73, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 881, independent: 857, independent conditional: 0, independent unconditional: 857, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1501, independent: 571, independent conditional: 0, independent unconditional: 571, dependent: 49, dependent conditional: 0, dependent unconditional: 49, unknown: 881, unknown conditional: 0, unknown unconditional: 881] , Statistics on independence cache: Total cache size (in pairs): 56, Positive cache size: 46, Positive conditional cache size: 0, Positive unconditional cache size: 46, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 17]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 139 locations, 13 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 6.2s, OverallIterations: 14, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 272 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 272 mSDsluCounter, 23 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 10 mSDsCounter, 27 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 846 IncrementalHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 27 mSolverCounterUnsat, 13 mSDtfsCounter, 846 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=307occurred in iteration=11, InterpolantAutomatonStates: 66, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 186 NumberOfCodeBlocks, 186 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 172 ConstructedInterpolants, 0 QuantifiedInterpolants, 728 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 18:25:58,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...