/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread-wmm/safe016_rmo.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 15:19:34,578 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 15:19:34,636 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 15:19:34,640 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 15:19:34,649 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 15:19:34,673 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 15:19:34,673 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 15:19:34,674 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 15:19:34,674 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 15:19:34,675 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 15:19:34,675 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 15:19:34,675 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 15:19:34,676 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 15:19:34,676 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 15:19:34,677 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 15:19:34,677 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 15:19:34,677 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 15:19:34,678 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 15:19:34,678 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 15:19:34,678 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 15:19:34,679 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 15:19:34,680 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 15:19:34,680 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 15:19:34,680 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 15:19:34,681 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 15:19:34,681 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 15:19:34,682 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 15:19:34,682 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:19:34,682 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 15:19:34,683 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 15:19:34,683 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 15:19:34,683 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 15:19:34,683 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 15:19:34,684 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 15:19:34,684 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 15:19:34,684 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 15:19:35,026 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 15:19:35,054 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 15:19:35,056 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 15:19:35,058 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 15:19:35,058 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 15:19:35,060 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe016_rmo.opt.i [2023-08-26 15:19:36,304 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 15:19:36,556 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 15:19:36,557 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe016_rmo.opt.i [2023-08-26 15:19:36,576 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d1b555d9/e9326a038664443793436180f01397b2/FLAGde915e1f5 [2023-08-26 15:19:36,589 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d1b555d9/e9326a038664443793436180f01397b2 [2023-08-26 15:19:36,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 15:19:36,593 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 15:19:36,594 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 15:19:36,594 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 15:19:36,596 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 15:19:36,596 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:19:36" (1/1) ... [2023-08-26 15:19:36,597 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@118884b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:36, skipping insertion in model container [2023-08-26 15:19:36,597 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:19:36" (1/1) ... [2023-08-26 15:19:36,647 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 15:19:37,044 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:19:37,065 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 15:19:37,091 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 15:19:37,093 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 15:19:37,153 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:19:37,193 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 15:19:37,193 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 15:19:37,200 INFO L206 MainTranslator]: Completed translation [2023-08-26 15:19:37,200 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:37 WrapperNode [2023-08-26 15:19:37,201 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 15:19:37,202 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 15:19:37,202 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 15:19:37,202 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 15:19:37,208 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:37" (1/1) ... [2023-08-26 15:19:37,238 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:37" (1/1) ... [2023-08-26 15:19:37,281 INFO L138 Inliner]: procedures = 177, calls = 90, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 187 [2023-08-26 15:19:37,282 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 15:19:37,282 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 15:19:37,283 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 15:19:37,283 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 15:19:37,291 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:37" (1/1) ... [2023-08-26 15:19:37,291 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:37" (1/1) ... [2023-08-26 15:19:37,306 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:37" (1/1) ... [2023-08-26 15:19:37,306 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:37" (1/1) ... [2023-08-26 15:19:37,315 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:37" (1/1) ... [2023-08-26 15:19:37,330 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:37" (1/1) ... [2023-08-26 15:19:37,333 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:37" (1/1) ... [2023-08-26 15:19:37,335 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:37" (1/1) ... [2023-08-26 15:19:37,338 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 15:19:37,339 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 15:19:37,339 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 15:19:37,339 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 15:19:37,340 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:37" (1/1) ... [2023-08-26 15:19:37,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:19:37,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:19:37,386 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-26 15:19:37,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 15:19:37,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 15:19:37,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 15:19:37,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 15:19:37,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 15:19:37,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 15:19:37,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 15:19:37,429 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-26 15:19:37,429 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-26 15:19:37,429 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-26 15:19:37,429 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-26 15:19:37,429 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-26 15:19:37,429 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-26 15:19:37,429 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-26 15:19:37,430 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-26 15:19:37,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 15:19:37,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 15:19:37,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 15:19:37,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 15:19:37,432 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 15:19:37,609 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 15:19:37,611 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 15:19:38,154 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 15:19:38,665 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 15:19:38,666 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 15:19:38,668 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:19:38 BoogieIcfgContainer [2023-08-26 15:19:38,668 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 15:19:38,671 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 15:19:38,671 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 15:19:38,674 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 15:19:38,674 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:19:36" (1/3) ... [2023-08-26 15:19:38,675 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@121a53b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:19:38, skipping insertion in model container [2023-08-26 15:19:38,675 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:37" (2/3) ... [2023-08-26 15:19:38,676 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@121a53b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:19:38, skipping insertion in model container [2023-08-26 15:19:38,676 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:19:38" (3/3) ... [2023-08-26 15:19:38,677 INFO L112 eAbstractionObserver]: Analyzing ICFG safe016_rmo.opt.i [2023-08-26 15:19:38,693 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 15:19:38,694 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2023-08-26 15:19:38,694 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 15:19:38,877 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 15:19:38,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 216 places, 206 transitions, 432 flow [2023-08-26 15:19:38,974 INFO L124 PetriNetUnfolderBase]: 3/202 cut-off events. [2023-08-26 15:19:38,974 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:19:38,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 202 events. 3/202 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 337 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 144. Up to 2 conditions per place. [2023-08-26 15:19:38,983 INFO L82 GeneralOperation]: Start removeDead. Operand has 216 places, 206 transitions, 432 flow [2023-08-26 15:19:38,992 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 212 places, 202 transitions, 416 flow [2023-08-26 15:19:38,995 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:19:39,006 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 212 places, 202 transitions, 416 flow [2023-08-26 15:19:39,010 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 212 places, 202 transitions, 416 flow [2023-08-26 15:19:39,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 212 places, 202 transitions, 416 flow [2023-08-26 15:19:39,092 INFO L124 PetriNetUnfolderBase]: 3/202 cut-off events. [2023-08-26 15:19:39,092 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:19:39,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 202 events. 3/202 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 335 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 144. Up to 2 conditions per place. [2023-08-26 15:19:39,106 INFO L119 LiptonReduction]: Number of co-enabled transitions 10118 [2023-08-26 15:19:47,682 INFO L134 LiptonReduction]: Checked pairs total: 65446 [2023-08-26 15:19:47,682 INFO L136 LiptonReduction]: Total number of compositions: 151 [2023-08-26 15:19:47,694 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 15:19:47,699 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;@26a025b9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:19:47,700 INFO L358 AbstractCegarLoop]: Starting to check reachability of 95 error locations. [2023-08-26 15:19:47,701 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:19:47,701 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 15:19:47,701 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:19:47,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:19:47,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 15:19:47,702 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 92 more)] === [2023-08-26 15:19:47,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:19:47,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1193, now seen corresponding path program 1 times [2023-08-26 15:19:47,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:19:47,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896539469] [2023-08-26 15:19:47,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:19:47,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:19:47,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:19:47,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:19:47,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:19:47,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896539469] [2023-08-26 15:19:47,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896539469] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:19:47,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:19:47,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 15:19:47,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918626144] [2023-08-26 15:19:47,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:19:47,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 15:19:47,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:19:47,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 15:19:47,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 15:19:47,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 357 [2023-08-26 15:19:47,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 93 transitions, 198 flow. Second operand has 2 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:47,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:19:47,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 357 [2023-08-26 15:19:47,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:20:36,957 INFO L124 PetriNetUnfolderBase]: 384426/495344 cut-off events. [2023-08-26 15:20:36,958 INFO L125 PetriNetUnfolderBase]: For 881/881 co-relation queries the response was YES. [2023-08-26 15:20:37,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 992139 conditions, 495344 events. 384426/495344 cut-off events. For 881/881 co-relation queries the response was YES. Maximal size of possible extension queue 30655. Compared 3615281 event pairs, 384426 based on Foata normal form. 0/195209 useless extension candidates. Maximal degree in co-relation 992127. Up to 495012 conditions per place. [2023-08-26 15:20:39,936 INFO L140 encePairwiseOnDemand]: 328/357 looper letters, 57 selfloop transitions, 0 changer transitions 0/63 dead transitions. [2023-08-26 15:20:39,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 63 transitions, 252 flow [2023-08-26 15:20:39,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 15:20:39,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 15:20:39,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 376 transitions. [2023-08-26 15:20:39,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5266106442577031 [2023-08-26 15:20:39,947 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 376 transitions. [2023-08-26 15:20:39,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 376 transitions. [2023-08-26 15:20:39,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:20:39,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 376 transitions. [2023-08-26 15:20:39,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 188.0) internal successors, (376), 2 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:20:39,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 357.0) internal successors, (1071), 3 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:20:39,959 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 357.0) internal successors, (1071), 3 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:20:39,961 INFO L175 Difference]: Start difference. First operand has 105 places, 93 transitions, 198 flow. Second operand 2 states and 376 transitions. [2023-08-26 15:20:39,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 63 transitions, 252 flow [2023-08-26 15:20:40,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 63 transitions, 248 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 15:20:40,019 INFO L231 Difference]: Finished difference. Result has 73 places, 63 transitions, 134 flow [2023-08-26 15:20:40,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=134, PETRI_PLACES=73, PETRI_TRANSITIONS=63} [2023-08-26 15:20:40,024 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -32 predicate places. [2023-08-26 15:20:40,024 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 63 transitions, 134 flow [2023-08-26 15:20:40,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:20:40,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:20:40,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 15:20:40,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 15:20:40,025 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 92 more)] === [2023-08-26 15:20:40,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:20:40,027 INFO L85 PathProgramCache]: Analyzing trace with hash 36574379, now seen corresponding path program 1 times [2023-08-26 15:20:40,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:20:40,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580323778] [2023-08-26 15:20:40,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:20:40,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:20:40,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:20:40,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:20:40,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:20:40,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580323778] [2023-08-26 15:20:40,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580323778] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:20:40,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:20:40,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:20:40,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052502162] [2023-08-26 15:20:40,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:20:40,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:20:40,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:20:40,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:20:40,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:20:40,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 357 [2023-08-26 15:20:40,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 63 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:20:40,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:20:40,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 357 [2023-08-26 15:20:40,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:20:53,508 INFO L124 PetriNetUnfolderBase]: 113706/148115 cut-off events. [2023-08-26 15:20:53,509 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:20:53,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297035 conditions, 148115 events. 113706/148115 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7271. Compared 932103 event pairs, 113706 based on Foata normal form. 0/80806 useless extension candidates. Maximal degree in co-relation 297032. Up to 148003 conditions per place. [2023-08-26 15:20:54,530 INFO L140 encePairwiseOnDemand]: 342/357 looper letters, 47 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2023-08-26 15:20:54,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 49 transitions, 202 flow [2023-08-26 15:20:54,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:20:54,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:20:54,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 428 transitions. [2023-08-26 15:20:54,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3996265172735761 [2023-08-26 15:20:54,534 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 428 transitions. [2023-08-26 15:20:54,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 428 transitions. [2023-08-26 15:20:54,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:20:54,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 428 transitions. [2023-08-26 15:20:54,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:20:54,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:20:54,539 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:20:54,542 INFO L175 Difference]: Start difference. First operand has 73 places, 63 transitions, 134 flow. Second operand 3 states and 428 transitions. [2023-08-26 15:20:54,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 49 transitions, 202 flow [2023-08-26 15:20:54,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 49 transitions, 202 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 15:20:54,544 INFO L231 Difference]: Finished difference. Result has 61 places, 49 transitions, 108 flow [2023-08-26 15:20:54,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=61, PETRI_TRANSITIONS=49} [2023-08-26 15:20:54,545 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -44 predicate places. [2023-08-26 15:20:54,545 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 49 transitions, 108 flow [2023-08-26 15:20:54,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:20:54,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:20:54,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 15:20:54,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 15:20:54,546 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 92 more)] === [2023-08-26 15:20:54,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:20:54,546 INFO L85 PathProgramCache]: Analyzing trace with hash 36574378, now seen corresponding path program 1 times [2023-08-26 15:20:54,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:20:54,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238740031] [2023-08-26 15:20:54,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:20:54,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:20:54,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:20:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:20:54,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:20:54,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238740031] [2023-08-26 15:20:54,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238740031] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:20:54,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:20:54,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:20:54,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646717962] [2023-08-26 15:20:54,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:20:54,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:20:54,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:20:54,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:20:54,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:20:54,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 357 [2023-08-26 15:20:54,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 49 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:20:54,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:20:54,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 357 [2023-08-26 15:20:54,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:21:00,303 INFO L124 PetriNetUnfolderBase]: 50986/72014 cut-off events. [2023-08-26 15:21:00,303 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:21:00,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143309 conditions, 72014 events. 50986/72014 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4068. Compared 504553 event pairs, 28634 based on Foata normal form. 0/56306 useless extension candidates. Maximal degree in co-relation 143305. Up to 36377 conditions per place. [2023-08-26 15:21:00,653 INFO L140 encePairwiseOnDemand]: 331/357 looper letters, 49 selfloop transitions, 12 changer transitions 0/62 dead transitions. [2023-08-26 15:21:00,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 62 transitions, 256 flow [2023-08-26 15:21:00,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:21:00,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:21:00,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 426 transitions. [2023-08-26 15:21:00,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39775910364145656 [2023-08-26 15:21:00,655 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 426 transitions. [2023-08-26 15:21:00,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 426 transitions. [2023-08-26 15:21:00,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:21:00,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 426 transitions. [2023-08-26 15:21:00,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:00,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:00,659 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:00,659 INFO L175 Difference]: Start difference. First operand has 61 places, 49 transitions, 108 flow. Second operand 3 states and 426 transitions. [2023-08-26 15:21:00,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 62 transitions, 256 flow [2023-08-26 15:21:00,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 62 transitions, 255 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:21:00,661 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 211 flow [2023-08-26 15:21:00,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=211, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2023-08-26 15:21:00,662 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -44 predicate places. [2023-08-26 15:21:00,662 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 211 flow [2023-08-26 15:21:00,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:00,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:21:00,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:21:00,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 15:21:00,663 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 92 more)] === [2023-08-26 15:21:00,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:21:00,663 INFO L85 PathProgramCache]: Analyzing trace with hash 981823837, now seen corresponding path program 1 times [2023-08-26 15:21:00,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:21:00,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552441819] [2023-08-26 15:21:00,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:21:00,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:21:00,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:21:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:21:01,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:21:01,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552441819] [2023-08-26 15:21:01,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552441819] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:21:01,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:21:01,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:21:01,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890960753] [2023-08-26 15:21:01,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:21:01,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:21:01,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:21:01,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:21:01,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:21:01,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 357 [2023-08-26 15:21:01,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 211 flow. Second operand has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:01,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:21:01,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 357 [2023-08-26 15:21:01,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:21:08,190 INFO L124 PetriNetUnfolderBase]: 59549/82736 cut-off events. [2023-08-26 15:21:08,190 INFO L125 PetriNetUnfolderBase]: For 34613/35374 co-relation queries the response was YES. [2023-08-26 15:21:08,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236676 conditions, 82736 events. 59549/82736 cut-off events. For 34613/35374 co-relation queries the response was YES. Maximal size of possible extension queue 3733. Compared 564140 event pairs, 15559 based on Foata normal form. 120/74537 useless extension candidates. Maximal degree in co-relation 236671. Up to 75597 conditions per place. [2023-08-26 15:21:08,646 INFO L140 encePairwiseOnDemand]: 353/357 looper letters, 81 selfloop transitions, 3 changer transitions 0/89 dead transitions. [2023-08-26 15:21:08,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 89 transitions, 505 flow [2023-08-26 15:21:08,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:21:08,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:21:08,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 492 transitions. [2023-08-26 15:21:08,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45938375350140054 [2023-08-26 15:21:08,648 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 492 transitions. [2023-08-26 15:21:08,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 492 transitions. [2023-08-26 15:21:08,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:21:08,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 492 transitions. [2023-08-26 15:21:08,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:08,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:08,652 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:08,652 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 211 flow. Second operand 3 states and 492 transitions. [2023-08-26 15:21:08,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 89 transitions, 505 flow [2023-08-26 15:21:08,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 89 transitions, 465 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:21:08,976 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 206 flow [2023-08-26 15:21:08,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2023-08-26 15:21:08,976 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -43 predicate places. [2023-08-26 15:21:08,977 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 206 flow [2023-08-26 15:21:08,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:08,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:21:08,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:21:08,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 15:21:08,978 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 92 more)] === [2023-08-26 15:21:08,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:21:08,978 INFO L85 PathProgramCache]: Analyzing trace with hash 981823576, now seen corresponding path program 1 times [2023-08-26 15:21:08,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:21:08,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613448766] [2023-08-26 15:21:08,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:21:08,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:21:08,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:21:09,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:21:09,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:21:09,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613448766] [2023-08-26 15:21:09,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613448766] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:21:09,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:21:09,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:21:09,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68722116] [2023-08-26 15:21:09,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:21:09,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:21:09,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:21:09,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:21:09,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:21:09,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2023-08-26 15:21:09,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 206 flow. Second operand has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:09,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:21:09,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2023-08-26 15:21:09,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:21:15,813 INFO L124 PetriNetUnfolderBase]: 55712/78483 cut-off events. [2023-08-26 15:21:15,814 INFO L125 PetriNetUnfolderBase]: For 14343/14758 co-relation queries the response was YES. [2023-08-26 15:21:16,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213540 conditions, 78483 events. 55712/78483 cut-off events. For 14343/14758 co-relation queries the response was YES. Maximal size of possible extension queue 3769. Compared 544628 event pairs, 25228 based on Foata normal form. 0/61049 useless extension candidates. Maximal degree in co-relation 213534. Up to 58031 conditions per place. [2023-08-26 15:21:16,435 INFO L140 encePairwiseOnDemand]: 353/357 looper letters, 81 selfloop transitions, 3 changer transitions 0/91 dead transitions. [2023-08-26 15:21:16,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 91 transitions, 491 flow [2023-08-26 15:21:16,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:21:16,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:21:16,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 501 transitions. [2023-08-26 15:21:16,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4677871148459384 [2023-08-26 15:21:16,437 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 501 transitions. [2023-08-26 15:21:16,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 501 transitions. [2023-08-26 15:21:16,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:21:16,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 501 transitions. [2023-08-26 15:21:16,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:16,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:16,442 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:16,442 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 206 flow. Second operand 3 states and 501 transitions. [2023-08-26 15:21:16,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 91 transitions, 491 flow [2023-08-26 15:21:16,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 91 transitions, 487 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:21:16,447 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 216 flow [2023-08-26 15:21:16,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2023-08-26 15:21:16,449 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -41 predicate places. [2023-08-26 15:21:16,449 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 216 flow [2023-08-26 15:21:16,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:16,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:21:16,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:21:16,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 15:21:16,450 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 92 more)] === [2023-08-26 15:21:16,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:21:16,452 INFO L85 PathProgramCache]: Analyzing trace with hash 371766770, now seen corresponding path program 1 times [2023-08-26 15:21:16,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:21:16,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323994426] [2023-08-26 15:21:16,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:21:16,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:21:16,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:21:16,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:21:16,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:21:16,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323994426] [2023-08-26 15:21:16,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323994426] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:21:16,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:21:16,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:21:16,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778110938] [2023-08-26 15:21:16,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:21:16,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:21:16,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:21:16,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:21:16,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:21:16,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 357 [2023-08-26 15:21:16,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:16,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:21:16,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 357 [2023-08-26 15:21:16,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:21:24,092 INFO L124 PetriNetUnfolderBase]: 62485/89713 cut-off events. [2023-08-26 15:21:24,092 INFO L125 PetriNetUnfolderBase]: For 20875/20875 co-relation queries the response was YES. [2023-08-26 15:21:24,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251135 conditions, 89713 events. 62485/89713 cut-off events. For 20875/20875 co-relation queries the response was YES. Maximal size of possible extension queue 4540. Compared 654283 event pairs, 29488 based on Foata normal form. 0/74981 useless extension candidates. Maximal degree in co-relation 251128. Up to 68769 conditions per place. [2023-08-26 15:21:24,615 INFO L140 encePairwiseOnDemand]: 351/357 looper letters, 73 selfloop transitions, 6 changer transitions 0/81 dead transitions. [2023-08-26 15:21:24,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 81 transitions, 446 flow [2023-08-26 15:21:24,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:21:24,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:21:24,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 416 transitions. [2023-08-26 15:21:24,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.388422035480859 [2023-08-26 15:21:24,617 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 416 transitions. [2023-08-26 15:21:24,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 416 transitions. [2023-08-26 15:21:24,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:21:24,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 416 transitions. [2023-08-26 15:21:24,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:24,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:24,620 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:24,620 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 216 flow. Second operand 3 states and 416 transitions. [2023-08-26 15:21:24,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 81 transitions, 446 flow [2023-08-26 15:21:24,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 81 transitions, 440 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:21:24,632 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 248 flow [2023-08-26 15:21:24,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2023-08-26 15:21:24,632 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -41 predicate places. [2023-08-26 15:21:24,633 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 248 flow [2023-08-26 15:21:24,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:24,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:21:24,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:21:24,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 15:21:24,633 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 92 more)] === [2023-08-26 15:21:24,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:21:24,634 INFO L85 PathProgramCache]: Analyzing trace with hash 371766771, now seen corresponding path program 1 times [2023-08-26 15:21:24,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:21:24,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446244362] [2023-08-26 15:21:24,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:21:24,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:21:24,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:21:24,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:21:24,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:21:24,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446244362] [2023-08-26 15:21:24,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446244362] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:21:24,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:21:24,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:21:24,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542362146] [2023-08-26 15:21:24,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:21:24,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:21:24,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:21:24,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:21:24,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 15:21:24,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 357 [2023-08-26 15:21:24,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 248 flow. Second operand has 4 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:24,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:21:24,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 357 [2023-08-26 15:21:24,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:21:37,184 INFO L124 PetriNetUnfolderBase]: 101472/144800 cut-off events. [2023-08-26 15:21:37,185 INFO L125 PetriNetUnfolderBase]: For 57165/57165 co-relation queries the response was YES. [2023-08-26 15:21:37,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421367 conditions, 144800 events. 101472/144800 cut-off events. For 57165/57165 co-relation queries the response was YES. Maximal size of possible extension queue 7427. Compared 1106941 event pairs, 50740 based on Foata normal form. 300/118692 useless extension candidates. Maximal degree in co-relation 421359. Up to 72692 conditions per place. [2023-08-26 15:21:38,236 INFO L140 encePairwiseOnDemand]: 353/357 looper letters, 98 selfloop transitions, 4 changer transitions 0/104 dead transitions. [2023-08-26 15:21:38,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 104 transitions, 613 flow [2023-08-26 15:21:38,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:21:38,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:21:38,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 562 transitions. [2023-08-26 15:21:38,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39355742296918766 [2023-08-26 15:21:38,239 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 562 transitions. [2023-08-26 15:21:38,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 562 transitions. [2023-08-26 15:21:38,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:21:38,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 562 transitions. [2023-08-26 15:21:38,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 140.5) internal successors, (562), 4 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:38,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 357.0) internal successors, (1785), 5 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:38,244 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 357.0) internal successors, (1785), 5 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:38,244 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 248 flow. Second operand 4 states and 562 transitions. [2023-08-26 15:21:38,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 104 transitions, 613 flow [2023-08-26 15:21:39,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 104 transitions, 606 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:21:39,520 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 259 flow [2023-08-26 15:21:39,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=259, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2023-08-26 15:21:39,521 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -38 predicate places. [2023-08-26 15:21:39,521 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 259 flow [2023-08-26 15:21:39,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:39,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:21:39,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:21:39,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 15:21:39,522 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 92 more)] === [2023-08-26 15:21:39,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:21:39,522 INFO L85 PathProgramCache]: Analyzing trace with hash -811770917, now seen corresponding path program 2 times [2023-08-26 15:21:39,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:21:39,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670086330] [2023-08-26 15:21:39,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:21:39,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:21:39,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:21:39,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:21:39,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:21:39,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670086330] [2023-08-26 15:21:39,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670086330] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:21:39,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:21:39,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:21:39,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141242518] [2023-08-26 15:21:39,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:21:39,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 15:21:39,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:21:39,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 15:21:39,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-26 15:21:39,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 357 [2023-08-26 15:21:39,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 259 flow. Second operand has 5 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:39,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:21:39,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 357 [2023-08-26 15:21:39,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:21:51,738 INFO L124 PetriNetUnfolderBase]: 100607/143635 cut-off events. [2023-08-26 15:21:51,739 INFO L125 PetriNetUnfolderBase]: For 65995/65995 co-relation queries the response was YES. [2023-08-26 15:21:52,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 417385 conditions, 143635 events. 100607/143635 cut-off events. For 65995/65995 co-relation queries the response was YES. Maximal size of possible extension queue 7404. Compared 1098247 event pairs, 42684 based on Foata normal form. 300/117527 useless extension candidates. Maximal degree in co-relation 417376. Up to 125271 conditions per place. [2023-08-26 15:21:52,883 INFO L140 encePairwiseOnDemand]: 354/357 looper letters, 91 selfloop transitions, 3 changer transitions 0/96 dead transitions. [2023-08-26 15:21:52,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 96 transitions, 571 flow [2023-08-26 15:21:52,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:21:52,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:21:52,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 557 transitions. [2023-08-26 15:21:52,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3900560224089636 [2023-08-26 15:21:52,885 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 557 transitions. [2023-08-26 15:21:52,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 557 transitions. [2023-08-26 15:21:52,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:21:52,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 557 transitions. [2023-08-26 15:21:52,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 139.25) internal successors, (557), 4 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:52,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 357.0) internal successors, (1785), 5 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:52,890 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 357.0) internal successors, (1785), 5 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:52,890 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 259 flow. Second operand 4 states and 557 transitions. [2023-08-26 15:21:52,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 96 transitions, 571 flow [2023-08-26 15:21:53,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 96 transitions, 563 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 15:21:53,197 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 251 flow [2023-08-26 15:21:53,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=251, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2023-08-26 15:21:53,198 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -39 predicate places. [2023-08-26 15:21:53,198 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 251 flow [2023-08-26 15:21:53,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:53,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:21:53,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:21:53,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 15:21:53,199 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 92 more)] === [2023-08-26 15:21:53,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:21:53,199 INFO L85 PathProgramCache]: Analyzing trace with hash 371872431, now seen corresponding path program 1 times [2023-08-26 15:21:53,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:21:53,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415980551] [2023-08-26 15:21:53,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:21:53,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:21:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:21:53,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:21:53,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:21:53,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415980551] [2023-08-26 15:21:53,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415980551] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:21:53,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:21:53,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:21:53,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572199814] [2023-08-26 15:21:53,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:21:53,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:21:53,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:21:53,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:21:53,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:21:53,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 357 [2023-08-26 15:21:53,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 251 flow. Second operand has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:53,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:21:53,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 357 [2023-08-26 15:21:53,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:22:06,427 INFO L124 PetriNetUnfolderBase]: 98867/141157 cut-off events. [2023-08-26 15:22:06,427 INFO L125 PetriNetUnfolderBase]: For 71712/73084 co-relation queries the response was YES. [2023-08-26 15:22:06,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 407360 conditions, 141157 events. 98867/141157 cut-off events. For 71712/73084 co-relation queries the response was YES. Maximal size of possible extension queue 7483. Compared 1092777 event pairs, 52770 based on Foata normal form. 132/112886 useless extension candidates. Maximal degree in co-relation 407352. Up to 119782 conditions per place. [2023-08-26 15:22:07,367 INFO L140 encePairwiseOnDemand]: 354/357 looper letters, 97 selfloop transitions, 2 changer transitions 0/106 dead transitions. [2023-08-26 15:22:07,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 106 transitions, 639 flow [2023-08-26 15:22:07,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:22:07,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:22:07,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 500 transitions. [2023-08-26 15:22:07,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4668534080298786 [2023-08-26 15:22:07,368 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 500 transitions. [2023-08-26 15:22:07,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 500 transitions. [2023-08-26 15:22:07,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:22:07,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 500 transitions. [2023-08-26 15:22:07,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:07,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:07,372 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:07,372 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 251 flow. Second operand 3 states and 500 transitions. [2023-08-26 15:22:07,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 106 transitions, 639 flow [2023-08-26 15:22:07,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 106 transitions, 633 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:22:07,628 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 255 flow [2023-08-26 15:22:07,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=255, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2023-08-26 15:22:07,629 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -38 predicate places. [2023-08-26 15:22:07,629 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 255 flow [2023-08-26 15:22:07,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:07,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:22:07,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:22:07,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 15:22:07,630 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 92 more)] === [2023-08-26 15:22:07,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:22:07,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1269661747, now seen corresponding path program 1 times [2023-08-26 15:22:07,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:22:07,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214254474] [2023-08-26 15:22:07,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:22:07,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:22:07,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:22:07,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:22:07,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:22:07,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214254474] [2023-08-26 15:22:07,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214254474] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:22:07,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:22:07,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:22:07,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537130383] [2023-08-26 15:22:07,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:22:07,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:22:07,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:22:07,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:22:07,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 15:22:07,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 357 [2023-08-26 15:22:07,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 255 flow. Second operand has 4 states, 4 states have (on average 143.5) internal successors, (574), 4 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:07,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:22:07,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 357 [2023-08-26 15:22:07,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:22:31,830 INFO L124 PetriNetUnfolderBase]: 187978/266828 cut-off events. [2023-08-26 15:22:31,831 INFO L125 PetriNetUnfolderBase]: For 141851/143398 co-relation queries the response was YES. [2023-08-26 15:22:32,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 785979 conditions, 266828 events. 187978/266828 cut-off events. For 141851/143398 co-relation queries the response was YES. Maximal size of possible extension queue 13531. Compared 2200099 event pairs, 45520 based on Foata normal form. 717/215080 useless extension candidates. Maximal degree in co-relation 785970. Up to 132765 conditions per place. [2023-08-26 15:22:33,512 INFO L140 encePairwiseOnDemand]: 352/357 looper letters, 129 selfloop transitions, 4 changer transitions 0/138 dead transitions. [2023-08-26 15:22:33,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 138 transitions, 858 flow [2023-08-26 15:22:33,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:22:33,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:22:33,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 656 transitions. [2023-08-26 15:22:33,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45938375350140054 [2023-08-26 15:22:33,514 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 656 transitions. [2023-08-26 15:22:33,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 656 transitions. [2023-08-26 15:22:33,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:22:33,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 656 transitions. [2023-08-26 15:22:33,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:33,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 357.0) internal successors, (1785), 5 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:33,518 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 357.0) internal successors, (1785), 5 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:33,518 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 255 flow. Second operand 4 states and 656 transitions. [2023-08-26 15:22:33,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 138 transitions, 858 flow [2023-08-26 15:22:34,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 138 transitions, 852 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:22:34,518 INFO L231 Difference]: Finished difference. Result has 69 places, 62 transitions, 269 flow [2023-08-26 15:22:34,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=269, PETRI_PLACES=69, PETRI_TRANSITIONS=62} [2023-08-26 15:22:34,519 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -36 predicate places. [2023-08-26 15:22:34,519 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 62 transitions, 269 flow [2023-08-26 15:22:34,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 143.5) internal successors, (574), 4 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:34,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:22:34,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:22:34,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 15:22:34,520 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 92 more)] === [2023-08-26 15:22:34,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:22:34,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1360173813, now seen corresponding path program 2 times [2023-08-26 15:22:34,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:22:34,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831559754] [2023-08-26 15:22:34,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:22:34,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:22:34,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:22:34,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:22:34,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:22:34,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831559754] [2023-08-26 15:22:34,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831559754] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:22:34,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:22:34,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:22:34,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247344273] [2023-08-26 15:22:34,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:22:34,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:22:34,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:22:34,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:22:34,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:22:34,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 357 [2023-08-26 15:22:34,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 62 transitions, 269 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:34,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:22:34,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 357 [2023-08-26 15:22:34,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:22:58,123 INFO L124 PetriNetUnfolderBase]: 178565/256437 cut-off events. [2023-08-26 15:22:58,123 INFO L125 PetriNetUnfolderBase]: For 125230/126748 co-relation queries the response was YES. [2023-08-26 15:22:58,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 758248 conditions, 256437 events. 178565/256437 cut-off events. For 125230/126748 co-relation queries the response was YES. Maximal size of possible extension queue 13951. Compared 2143202 event pairs, 85141 based on Foata normal form. 59/203379 useless extension candidates. Maximal degree in co-relation 758238. Up to 216131 conditions per place. [2023-08-26 15:22:59,781 INFO L140 encePairwiseOnDemand]: 354/357 looper letters, 83 selfloop transitions, 3 changer transitions 0/93 dead transitions. [2023-08-26 15:22:59,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 93 transitions, 565 flow [2023-08-26 15:22:59,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:22:59,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:22:59,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 494 transitions. [2023-08-26 15:22:59,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4612511671335201 [2023-08-26 15:22:59,782 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 494 transitions. [2023-08-26 15:22:59,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 494 transitions. [2023-08-26 15:22:59,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:22:59,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 494 transitions. [2023-08-26 15:22:59,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:59,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:59,785 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:59,785 INFO L175 Difference]: Start difference. First operand has 69 places, 62 transitions, 269 flow. Second operand 3 states and 494 transitions. [2023-08-26 15:22:59,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 93 transitions, 565 flow [2023-08-26 15:23:00,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 93 transitions, 558 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:23:00,476 INFO L231 Difference]: Finished difference. Result has 70 places, 62 transitions, 275 flow [2023-08-26 15:23:00,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=275, PETRI_PLACES=70, PETRI_TRANSITIONS=62} [2023-08-26 15:23:00,477 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -35 predicate places. [2023-08-26 15:23:00,477 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 62 transitions, 275 flow [2023-08-26 15:23:00,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:23:00,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:23:00,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:23:00,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 15:23:00,478 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting P2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 92 more)] === [2023-08-26 15:23:00,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:23:00,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1360104250, now seen corresponding path program 1 times [2023-08-26 15:23:00,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:23:00,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545370586] [2023-08-26 15:23:00,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:23:00,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:23:00,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:23:00,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:23:00,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:23:00,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545370586] [2023-08-26 15:23:00,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545370586] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:23:00,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:23:00,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:23:00,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322773716] [2023-08-26 15:23:00,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:23:00,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 15:23:00,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:23:00,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 15:23:00,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 15:23:00,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 357 [2023-08-26 15:23:00,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 62 transitions, 275 flow. Second operand has 5 states, 5 states have (on average 117.2) internal successors, (586), 5 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:23:00,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:23:00,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 357 [2023-08-26 15:23:00,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:23:19,490 INFO L124 PetriNetUnfolderBase]: 143986/207255 cut-off events. [2023-08-26 15:23:19,490 INFO L125 PetriNetUnfolderBase]: For 104498/104530 co-relation queries the response was YES. [2023-08-26 15:23:20,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 621085 conditions, 207255 events. 143986/207255 cut-off events. For 104498/104530 co-relation queries the response was YES. Maximal size of possible extension queue 10877. Compared 1671588 event pairs, 49184 based on Foata normal form. 160/169861 useless extension candidates. Maximal degree in co-relation 621074. Up to 98405 conditions per place. [2023-08-26 15:23:20,795 INFO L140 encePairwiseOnDemand]: 334/357 looper letters, 73 selfloop transitions, 17 changer transitions 0/92 dead transitions. [2023-08-26 15:23:20,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 92 transitions, 583 flow [2023-08-26 15:23:20,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:23:20,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:23:20,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 538 transitions. [2023-08-26 15:23:20,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37675070028011204 [2023-08-26 15:23:20,797 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 538 transitions. [2023-08-26 15:23:20,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 538 transitions. [2023-08-26 15:23:20,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:23:20,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 538 transitions. [2023-08-26 15:23:20,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 134.5) internal successors, (538), 4 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:23:20,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 357.0) internal successors, (1785), 5 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:23:20,801 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 357.0) internal successors, (1785), 5 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:23:20,801 INFO L175 Difference]: Start difference. First operand has 70 places, 62 transitions, 275 flow. Second operand 4 states and 538 transitions. [2023-08-26 15:23:20,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 92 transitions, 583 flow [2023-08-26 15:23:21,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 92 transitions, 573 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:23:21,102 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 404 flow [2023-08-26 15:23:21,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=404, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2023-08-26 15:23:21,103 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, -32 predicate places. [2023-08-26 15:23:21,103 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 404 flow [2023-08-26 15:23:21,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 117.2) internal successors, (586), 5 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:23:21,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:23:21,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:23:21,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 15:23:21,104 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 92 more)] === [2023-08-26 15:23:21,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:23:21,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1524717597, now seen corresponding path program 1 times [2023-08-26 15:23:21,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:23:21,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547635570] [2023-08-26 15:23:21,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:23:21,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:23:21,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:23:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:23:21,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:23:21,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547635570] [2023-08-26 15:23:21,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547635570] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:23:21,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:23:21,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:23:21,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000124512] [2023-08-26 15:23:21,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:23:21,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:23:21,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:23:21,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:23:21,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:23:21,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 357 [2023-08-26 15:23:21,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 404 flow. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:23:21,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:23:21,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 357 [2023-08-26 15:23:21,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:23:54,666 INFO L124 PetriNetUnfolderBase]: 234763/334456 cut-off events. [2023-08-26 15:23:54,666 INFO L125 PetriNetUnfolderBase]: For 420087/422941 co-relation queries the response was YES. [2023-08-26 15:23:56,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1196214 conditions, 334456 events. 234763/334456 cut-off events. For 420087/422941 co-relation queries the response was YES. Maximal size of possible extension queue 18671. Compared 2838056 event pairs, 88107 based on Foata normal form. 714/305100 useless extension candidates. Maximal degree in co-relation 1196202. Up to 170358 conditions per place. [2023-08-26 15:23:58,220 INFO L140 encePairwiseOnDemand]: 354/357 looper letters, 104 selfloop transitions, 3 changer transitions 0/113 dead transitions. [2023-08-26 15:23:58,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 113 transitions, 874 flow [2023-08-26 15:23:58,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:23:58,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:23:58,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 493 transitions. [2023-08-26 15:23:58,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2023-08-26 15:23:58,223 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 493 transitions. [2023-08-26 15:23:58,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 493 transitions. [2023-08-26 15:23:58,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:23:58,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 493 transitions. [2023-08-26 15:23:58,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:23:58,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:23:58,226 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:23:58,226 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 404 flow. Second operand 3 states and 493 transitions. [2023-08-26 15:23:58,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 113 transitions, 874 flow