./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/array-eq-trans.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/mutex-meet/array-eq-trans.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/array-eq-trans.wvr.c ./goblint.2024-05-21_14-57-05.files/mutex-meet/array-eq-trans.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-04 16:23:09,126 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 16:23:09,175 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 16:23:09,182 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 16:23:09,183 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 16:23:09,208 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 16:23:09,208 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 16:23:09,208 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 16:23:09,209 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 16:23:09,212 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 16:23:09,212 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 16:23:09,212 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 16:23:09,213 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 16:23:09,214 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 16:23:09,214 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 16:23:09,214 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 16:23:09,215 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 16:23:09,215 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 16:23:09,215 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 16:23:09,215 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 16:23:09,215 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 16:23:09,216 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 16:23:09,216 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 16:23:09,216 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 16:23:09,216 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 16:23:09,217 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 16:23:09,217 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 16:23:09,217 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 16:23:09,217 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 16:23:09,218 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 16:23:09,218 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 16:23:09,219 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 16:23:09,219 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:23:09,219 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 16:23:09,219 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 16:23:09,219 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 16:23:09,219 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 16:23:09,220 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 16:23:09,220 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 16:23:09,220 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 16:23:09,220 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 16:23:09,220 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 16:23:09,221 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 16:23:09,221 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 16:23:09,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 16:23:09,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 16:23:09,468 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 16:23:09,469 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 16:23:09,470 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 16:23:09,470 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/array-eq-trans.wvr.yml/witness.yml [2024-06-04 16:23:09,577 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 16:23:09,577 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 16:23:09,577 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/array-eq-trans.wvr.c [2024-06-04 16:23:10,533 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 16:23:10,712 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 16:23:10,713 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-trans.wvr.c [2024-06-04 16:23:10,719 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb77a9807/b553f757b1b2409d8c0edaadb5002272/FLAG7fbd3d13a [2024-06-04 16:23:10,734 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb77a9807/b553f757b1b2409d8c0edaadb5002272 [2024-06-04 16:23:10,735 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 16:23:10,736 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 16:23:10,739 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 16:23:10,739 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 16:23:10,744 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 16:23:10,744 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:23:09" (1/2) ... [2024-06-04 16:23:10,745 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7321b7e5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:23:10, skipping insertion in model container [2024-06-04 16:23:10,745 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:23:09" (1/2) ... [2024-06-04 16:23:10,746 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@55c78cc8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:23:10, skipping insertion in model container [2024-06-04 16:23:10,746 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:23:10" (2/2) ... [2024-06-04 16:23:10,747 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7321b7e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:23:10, skipping insertion in model container [2024-06-04 16:23:10,747 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:23:10" (2/2) ... [2024-06-04 16:23:10,748 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 16:23:10,769 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 16:23:10,770 INFO L97 edCorrectnessWitness]: Location invariant before [L94-L94] ((! multithreaded || 0 <= i_BC) && (! multithreaded || 0 <= i_AB)) && (! multithreaded || 0 <= i_AC) [2024-06-04 16:23:10,770 INFO L97 edCorrectnessWitness]: Location invariant before [L93-L93] ((! multithreaded || 0 <= i_BC) && (! multithreaded || 0 <= i_AB)) && (! multithreaded || 0 <= i_AC) [2024-06-04 16:23:10,770 INFO L97 edCorrectnessWitness]: Location invariant before [L95-L95] ((! multithreaded || 0 <= i_BC) && (! multithreaded || 0 <= i_AB)) && (! multithreaded || 0 <= i_AC) [2024-06-04 16:23:10,770 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 16:23:10,771 INFO L106 edCorrectnessWitness]: ghost_update [L92-L92] multithreaded = 1; [2024-06-04 16:23:10,790 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 16:23:10,956 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:23:10,968 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 16:23:11,035 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:23:11,088 INFO L206 MainTranslator]: Completed translation [2024-06-04 16:23:11,091 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:23:11 WrapperNode [2024-06-04 16:23:11,108 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 16:23:11,109 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 16:23:11,110 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 16:23:11,110 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 16:23:11,115 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:23:11" (1/1) ... [2024-06-04 16:23:11,123 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:23:11" (1/1) ... [2024-06-04 16:23:11,142 INFO L138 Inliner]: procedures = 23, calls = 32, calls flagged for inlining = 11, calls inlined = 15, statements flattened = 202 [2024-06-04 16:23:11,143 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 16:23:11,143 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 16:23:11,143 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 16:23:11,144 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 16:23:11,152 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:23:11" (1/1) ... [2024-06-04 16:23:11,154 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:23:11" (1/1) ... [2024-06-04 16:23:11,157 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:23:11" (1/1) ... [2024-06-04 16:23:11,176 INFO L175 MemorySlicer]: Split 17 memory accesses to 2 slices as follows [2, 15]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-06-04 16:23:11,181 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:23:11" (1/1) ... [2024-06-04 16:23:11,182 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:23:11" (1/1) ... [2024-06-04 16:23:11,188 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:23:11" (1/1) ... [2024-06-04 16:23:11,191 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:23:11" (1/1) ... [2024-06-04 16:23:11,192 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:23:11" (1/1) ... [2024-06-04 16:23:11,193 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:23:11" (1/1) ... [2024-06-04 16:23:11,195 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 16:23:11,196 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 16:23:11,196 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 16:23:11,196 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 16:23:11,197 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:23:11" (1/1) ... [2024-06-04 16:23:11,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:23:11,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 16:23:11,218 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-04 16:23:11,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-04 16:23:11,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 16:23:11,244 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-04 16:23:11,244 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-04 16:23:11,244 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-04 16:23:11,244 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-04 16:23:11,245 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-06-04 16:23:11,245 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-06-04 16:23:11,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 16:23:11,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-04 16:23:11,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-04 16:23:11,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-04 16:23:11,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-04 16:23:11,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 16:23:11,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 16:23:11,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-04 16:23:11,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-04 16:23:11,248 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 16:23:11,329 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 16:23:11,331 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 16:23:11,633 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 16:23:11,634 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 16:23:11,881 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 16:23:11,881 INFO L320 CfgBuilder]: Removed 6 assume(true) statements. [2024-06-04 16:23:11,881 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:23:11 BoogieIcfgContainer [2024-06-04 16:23:11,882 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 16:23:11,883 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 16:23:11,883 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 16:23:11,886 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 16:23:11,886 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:23:09" (1/4) ... [2024-06-04 16:23:11,886 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@559ff80f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 04:23:11, skipping insertion in model container [2024-06-04 16:23:11,886 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 04:23:10" (2/4) ... [2024-06-04 16:23:11,887 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@559ff80f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 04:23:11, skipping insertion in model container [2024-06-04 16:23:11,887 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:23:11" (3/4) ... [2024-06-04 16:23:11,887 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@559ff80f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 04:23:11, skipping insertion in model container [2024-06-04 16:23:11,887 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:23:11" (4/4) ... [2024-06-04 16:23:11,888 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-trans.wvr.c [2024-06-04 16:23:11,900 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 16:23:11,900 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 16:23:11,901 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 16:23:11,936 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-06-04 16:23:11,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 46 transitions, 113 flow [2024-06-04 16:23:11,984 INFO L124 PetriNetUnfolderBase]: 9/43 cut-off events. [2024-06-04 16:23:11,984 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-04 16:23:11,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 43 events. 9/43 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 51 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2024-06-04 16:23:11,987 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 46 transitions, 113 flow [2024-06-04 16:23:11,991 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 41 transitions, 97 flow [2024-06-04 16:23:12,000 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 16:23:12,005 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=LoopHeads, 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;@5de023ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 16:23:12,005 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 16:23:12,013 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 16:23:12,013 INFO L124 PetriNetUnfolderBase]: 5/16 cut-off events. [2024-06-04 16:23:12,013 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 16:23:12,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:23:12,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:23:12,014 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:23:12,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:23:12,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1085890682, now seen corresponding path program 1 times [2024-06-04 16:23:12,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:23:12,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035653586] [2024-06-04 16:23:12,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:23:12,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:23:12,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:23:12,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:23:12,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:23:12,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035653586] [2024-06-04 16:23:12,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035653586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:23:12,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:23:12,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 16:23:12,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522242993] [2024-06-04 16:23:12,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:23:12,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 16:23:12,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:23:12,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 16:23:12,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 16:23:12,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 46 [2024-06-04 16:23:12,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:12,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:23:12,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 46 [2024-06-04 16:23:12,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:23:12,737 INFO L124 PetriNetUnfolderBase]: 2394/3191 cut-off events. [2024-06-04 16:23:12,738 INFO L125 PetriNetUnfolderBase]: For 137/137 co-relation queries the response was YES. [2024-06-04 16:23:12,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6466 conditions, 3191 events. 2394/3191 cut-off events. For 137/137 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 13675 event pairs, 431 based on Foata normal form. 64/2140 useless extension candidates. Maximal degree in co-relation 6045. Up to 2441 conditions per place. [2024-06-04 16:23:12,759 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 53 selfloop transitions, 4 changer transitions 4/65 dead transitions. [2024-06-04 16:23:12,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 65 transitions, 279 flow [2024-06-04 16:23:12,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 16:23:12,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 16:23:12,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-06-04 16:23:12,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6159420289855072 [2024-06-04 16:23:12,771 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 97 flow. Second operand 3 states and 85 transitions. [2024-06-04 16:23:12,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 65 transitions, 279 flow [2024-06-04 16:23:12,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 65 transitions, 263 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-04 16:23:12,780 INFO L231 Difference]: Finished difference. Result has 40 places, 42 transitions, 112 flow [2024-06-04 16:23:12,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=40, PETRI_TRANSITIONS=42} [2024-06-04 16:23:12,784 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -2 predicate places. [2024-06-04 16:23:12,784 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 42 transitions, 112 flow [2024-06-04 16:23:12,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:12,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:23:12,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:23:12,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 16:23:12,785 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:23:12,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:23:12,786 INFO L85 PathProgramCache]: Analyzing trace with hash -67120466, now seen corresponding path program 1 times [2024-06-04 16:23:12,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:23:12,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141156216] [2024-06-04 16:23:12,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:23:12,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:23:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:23:12,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:23:12,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:23:12,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141156216] [2024-06-04 16:23:12,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141156216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:23:12,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:23:12,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 16:23:12,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686904551] [2024-06-04 16:23:12,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:23:12,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 16:23:12,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:23:12,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 16:23:12,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-04 16:23:12,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 46 [2024-06-04 16:23:12,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 42 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:12,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:23:12,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 46 [2024-06-04 16:23:12,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:23:13,229 INFO L124 PetriNetUnfolderBase]: 2692/3583 cut-off events. [2024-06-04 16:23:13,230 INFO L125 PetriNetUnfolderBase]: For 383/383 co-relation queries the response was YES. [2024-06-04 16:23:13,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7982 conditions, 3583 events. 2692/3583 cut-off events. For 383/383 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 15740 event pairs, 401 based on Foata normal form. 84/2952 useless extension candidates. Maximal degree in co-relation 1796. Up to 2179 conditions per place. [2024-06-04 16:23:13,248 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 69 selfloop transitions, 6 changer transitions 0/79 dead transitions. [2024-06-04 16:23:13,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 79 transitions, 345 flow [2024-06-04 16:23:13,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:23:13,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:23:13,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-06-04 16:23:13,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5760869565217391 [2024-06-04 16:23:13,250 INFO L175 Difference]: Start difference. First operand has 40 places, 42 transitions, 112 flow. Second operand 4 states and 106 transitions. [2024-06-04 16:23:13,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 79 transitions, 345 flow [2024-06-04 16:23:13,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 79 transitions, 341 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 16:23:13,253 INFO L231 Difference]: Finished difference. Result has 40 places, 43 transitions, 135 flow [2024-06-04 16:23:13,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=135, PETRI_PLACES=40, PETRI_TRANSITIONS=43} [2024-06-04 16:23:13,254 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -2 predicate places. [2024-06-04 16:23:13,256 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 43 transitions, 135 flow [2024-06-04 16:23:13,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:13,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:23:13,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:23:13,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 16:23:13,261 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:23:13,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:23:13,267 INFO L85 PathProgramCache]: Analyzing trace with hash -384864891, now seen corresponding path program 1 times [2024-06-04 16:23:13,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:23:13,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554765473] [2024-06-04 16:23:13,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:23:13,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:23:13,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:23:13,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:23:13,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:23:13,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554765473] [2024-06-04 16:23:13,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554765473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:23:13,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:23:13,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 16:23:13,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376972640] [2024-06-04 16:23:13,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:23:13,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 16:23:13,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:23:13,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 16:23:13,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-04 16:23:13,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 46 [2024-06-04 16:23:13,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 43 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:13,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:23:13,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 46 [2024-06-04 16:23:13,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:23:13,689 INFO L124 PetriNetUnfolderBase]: 3117/4156 cut-off events. [2024-06-04 16:23:13,690 INFO L125 PetriNetUnfolderBase]: For 1487/1487 co-relation queries the response was YES. [2024-06-04 16:23:13,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9782 conditions, 4156 events. 3117/4156 cut-off events. For 1487/1487 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 18551 event pairs, 505 based on Foata normal form. 80/3448 useless extension candidates. Maximal degree in co-relation 4004. Up to 2782 conditions per place. [2024-06-04 16:23:13,706 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 71 selfloop transitions, 6 changer transitions 0/81 dead transitions. [2024-06-04 16:23:13,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 81 transitions, 380 flow [2024-06-04 16:23:13,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:23:13,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:23:13,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-04 16:23:13,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5706521739130435 [2024-06-04 16:23:13,710 INFO L175 Difference]: Start difference. First operand has 40 places, 43 transitions, 135 flow. Second operand 4 states and 105 transitions. [2024-06-04 16:23:13,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 81 transitions, 380 flow [2024-06-04 16:23:13,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 81 transitions, 371 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-04 16:23:13,714 INFO L231 Difference]: Finished difference. Result has 42 places, 45 transitions, 159 flow [2024-06-04 16:23:13,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=42, PETRI_TRANSITIONS=45} [2024-06-04 16:23:13,715 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-04 16:23:13,715 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 45 transitions, 159 flow [2024-06-04 16:23:13,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:13,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:23:13,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:23:13,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 16:23:13,716 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:23:13,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:23:13,717 INFO L85 PathProgramCache]: Analyzing trace with hash 666047791, now seen corresponding path program 1 times [2024-06-04 16:23:13,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:23:13,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598115917] [2024-06-04 16:23:13,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:23:13,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:23:13,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:23:13,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:23:13,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:23:13,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598115917] [2024-06-04 16:23:13,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598115917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:23:13,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:23:13,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:23:13,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472048262] [2024-06-04 16:23:13,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:23:13,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 16:23:13,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:23:13,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 16:23:13,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-04 16:23:13,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-04 16:23:13,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 45 transitions, 159 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:13,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:23:13,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-04 16:23:13,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:23:14,161 INFO L124 PetriNetUnfolderBase]: 3998/5718 cut-off events. [2024-06-04 16:23:14,162 INFO L125 PetriNetUnfolderBase]: For 2772/2891 co-relation queries the response was YES. [2024-06-04 16:23:14,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13589 conditions, 5718 events. 3998/5718 cut-off events. For 2772/2891 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 30102 event pairs, 2268 based on Foata normal form. 0/4755 useless extension candidates. Maximal degree in co-relation 7357. Up to 3830 conditions per place. [2024-06-04 16:23:14,187 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 67 selfloop transitions, 7 changer transitions 0/80 dead transitions. [2024-06-04 16:23:14,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 80 transitions, 407 flow [2024-06-04 16:23:14,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:23:14,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:23:14,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-04 16:23:14,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-04 16:23:14,190 INFO L175 Difference]: Start difference. First operand has 42 places, 45 transitions, 159 flow. Second operand 5 states and 115 transitions. [2024-06-04 16:23:14,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 80 transitions, 407 flow [2024-06-04 16:23:14,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 80 transitions, 394 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-04 16:23:14,197 INFO L231 Difference]: Finished difference. Result has 47 places, 51 transitions, 202 flow [2024-06-04 16:23:14,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=202, PETRI_PLACES=47, PETRI_TRANSITIONS=51} [2024-06-04 16:23:14,198 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2024-06-04 16:23:14,198 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 51 transitions, 202 flow [2024-06-04 16:23:14,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:14,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:23:14,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:23:14,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 16:23:14,199 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:23:14,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:23:14,200 INFO L85 PathProgramCache]: Analyzing trace with hash 94939195, now seen corresponding path program 1 times [2024-06-04 16:23:14,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:23:14,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962361364] [2024-06-04 16:23:14,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:23:14,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:23:14,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:23:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:23:14,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:23:14,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962361364] [2024-06-04 16:23:14,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962361364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:23:14,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:23:14,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 16:23:14,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761230954] [2024-06-04 16:23:14,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:23:14,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 16:23:14,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:23:14,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 16:23:14,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-04 16:23:14,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 46 [2024-06-04 16:23:14,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 51 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:14,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:23:14,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 46 [2024-06-04 16:23:14,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:23:14,740 INFO L124 PetriNetUnfolderBase]: 4799/6527 cut-off events. [2024-06-04 16:23:14,740 INFO L125 PetriNetUnfolderBase]: For 3580/3580 co-relation queries the response was YES. [2024-06-04 16:23:14,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16041 conditions, 6527 events. 4799/6527 cut-off events. For 3580/3580 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 31773 event pairs, 1032 based on Foata normal form. 112/5852 useless extension candidates. Maximal degree in co-relation 11544. Up to 4489 conditions per place. [2024-06-04 16:23:14,769 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 76 selfloop transitions, 6 changer transitions 0/86 dead transitions. [2024-06-04 16:23:14,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 86 transitions, 457 flow [2024-06-04 16:23:14,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:23:14,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:23:14,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-04 16:23:14,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5489130434782609 [2024-06-04 16:23:14,771 INFO L175 Difference]: Start difference. First operand has 47 places, 51 transitions, 202 flow. Second operand 4 states and 101 transitions. [2024-06-04 16:23:14,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 86 transitions, 457 flow [2024-06-04 16:23:14,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 86 transitions, 453 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-04 16:23:14,775 INFO L231 Difference]: Finished difference. Result has 50 places, 53 transitions, 231 flow [2024-06-04 16:23:14,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=231, PETRI_PLACES=50, PETRI_TRANSITIONS=53} [2024-06-04 16:23:14,776 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-04 16:23:14,776 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 53 transitions, 231 flow [2024-06-04 16:23:14,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:14,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:23:14,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:23:14,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 16:23:14,777 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:23:14,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:23:14,777 INFO L85 PathProgramCache]: Analyzing trace with hash -733507139, now seen corresponding path program 1 times [2024-06-04 16:23:14,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:23:14,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188446991] [2024-06-04 16:23:14,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:23:14,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:23:14,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:23:14,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-04 16:23:14,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:23:14,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188446991] [2024-06-04 16:23:14,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188446991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:23:14,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:23:14,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:23:14,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353982424] [2024-06-04 16:23:14,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:23:14,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:23:14,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:23:14,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:23:14,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:23:14,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-04 16:23:14,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 53 transitions, 231 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:14,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:23:14,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-04 16:23:14,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:23:15,521 INFO L124 PetriNetUnfolderBase]: 7493/10714 cut-off events. [2024-06-04 16:23:15,522 INFO L125 PetriNetUnfolderBase]: For 7436/7698 co-relation queries the response was YES. [2024-06-04 16:23:15,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26877 conditions, 10714 events. 7493/10714 cut-off events. For 7436/7698 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 60731 event pairs, 4023 based on Foata normal form. 167/9571 useless extension candidates. Maximal degree in co-relation 17794. Up to 4355 conditions per place. [2024-06-04 16:23:15,562 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 89 selfloop transitions, 14 changer transitions 0/109 dead transitions. [2024-06-04 16:23:15,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 109 transitions, 632 flow [2024-06-04 16:23:15,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:23:15,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:23:15,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-04 16:23:15,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5181159420289855 [2024-06-04 16:23:15,564 INFO L175 Difference]: Start difference. First operand has 50 places, 53 transitions, 231 flow. Second operand 6 states and 143 transitions. [2024-06-04 16:23:15,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 109 transitions, 632 flow [2024-06-04 16:23:15,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 109 transitions, 619 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-04 16:23:15,573 INFO L231 Difference]: Finished difference. Result has 57 places, 60 transitions, 325 flow [2024-06-04 16:23:15,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=325, PETRI_PLACES=57, PETRI_TRANSITIONS=60} [2024-06-04 16:23:15,574 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 15 predicate places. [2024-06-04 16:23:15,574 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 60 transitions, 325 flow [2024-06-04 16:23:15,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:15,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:23:15,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:23:15,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 16:23:15,575 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:23:15,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:23:15,576 INFO L85 PathProgramCache]: Analyzing trace with hash 539510032, now seen corresponding path program 1 times [2024-06-04 16:23:15,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:23:15,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131717723] [2024-06-04 16:23:15,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:23:15,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:23:15,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:23:15,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-04 16:23:15,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:23:15,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131717723] [2024-06-04 16:23:15,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131717723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:23:15,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:23:15,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:23:15,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620631143] [2024-06-04 16:23:15,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:23:15,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:23:15,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:23:15,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:23:15,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:23:15,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-04 16:23:15,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 60 transitions, 325 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:15,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:23:15,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-04 16:23:15,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:23:16,579 INFO L124 PetriNetUnfolderBase]: 10214/14737 cut-off events. [2024-06-04 16:23:16,579 INFO L125 PetriNetUnfolderBase]: For 10725/11071 co-relation queries the response was YES. [2024-06-04 16:23:16,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37566 conditions, 14737 events. 10214/14737 cut-off events. For 10725/11071 co-relation queries the response was YES. Maximal size of possible extension queue 748. Compared 89586 event pairs, 4608 based on Foata normal form. 0/13177 useless extension candidates. Maximal degree in co-relation 26266. Up to 5789 conditions per place. [2024-06-04 16:23:16,640 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 85 selfloop transitions, 13 changer transitions 3/107 dead transitions. [2024-06-04 16:23:16,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 107 transitions, 701 flow [2024-06-04 16:23:16,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:23:16,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:23:16,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-04 16:23:16,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5478260869565217 [2024-06-04 16:23:16,641 INFO L175 Difference]: Start difference. First operand has 57 places, 60 transitions, 325 flow. Second operand 5 states and 126 transitions. [2024-06-04 16:23:16,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 107 transitions, 701 flow [2024-06-04 16:23:16,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 107 transitions, 684 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-04 16:23:16,655 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 359 flow [2024-06-04 16:23:16,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=359, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2024-06-04 16:23:16,656 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-04 16:23:16,656 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 359 flow [2024-06-04 16:23:16,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:16,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:23:16,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:23:16,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 16:23:16,657 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:23:16,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:23:16,658 INFO L85 PathProgramCache]: Analyzing trace with hash -693800039, now seen corresponding path program 1 times [2024-06-04 16:23:16,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:23:16,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795744032] [2024-06-04 16:23:16,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:23:16,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:23:16,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:23:16,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-04 16:23:16,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:23:16,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795744032] [2024-06-04 16:23:16,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795744032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:23:16,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:23:16,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:23:16,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912063838] [2024-06-04 16:23:16,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:23:16,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:23:16,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:23:16,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:23:16,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:23:16,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 46 [2024-06-04 16:23:16,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 359 flow. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:16,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:23:16,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 46 [2024-06-04 16:23:16,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:23:17,742 INFO L124 PetriNetUnfolderBase]: 10234/14152 cut-off events. [2024-06-04 16:23:17,742 INFO L125 PetriNetUnfolderBase]: For 15715/15715 co-relation queries the response was YES. [2024-06-04 16:23:17,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39103 conditions, 14152 events. 10234/14152 cut-off events. For 15715/15715 co-relation queries the response was YES. Maximal size of possible extension queue 705. Compared 79387 event pairs, 2153 based on Foata normal form. 80/13444 useless extension candidates. Maximal degree in co-relation 29165. Up to 9619 conditions per place. [2024-06-04 16:23:17,810 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 98 selfloop transitions, 7 changer transitions 6/115 dead transitions. [2024-06-04 16:23:17,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 115 transitions, 746 flow [2024-06-04 16:23:17,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:23:17,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:23:17,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-04 16:23:17,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5695652173913044 [2024-06-04 16:23:17,812 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 359 flow. Second operand 5 states and 131 transitions. [2024-06-04 16:23:17,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 115 transitions, 746 flow [2024-06-04 16:23:17,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 115 transitions, 733 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-04 16:23:17,833 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 376 flow [2024-06-04 16:23:17,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=376, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2024-06-04 16:23:17,835 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-04 16:23:17,836 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 376 flow [2024-06-04 16:23:17,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:17,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:23:17,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:23:17,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 16:23:17,836 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:23:17,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:23:17,837 INFO L85 PathProgramCache]: Analyzing trace with hash -693793529, now seen corresponding path program 2 times [2024-06-04 16:23:17,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:23:17,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125932108] [2024-06-04 16:23:17,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:23:17,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:23:17,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:23:17,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-04 16:23:17,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:23:17,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125932108] [2024-06-04 16:23:17,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125932108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:23:17,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:23:17,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:23:17,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324238972] [2024-06-04 16:23:17,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:23:17,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:23:17,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:23:17,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:23:17,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:23:17,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 46 [2024-06-04 16:23:17,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 376 flow. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:17,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:23:17,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 46 [2024-06-04 16:23:17,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:23:18,795 INFO L124 PetriNetUnfolderBase]: 10410/14392 cut-off events. [2024-06-04 16:23:18,795 INFO L125 PetriNetUnfolderBase]: For 20819/20819 co-relation queries the response was YES. [2024-06-04 16:23:18,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40746 conditions, 14392 events. 10410/14392 cut-off events. For 20819/20819 co-relation queries the response was YES. Maximal size of possible extension queue 700. Compared 80118 event pairs, 2141 based on Foata normal form. 80/13700 useless extension candidates. Maximal degree in co-relation 30595. Up to 8987 conditions per place. [2024-06-04 16:23:18,871 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 95 selfloop transitions, 7 changer transitions 9/115 dead transitions. [2024-06-04 16:23:18,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 115 transitions, 755 flow [2024-06-04 16:23:18,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:23:18,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:23:18,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-04 16:23:18,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5652173913043478 [2024-06-04 16:23:18,873 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 376 flow. Second operand 5 states and 130 transitions. [2024-06-04 16:23:18,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 115 transitions, 755 flow [2024-06-04 16:23:18,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 115 transitions, 743 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 16:23:18,915 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 384 flow [2024-06-04 16:23:18,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=384, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2024-06-04 16:23:18,916 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2024-06-04 16:23:18,916 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 384 flow [2024-06-04 16:23:18,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:18,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:23:18,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:23:18,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 16:23:18,917 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:23:18,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:23:18,917 INFO L85 PathProgramCache]: Analyzing trace with hash 2125503345, now seen corresponding path program 1 times [2024-06-04 16:23:18,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:23:18,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297970670] [2024-06-04 16:23:18,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:23:18,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:23:18,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:23:19,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-04 16:23:19,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:23:19,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297970670] [2024-06-04 16:23:19,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297970670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:23:19,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:23:19,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:23:19,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14961550] [2024-06-04 16:23:19,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:23:19,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 16:23:19,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:23:19,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 16:23:19,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-04 16:23:19,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-04 16:23:19,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 384 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:19,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:23:19,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-04 16:23:19,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:23:19,680 INFO L124 PetriNetUnfolderBase]: 8324/12002 cut-off events. [2024-06-04 16:23:19,680 INFO L125 PetriNetUnfolderBase]: For 17878/18142 co-relation queries the response was YES. [2024-06-04 16:23:19,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33694 conditions, 12002 events. 8324/12002 cut-off events. For 17878/18142 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 70007 event pairs, 5333 based on Foata normal form. 0/11425 useless extension candidates. Maximal degree in co-relation 30118. Up to 10025 conditions per place. [2024-06-04 16:23:19,725 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 49 selfloop transitions, 2 changer transitions 29/85 dead transitions. [2024-06-04 16:23:19,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 85 transitions, 634 flow [2024-06-04 16:23:19,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:23:19,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:23:19,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2024-06-04 16:23:19,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4826086956521739 [2024-06-04 16:23:19,727 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 384 flow. Second operand 5 states and 111 transitions. [2024-06-04 16:23:19,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 85 transitions, 634 flow [2024-06-04 16:23:19,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 85 transitions, 618 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-04 16:23:19,747 INFO L231 Difference]: Finished difference. Result has 70 places, 56 transitions, 326 flow [2024-06-04 16:23:19,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=65, 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=5, PETRI_FLOW=326, PETRI_PLACES=70, PETRI_TRANSITIONS=56} [2024-06-04 16:23:19,748 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-04 16:23:19,748 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 56 transitions, 326 flow [2024-06-04 16:23:19,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:19,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:23:19,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:23:19,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 16:23:19,749 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:23:19,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:23:19,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1710724615, now seen corresponding path program 1 times [2024-06-04 16:23:19,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:23:19,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306475594] [2024-06-04 16:23:19,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:23:19,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:23:19,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:23:19,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-04 16:23:19,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:23:19,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306475594] [2024-06-04 16:23:19,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306475594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:23:19,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:23:19,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:23:19,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639520157] [2024-06-04 16:23:19,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:23:19,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:23:19,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:23:19,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:23:19,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:23:19,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-04 16:23:19,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 56 transitions, 326 flow. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:19,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:23:19,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-04 16:23:19,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:23:20,311 INFO L124 PetriNetUnfolderBase]: 6473/9088 cut-off events. [2024-06-04 16:23:20,311 INFO L125 PetriNetUnfolderBase]: For 13674/13906 co-relation queries the response was YES. [2024-06-04 16:23:20,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26454 conditions, 9088 events. 6473/9088 cut-off events. For 13674/13906 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 48103 event pairs, 2696 based on Foata normal form. 57/9065 useless extension candidates. Maximal degree in co-relation 26424. Up to 4419 conditions per place. [2024-06-04 16:23:20,351 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 60 selfloop transitions, 7 changer transitions 24/96 dead transitions. [2024-06-04 16:23:20,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 96 transitions, 644 flow [2024-06-04 16:23:20,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:23:20,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:23:20,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-04 16:23:20,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4927536231884058 [2024-06-04 16:23:20,352 INFO L175 Difference]: Start difference. First operand has 70 places, 56 transitions, 326 flow. Second operand 6 states and 136 transitions. [2024-06-04 16:23:20,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 96 transitions, 644 flow [2024-06-04 16:23:20,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 96 transitions, 620 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 16:23:20,382 INFO L231 Difference]: Finished difference. Result has 68 places, 54 transitions, 306 flow [2024-06-04 16:23:20,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=306, PETRI_PLACES=68, PETRI_TRANSITIONS=54} [2024-06-04 16:23:20,383 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2024-06-04 16:23:20,383 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 54 transitions, 306 flow [2024-06-04 16:23:20,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:20,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:23:20,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:23:20,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 16:23:20,384 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:23:20,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:23:20,384 INFO L85 PathProgramCache]: Analyzing trace with hash -403263208, now seen corresponding path program 1 times [2024-06-04 16:23:20,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:23:20,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101040206] [2024-06-04 16:23:20,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:23:20,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:23:20,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:23:20,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-04 16:23:20,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:23:20,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101040206] [2024-06-04 16:23:20,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101040206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:23:20,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:23:20,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:23:20,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296387076] [2024-06-04 16:23:20,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:23:20,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:23:20,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:23:20,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:23:20,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:23:20,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-06-04 16:23:20,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 54 transitions, 306 flow. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:20,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:23:20,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-06-04 16:23:20,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:23:20,868 INFO L124 PetriNetUnfolderBase]: 5351/7493 cut-off events. [2024-06-04 16:23:20,868 INFO L125 PetriNetUnfolderBase]: For 12440/12632 co-relation queries the response was YES. [2024-06-04 16:23:20,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21812 conditions, 7493 events. 5351/7493 cut-off events. For 12440/12632 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 37919 event pairs, 2105 based on Foata normal form. 0/7132 useless extension candidates. Maximal degree in co-relation 21775. Up to 3466 conditions per place. [2024-06-04 16:23:20,896 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 52 selfloop transitions, 8 changer transitions 24/89 dead transitions. [2024-06-04 16:23:20,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 89 transitions, 586 flow [2024-06-04 16:23:20,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:23:20,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:23:20,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-04 16:23:20,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2024-06-04 16:23:20,904 INFO L175 Difference]: Start difference. First operand has 68 places, 54 transitions, 306 flow. Second operand 5 states and 120 transitions. [2024-06-04 16:23:20,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 89 transitions, 586 flow [2024-06-04 16:23:20,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 89 transitions, 559 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-04 16:23:20,926 INFO L231 Difference]: Finished difference. Result has 63 places, 53 transitions, 297 flow [2024-06-04 16:23:20,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=297, PETRI_PLACES=63, PETRI_TRANSITIONS=53} [2024-06-04 16:23:20,927 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-04 16:23:20,927 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 53 transitions, 297 flow [2024-06-04 16:23:20,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:20,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:23:20,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:23:20,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 16:23:20,928 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:23:20,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:23:20,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1501628911, now seen corresponding path program 1 times [2024-06-04 16:23:20,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:23:20,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217706578] [2024-06-04 16:23:20,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:23:20,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:23:20,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:23:21,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-04 16:23:21,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:23:21,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217706578] [2024-06-04 16:23:21,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217706578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:23:21,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:23:21,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:23:21,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066391181] [2024-06-04 16:23:21,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:23:21,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:23:21,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:23:21,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:23:21,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:23:21,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 46 [2024-06-04 16:23:21,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 53 transitions, 297 flow. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:21,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:23:21,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 46 [2024-06-04 16:23:21,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:23:21,464 INFO L124 PetriNetUnfolderBase]: 5514/7328 cut-off events. [2024-06-04 16:23:21,464 INFO L125 PetriNetUnfolderBase]: For 14685/14685 co-relation queries the response was YES. [2024-06-04 16:23:21,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21778 conditions, 7328 events. 5514/7328 cut-off events. For 14685/14685 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 33777 event pairs, 1014 based on Foata normal form. 64/6957 useless extension candidates. Maximal degree in co-relation 21744. Up to 5377 conditions per place. [2024-06-04 16:23:21,493 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 82 selfloop transitions, 7 changer transitions 12/105 dead transitions. [2024-06-04 16:23:21,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 105 transitions, 655 flow [2024-06-04 16:23:21,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:23:21,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:23:21,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-04 16:23:21,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5478260869565217 [2024-06-04 16:23:21,494 INFO L175 Difference]: Start difference. First operand has 63 places, 53 transitions, 297 flow. Second operand 5 states and 126 transitions. [2024-06-04 16:23:21,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 105 transitions, 655 flow [2024-06-04 16:23:21,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 105 transitions, 631 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-04 16:23:21,538 INFO L231 Difference]: Finished difference. Result has 62 places, 54 transitions, 316 flow [2024-06-04 16:23:21,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=316, PETRI_PLACES=62, PETRI_TRANSITIONS=54} [2024-06-04 16:23:21,539 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2024-06-04 16:23:21,539 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 54 transitions, 316 flow [2024-06-04 16:23:21,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:21,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:23:21,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:23:21,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 16:23:21,540 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:23:21,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:23:21,540 INFO L85 PathProgramCache]: Analyzing trace with hash -2024812697, now seen corresponding path program 2 times [2024-06-04 16:23:21,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:23:21,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892592814] [2024-06-04 16:23:21,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:23:21,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:23:21,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:23:21,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-04 16:23:21,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:23:21,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892592814] [2024-06-04 16:23:21,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892592814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:23:21,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:23:21,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:23:21,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795979853] [2024-06-04 16:23:21,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:23:21,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:23:21,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:23:21,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:23:21,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:23:21,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 46 [2024-06-04 16:23:21,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 54 transitions, 316 flow. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:21,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:23:21,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 46 [2024-06-04 16:23:21,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:23:22,094 INFO L124 PetriNetUnfolderBase]: 5274/7024 cut-off events. [2024-06-04 16:23:22,094 INFO L125 PetriNetUnfolderBase]: For 15322/15322 co-relation queries the response was YES. [2024-06-04 16:23:22,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20044 conditions, 7024 events. 5274/7024 cut-off events. For 15322/15322 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 32759 event pairs, 1194 based on Foata normal form. 64/5904 useless extension candidates. Maximal degree in co-relation 20010. Up to 5271 conditions per place. [2024-06-04 16:23:22,113 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 79 selfloop transitions, 7 changer transitions 12/102 dead transitions. [2024-06-04 16:23:22,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 102 transitions, 639 flow [2024-06-04 16:23:22,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:23:22,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:23:22,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-04 16:23:22,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5347826086956522 [2024-06-04 16:23:22,115 INFO L175 Difference]: Start difference. First operand has 62 places, 54 transitions, 316 flow. Second operand 5 states and 123 transitions. [2024-06-04 16:23:22,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 102 transitions, 639 flow [2024-06-04 16:23:22,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 102 transitions, 627 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 16:23:22,145 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 322 flow [2024-06-04 16:23:22,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=322, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2024-06-04 16:23:22,146 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 22 predicate places. [2024-06-04 16:23:22,146 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 322 flow [2024-06-04 16:23:22,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:22,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:23:22,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:23:22,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 16:23:22,146 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:23:22,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:23:22,147 INFO L85 PathProgramCache]: Analyzing trace with hash -682036526, now seen corresponding path program 1 times [2024-06-04 16:23:22,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:23:22,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642478630] [2024-06-04 16:23:22,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:23:22,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:23:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:23:22,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-04 16:23:22,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:23:22,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642478630] [2024-06-04 16:23:22,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642478630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:23:22,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:23:22,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:23:22,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534871641] [2024-06-04 16:23:22,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:23:22,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:23:22,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:23:22,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:23:22,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:23:22,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 46 [2024-06-04 16:23:22,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 322 flow. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:22,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:23:22,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 46 [2024-06-04 16:23:22,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:23:22,746 INFO L124 PetriNetUnfolderBase]: 5690/7568 cut-off events. [2024-06-04 16:23:22,746 INFO L125 PetriNetUnfolderBase]: For 17916/17916 co-relation queries the response was YES. [2024-06-04 16:23:22,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21729 conditions, 7568 events. 5690/7568 cut-off events. For 17916/17916 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 35532 event pairs, 1257 based on Foata normal form. 64/6353 useless extension candidates. Maximal degree in co-relation 21694. Up to 5647 conditions per place. [2024-06-04 16:23:22,773 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 80 selfloop transitions, 7 changer transitions 15/106 dead transitions. [2024-06-04 16:23:22,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 106 transitions, 669 flow [2024-06-04 16:23:22,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:23:22,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:23:22,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-04 16:23:22,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5478260869565217 [2024-06-04 16:23:22,775 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 322 flow. Second operand 5 states and 126 transitions. [2024-06-04 16:23:22,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 106 transitions, 669 flow [2024-06-04 16:23:22,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 106 transitions, 655 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-04 16:23:22,833 INFO L231 Difference]: Finished difference. Result has 66 places, 55 transitions, 338 flow [2024-06-04 16:23:22,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=338, PETRI_PLACES=66, PETRI_TRANSITIONS=55} [2024-06-04 16:23:22,833 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2024-06-04 16:23:22,834 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 55 transitions, 338 flow [2024-06-04 16:23:22,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:22,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:23:22,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:23:22,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 16:23:22,834 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:23:22,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:23:22,835 INFO L85 PathProgramCache]: Analyzing trace with hash -682030946, now seen corresponding path program 2 times [2024-06-04 16:23:22,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:23:22,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93950135] [2024-06-04 16:23:22,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:23:22,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:23:22,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:23:22,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-04 16:23:22,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:23:22,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93950135] [2024-06-04 16:23:22,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93950135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:23:22,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:23:22,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:23:22,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998935654] [2024-06-04 16:23:22,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:23:22,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:23:22,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:23:22,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:23:22,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:23:22,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 46 [2024-06-04 16:23:22,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 55 transitions, 338 flow. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:22,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:23:22,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 46 [2024-06-04 16:23:22,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:23:23,412 INFO L124 PetriNetUnfolderBase]: 5450/7264 cut-off events. [2024-06-04 16:23:23,412 INFO L125 PetriNetUnfolderBase]: For 17211/17211 co-relation queries the response was YES. [2024-06-04 16:23:23,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20542 conditions, 7264 events. 5450/7264 cut-off events. For 17211/17211 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 34265 event pairs, 1170 based on Foata normal form. 64/6096 useless extension candidates. Maximal degree in co-relation 20506. Up to 5511 conditions per place. [2024-06-04 16:23:23,437 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 74 selfloop transitions, 7 changer transitions 18/103 dead transitions. [2024-06-04 16:23:23,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 103 transitions, 663 flow [2024-06-04 16:23:23,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:23:23,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:23:23,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-04 16:23:23,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5347826086956522 [2024-06-04 16:23:23,438 INFO L175 Difference]: Start difference. First operand has 66 places, 55 transitions, 338 flow. Second operand 5 states and 123 transitions. [2024-06-04 16:23:23,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 103 transitions, 663 flow [2024-06-04 16:23:23,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 103 transitions, 651 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 16:23:23,479 INFO L231 Difference]: Finished difference. Result has 68 places, 55 transitions, 344 flow [2024-06-04 16:23:23,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=344, PETRI_PLACES=68, PETRI_TRANSITIONS=55} [2024-06-04 16:23:23,480 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2024-06-04 16:23:23,480 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 55 transitions, 344 flow [2024-06-04 16:23:23,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:23,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:23:23,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:23:23,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 16:23:23,481 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:23:23,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:23:23,481 INFO L85 PathProgramCache]: Analyzing trace with hash 625228076, now seen corresponding path program 1 times [2024-06-04 16:23:23,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:23:23,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494198432] [2024-06-04 16:23:23,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:23:23,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:23:23,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:23:23,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-04 16:23:23,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:23:23,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494198432] [2024-06-04 16:23:23,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494198432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:23:23,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:23:23,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:23:23,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201177806] [2024-06-04 16:23:23,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:23:23,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:23:23,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:23:23,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:23:23,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:23:23,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 46 [2024-06-04 16:23:23,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 55 transitions, 344 flow. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:23,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:23:23,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 46 [2024-06-04 16:23:23,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:23:24,176 INFO L124 PetriNetUnfolderBase]: 5866/7808 cut-off events. [2024-06-04 16:23:24,176 INFO L125 PetriNetUnfolderBase]: For 19356/19356 co-relation queries the response was YES. [2024-06-04 16:23:24,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22163 conditions, 7808 events. 5866/7808 cut-off events. For 19356/19356 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 36610 event pairs, 918 based on Foata normal form. 64/6545 useless extension candidates. Maximal degree in co-relation 22126. Up to 5101 conditions per place. [2024-06-04 16:23:24,200 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 65 selfloop transitions, 5 changer transitions 51/125 dead transitions. [2024-06-04 16:23:24,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 125 transitions, 783 flow [2024-06-04 16:23:24,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:23:24,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:23:24,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-04 16:23:24,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5507246376811594 [2024-06-04 16:23:24,202 INFO L175 Difference]: Start difference. First operand has 68 places, 55 transitions, 344 flow. Second operand 6 states and 152 transitions. [2024-06-04 16:23:24,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 125 transitions, 783 flow [2024-06-04 16:23:24,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 125 transitions, 769 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-04 16:23:24,246 INFO L231 Difference]: Finished difference. Result has 71 places, 53 transitions, 320 flow [2024-06-04 16:23:24,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=320, PETRI_PLACES=71, PETRI_TRANSITIONS=53} [2024-06-04 16:23:24,247 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2024-06-04 16:23:24,247 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 53 transitions, 320 flow [2024-06-04 16:23:24,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:24,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:23:24,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:23:24,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 16:23:24,247 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:23:24,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:23:24,248 INFO L85 PathProgramCache]: Analyzing trace with hash 625233656, now seen corresponding path program 2 times [2024-06-04 16:23:24,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:23:24,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951522561] [2024-06-04 16:23:24,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:23:24,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:23:24,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:23:24,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-04 16:23:24,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:23:24,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951522561] [2024-06-04 16:23:24,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951522561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:23:24,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:23:24,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:23:24,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552765328] [2024-06-04 16:23:24,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:23:24,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:23:24,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:23:24,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:23:24,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:23:24,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 46 [2024-06-04 16:23:24,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 53 transitions, 320 flow. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:24,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:23:24,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 46 [2024-06-04 16:23:24,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:23:24,886 INFO L124 PetriNetUnfolderBase]: 5286/7052 cut-off events. [2024-06-04 16:23:24,887 INFO L125 PetriNetUnfolderBase]: For 18671/18671 co-relation queries the response was YES. [2024-06-04 16:23:24,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19964 conditions, 7052 events. 5286/7052 cut-off events. For 18671/18671 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 32712 event pairs, 1062 based on Foata normal form. 64/5909 useless extension candidates. Maximal degree in co-relation 19926. Up to 4525 conditions per place. [2024-06-04 16:23:24,907 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 50 selfloop transitions, 3 changer transitions 63/120 dead transitions. [2024-06-04 16:23:24,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 120 transitions, 743 flow [2024-06-04 16:23:24,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:23:24,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:23:24,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-04 16:23:24,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5362318840579711 [2024-06-04 16:23:24,908 INFO L175 Difference]: Start difference. First operand has 71 places, 53 transitions, 320 flow. Second operand 6 states and 148 transitions. [2024-06-04 16:23:24,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 120 transitions, 743 flow [2024-06-04 16:23:24,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 120 transitions, 723 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-04 16:23:24,958 INFO L231 Difference]: Finished difference. Result has 69 places, 50 transitions, 282 flow [2024-06-04 16:23:24,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=282, PETRI_PLACES=69, PETRI_TRANSITIONS=50} [2024-06-04 16:23:24,959 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 27 predicate places. [2024-06-04 16:23:24,959 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 50 transitions, 282 flow [2024-06-04 16:23:24,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:24,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:23:24,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:23:24,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 16:23:24,960 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:23:24,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:23:24,960 INFO L85 PathProgramCache]: Analyzing trace with hash 625429886, now seen corresponding path program 3 times [2024-06-04 16:23:24,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:23:24,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210280151] [2024-06-04 16:23:24,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:23:24,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:23:24,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:23:25,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-04 16:23:25,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:23:25,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210280151] [2024-06-04 16:23:25,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210280151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:23:25,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:23:25,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:23:25,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683772517] [2024-06-04 16:23:25,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:23:25,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:23:25,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:23:25,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:23:25,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:23:25,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 46 [2024-06-04 16:23:25,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 50 transitions, 282 flow. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:25,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:23:25,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 46 [2024-06-04 16:23:25,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:23:25,513 INFO L124 PetriNetUnfolderBase]: 4316/5766 cut-off events. [2024-06-04 16:23:25,513 INFO L125 PetriNetUnfolderBase]: For 14283/14283 co-relation queries the response was YES. [2024-06-04 16:23:25,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16131 conditions, 5766 events. 4316/5766 cut-off events. For 14283/14283 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 25089 event pairs, 690 based on Foata normal form. 64/4842 useless extension candidates. Maximal degree in co-relation 16094. Up to 3089 conditions per place. [2024-06-04 16:23:25,528 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 55 selfloop transitions, 4 changer transitions 51/114 dead transitions. [2024-06-04 16:23:25,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 114 transitions, 682 flow [2024-06-04 16:23:25,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:23:25,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:23:25,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-04 16:23:25,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5253623188405797 [2024-06-04 16:23:25,529 INFO L175 Difference]: Start difference. First operand has 69 places, 50 transitions, 282 flow. Second operand 6 states and 145 transitions. [2024-06-04 16:23:25,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 114 transitions, 682 flow [2024-06-04 16:23:25,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 114 transitions, 643 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-04 16:23:25,552 INFO L231 Difference]: Finished difference. Result has 64 places, 48 transitions, 243 flow [2024-06-04 16:23:25,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=64, PETRI_TRANSITIONS=48} [2024-06-04 16:23:25,553 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 22 predicate places. [2024-06-04 16:23:25,553 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 48 transitions, 243 flow [2024-06-04 16:23:25,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:25,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:23:25,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:23:25,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 16:23:25,553 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:23:25,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:23:25,554 INFO L85 PathProgramCache]: Analyzing trace with hash 625441976, now seen corresponding path program 4 times [2024-06-04 16:23:25,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:23:25,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788818574] [2024-06-04 16:23:25,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:23:25,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:23:25,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:23:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-04 16:23:25,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:23:25,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788818574] [2024-06-04 16:23:25,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788818574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:23:25,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:23:25,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:23:25,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88534809] [2024-06-04 16:23:25,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:23:25,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:23:25,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:23:25,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:23:25,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:23:25,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 46 [2024-06-04 16:23:25,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 48 transitions, 243 flow. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:25,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:23:25,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 46 [2024-06-04 16:23:25,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:23:26,035 INFO L124 PetriNetUnfolderBase]: 3736/5010 cut-off events. [2024-06-04 16:23:26,035 INFO L125 PetriNetUnfolderBase]: For 8853/8853 co-relation queries the response was YES. [2024-06-04 16:23:26,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13339 conditions, 5010 events. 3736/5010 cut-off events. For 8853/8853 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 21719 event pairs, 834 based on Foata normal form. 64/4206 useless extension candidates. Maximal degree in co-relation 13305. Up to 2513 conditions per place. [2024-06-04 16:23:26,048 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 43 selfloop transitions, 2 changer transitions 60/109 dead transitions. [2024-06-04 16:23:26,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 109 transitions, 615 flow [2024-06-04 16:23:26,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:23:26,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:23:26,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-04 16:23:26,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108695652173914 [2024-06-04 16:23:26,049 INFO L175 Difference]: Start difference. First operand has 64 places, 48 transitions, 243 flow. Second operand 6 states and 141 transitions. [2024-06-04 16:23:26,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 109 transitions, 615 flow [2024-06-04 16:23:26,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 109 transitions, 597 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-04 16:23:26,071 INFO L231 Difference]: Finished difference. Result has 62 places, 45 transitions, 206 flow [2024-06-04 16:23:26,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=206, PETRI_PLACES=62, PETRI_TRANSITIONS=45} [2024-06-04 16:23:26,071 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2024-06-04 16:23:26,071 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 45 transitions, 206 flow [2024-06-04 16:23:26,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:26,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:23:26,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:23:26,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 16:23:26,072 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:23:26,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:23:26,072 INFO L85 PathProgramCache]: Analyzing trace with hash 625608446, now seen corresponding path program 5 times [2024-06-04 16:23:26,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:23:26,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005959448] [2024-06-04 16:23:26,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:23:26,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:23:26,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:23:26,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-04 16:23:26,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:23:26,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005959448] [2024-06-04 16:23:26,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005959448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:23:26,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:23:26,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:23:26,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118417337] [2024-06-04 16:23:26,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:23:26,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:23:26,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:23:26,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:23:26,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:23:26,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 46 [2024-06-04 16:23:26,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 45 transitions, 206 flow. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:26,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:23:26,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 46 [2024-06-04 16:23:26,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:23:26,465 INFO L124 PetriNetUnfolderBase]: 2784/3754 cut-off events. [2024-06-04 16:23:26,465 INFO L125 PetriNetUnfolderBase]: For 5873/5873 co-relation queries the response was YES. [2024-06-04 16:23:26,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9766 conditions, 3754 events. 2784/3754 cut-off events. For 5873/5873 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 14979 event pairs, 498 based on Foata normal form. 64/3166 useless extension candidates. Maximal degree in co-relation 9733. Up to 1425 conditions per place. [2024-06-04 16:23:26,474 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 48 selfloop transitions, 3 changer transitions 48/103 dead transitions. [2024-06-04 16:23:26,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 103 transitions, 554 flow [2024-06-04 16:23:26,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:23:26,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:23:26,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-04 16:23:26,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-04 16:23:26,476 INFO L175 Difference]: Start difference. First operand has 62 places, 45 transitions, 206 flow. Second operand 6 states and 138 transitions. [2024-06-04 16:23:26,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 103 transitions, 554 flow [2024-06-04 16:23:26,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 103 transitions, 514 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-04 16:23:26,483 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 166 flow [2024-06-04 16:23:26,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=166, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2024-06-04 16:23:26,484 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2024-06-04 16:23:26,484 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 166 flow [2024-06-04 16:23:26,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:26,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:23:26,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:23:26,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 16:23:26,485 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:23:26,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:23:26,486 INFO L85 PathProgramCache]: Analyzing trace with hash 625614956, now seen corresponding path program 6 times [2024-06-04 16:23:26,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:23:26,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779894697] [2024-06-04 16:23:26,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:23:26,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:23:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:23:26,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-04 16:23:26,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:23:26,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779894697] [2024-06-04 16:23:26,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779894697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:23:26,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:23:26,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:23:26,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587080724] [2024-06-04 16:23:26,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:23:26,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:23:26,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:23:26,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:23:26,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:23:26,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 46 [2024-06-04 16:23:26,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 43 transitions, 166 flow. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:26,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:23:26,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 46 [2024-06-04 16:23:26,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:23:26,803 INFO L124 PetriNetUnfolderBase]: 1680/2330 cut-off events. [2024-06-04 16:23:26,803 INFO L125 PetriNetUnfolderBase]: For 1700/1700 co-relation queries the response was YES. [2024-06-04 16:23:26,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5423 conditions, 2330 events. 1680/2330 cut-off events. For 1700/1700 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 9254 event pairs, 306 based on Foata normal form. 64/1982 useless extension candidates. Maximal degree in co-relation 5410. Up to 629 conditions per place. [2024-06-04 16:23:26,808 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 0 selfloop transitions, 0 changer transitions 84/84 dead transitions. [2024-06-04 16:23:26,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 84 transitions, 408 flow [2024-06-04 16:23:26,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:23:26,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:23:26,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-04 16:23:26,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43478260869565216 [2024-06-04 16:23:26,809 INFO L175 Difference]: Start difference. First operand has 55 places, 43 transitions, 166 flow. Second operand 6 states and 120 transitions. [2024-06-04 16:23:26,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 84 transitions, 408 flow [2024-06-04 16:23:26,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 84 transitions, 400 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 16:23:26,810 INFO L231 Difference]: Finished difference. Result has 52 places, 0 transitions, 0 flow [2024-06-04 16:23:26,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=52, PETRI_TRANSITIONS=0} [2024-06-04 16:23:26,811 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2024-06-04 16:23:26,811 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 0 transitions, 0 flow [2024-06-04 16:23:26,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:23:26,813 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 6 remaining) [2024-06-04 16:23:26,814 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 6 remaining) [2024-06-04 16:23:26,814 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 6 remaining) [2024-06-04 16:23:26,814 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2024-06-04 16:23:26,814 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2024-06-04 16:23:26,814 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2024-06-04 16:23:26,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 16:23:26,815 INFO L445 BasicCegarLoop]: Path program histogram: [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:23:26,817 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-04 16:23:26,818 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-04 16:23:26,822 INFO L507 ceAbstractionStarter]: Automizer considered 3 witness invariants [2024-06-04 16:23:26,822 INFO L508 ceAbstractionStarter]: WitnessConsidered=3 [2024-06-04 16:23:26,823 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.06 04:23:26 BasicIcfg [2024-06-04 16:23:26,823 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-04 16:23:26,823 INFO L158 Benchmark]: Toolchain (without parser) took 16087.99ms. Allocated memory was 157.3MB in the beginning and 2.6GB in the end (delta: 2.5GB). Free memory was 85.3MB in the beginning and 1.7GB in the end (delta: -1.6GB). Peak memory consumption was 836.4MB. Max. memory is 16.1GB. [2024-06-04 16:23:26,824 INFO L158 Benchmark]: Witness Parser took 0.15ms. Allocated memory is still 157.3MB. Free memory is still 119.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-04 16:23:26,824 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 157.3MB. Free memory was 132.0MB in the beginning and 131.9MB in the end (delta: 115.7kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-04 16:23:26,824 INFO L158 Benchmark]: CACSL2BoogieTranslator took 369.60ms. Allocated memory is still 157.3MB. Free memory was 85.2MB in the beginning and 130.0MB in the end (delta: -44.8MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-06-04 16:23:26,824 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.52ms. Allocated memory is still 157.3MB. Free memory was 130.0MB in the beginning and 127.8MB in the end (delta: 2.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-04 16:23:26,825 INFO L158 Benchmark]: Boogie Preprocessor took 52.06ms. Allocated memory is still 157.3MB. Free memory was 127.8MB in the beginning and 124.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-04 16:23:26,825 INFO L158 Benchmark]: RCFGBuilder took 685.77ms. Allocated memory is still 157.3MB. Free memory was 124.7MB in the beginning and 121.7MB in the end (delta: 3.0MB). Peak memory consumption was 82.6MB. Max. memory is 16.1GB. [2024-06-04 16:23:26,825 INFO L158 Benchmark]: TraceAbstraction took 14940.07ms. Allocated memory was 157.3MB in the beginning and 2.6GB in the end (delta: 2.5GB). Free memory was 120.9MB in the beginning and 1.7GB in the end (delta: -1.6GB). Peak memory consumption was 869.3MB. Max. memory is 16.1GB. [2024-06-04 16:23:26,826 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.15ms. Allocated memory is still 157.3MB. Free memory is still 119.3MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.11ms. Allocated memory is still 157.3MB. Free memory was 132.0MB in the beginning and 131.9MB in the end (delta: 115.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 369.60ms. Allocated memory is still 157.3MB. Free memory was 85.2MB in the beginning and 130.0MB in the end (delta: -44.8MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.52ms. Allocated memory is still 157.3MB. Free memory was 130.0MB in the beginning and 127.8MB in the end (delta: 2.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 52.06ms. Allocated memory is still 157.3MB. Free memory was 127.8MB in the beginning and 124.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 685.77ms. Allocated memory is still 157.3MB. Free memory was 124.7MB in the beginning and 121.7MB in the end (delta: 3.0MB). Peak memory consumption was 82.6MB. Max. memory is 16.1GB. * TraceAbstraction took 14940.07ms. Allocated memory was 157.3MB in the beginning and 2.6GB in the end (delta: 2.5GB). Free memory was 120.9MB in the beginning and 1.7GB in the end (delta: -1.6GB). Peak memory consumption was 869.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 93]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 94]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 95]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 56 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 14.9s, OverallIterations: 22, TraceHistogramMax: 1, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 12.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1183 SdHoareTripleChecker+Valid, 2.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1074 mSDsluCounter, 26 SdHoareTripleChecker+Invalid, 1.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 113 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4806 IncrementalHoareTripleChecker+Invalid, 4919 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 113 mSolverCounterUnsat, 26 mSDtfsCounter, 4806 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 81 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=384occurred in iteration=9, InterpolantAutomatonStates: 113, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 479 NumberOfCodeBlocks, 479 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 457 ConstructedInterpolants, 0 QuantifiedInterpolants, 3955 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 22 InterpolantComputations, 22 PerfectInterpolantSequences, 44/44 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-04 16:23:26,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE