./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe022_tso.i --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/protection/safe022_tso.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/pthread-wmm/safe022_tso.i ./goblint.2024-05-21_14-57-05.files/protection/safe022_tso.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 [2024-06-03 18:49:48,165 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 18:49:48,215 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 18:49:48,219 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 18:49:48,219 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 18:49:48,253 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 18:49:48,253 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 18:49:48,253 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 18:49:48,254 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 18:49:48,254 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 18:49:48,254 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 18:49:48,255 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 18:49:48,255 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 18:49:48,256 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 18:49:48,259 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 18:49:48,260 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 18:49:48,260 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 18:49:48,261 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 18:49:48,261 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 18:49:48,261 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 18:49:48,262 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 18:49:48,262 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 18:49:48,263 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 18:49:48,264 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 18:49:48,264 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 18:49:48,264 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 18:49:48,265 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 18:49:48,265 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 18:49:48,265 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 18:49:48,265 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 18:49:48,265 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 18:49:48,266 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 18:49:48,266 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 18:49:48,266 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 18:49:48,266 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 18:49:48,267 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 18:49:48,267 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 18:49:48,267 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 18:49:48,267 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 18:49:48,268 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 18:49:48,268 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 18:49:48,269 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 18:49:48,269 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 18:49:48,269 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 18:49:48,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 18:49:48,573 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 18:49:48,575 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 18:49:48,576 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 18:49:48,577 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 18:49:48,578 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe022_tso.i [2024-06-03 18:49:49,771 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 18:49:50,000 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 18:49:50,001 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe022_tso.i [2024-06-03 18:49:50,022 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7bb628f5/39bb29c863f745d78460729c74a685d8/FLAGc4f7fca77 [2024-06-03 18:49:50,035 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7bb628f5/39bb29c863f745d78460729c74a685d8 [2024-06-03 18:49:50,038 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 18:49:50,039 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 18:49:50,039 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe022_tso.yml/witness.yml [2024-06-03 18:49:50,158 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 18:49:50,159 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 18:49:50,160 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 18:49:50,160 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 18:49:50,166 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 18:49:50,167 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 06:49:50" (1/2) ... [2024-06-03 18:49:50,168 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67392f7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:49:50, skipping insertion in model container [2024-06-03 18:49:50,168 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 06:49:50" (1/2) ... [2024-06-03 18:49:50,170 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@431664ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:49:50, skipping insertion in model container [2024-06-03 18:49:50,170 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 06:49:50" (2/2) ... [2024-06-03 18:49:50,172 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67392f7b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:49:50, skipping insertion in model container [2024-06-03 18:49:50,173 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 06:49:50" (2/2) ... [2024-06-03 18:49:50,173 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 18:49:50,219 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 18:49:50,220 INFO L97 edCorrectnessWitness]: Location invariant before [L763-L763] ((((! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-03 18:49:50,220 INFO L97 edCorrectnessWitness]: Location invariant before [L764-L764] ((((! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-03 18:49:50,221 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 18:49:50,221 INFO L106 edCorrectnessWitness]: ghost_update [L761-L761] multithreaded = 1; [2024-06-03 18:49:50,265 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 18:49:50,618 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 18:49:50,627 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 18:49:50,726 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 18:49:50,755 INFO L206 MainTranslator]: Completed translation [2024-06-03 18:49:50,756 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:49:50 WrapperNode [2024-06-03 18:49:50,756 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 18:49:50,757 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 18:49:50,757 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 18:49:50,757 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 18:49:50,763 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:49:50" (1/1) ... [2024-06-03 18:49:50,774 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:49:50" (1/1) ... [2024-06-03 18:49:50,802 INFO L138 Inliner]: procedures = 174, calls = 33, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 57 [2024-06-03 18:49:50,803 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 18:49:50,804 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 18:49:50,804 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 18:49:50,804 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 18:49:50,812 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:49:50" (1/1) ... [2024-06-03 18:49:50,812 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:49:50" (1/1) ... [2024-06-03 18:49:50,814 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:49:50" (1/1) ... [2024-06-03 18:49:50,826 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-03 18:49:50,826 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:49:50" (1/1) ... [2024-06-03 18:49:50,826 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:49:50" (1/1) ... [2024-06-03 18:49:50,832 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:49:50" (1/1) ... [2024-06-03 18:49:50,833 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:49:50" (1/1) ... [2024-06-03 18:49:50,836 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:49:50" (1/1) ... [2024-06-03 18:49:50,837 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:49:50" (1/1) ... [2024-06-03 18:49:50,843 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 18:49:50,844 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 18:49:50,844 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 18:49:50,844 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 18:49:50,845 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:49:50" (1/1) ... [2024-06-03 18:49:50,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 18:49:50,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 18:49:50,873 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) [2024-06-03 18:49:50,883 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 [2024-06-03 18:49:50,933 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 18:49:50,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 18:49:50,949 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 18:49:50,949 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 18:49:50,949 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 18:49:50,949 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 18:49:50,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 18:49:50,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 18:49:50,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 18:49:50,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 18:49:50,952 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 18:49:51,088 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 18:49:51,090 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 18:49:51,246 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 18:49:51,247 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 18:49:51,334 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 18:49:51,334 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 18:49:51,334 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 06:49:51 BoogieIcfgContainer [2024-06-03 18:49:51,335 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 18:49:51,336 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 18:49:51,336 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 18:49:51,339 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 18:49:51,339 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 06:49:50" (1/4) ... [2024-06-03 18:49:51,340 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53bb0f5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 06:49:51, skipping insertion in model container [2024-06-03 18:49:51,342 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 06:49:50" (2/4) ... [2024-06-03 18:49:51,342 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53bb0f5f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 06:49:51, skipping insertion in model container [2024-06-03 18:49:51,343 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:49:50" (3/4) ... [2024-06-03 18:49:51,343 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53bb0f5f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 06:49:51, skipping insertion in model container [2024-06-03 18:49:51,343 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 06:49:51" (4/4) ... [2024-06-03 18:49:51,344 INFO L112 eAbstractionObserver]: Analyzing ICFG safe022_tso.i [2024-06-03 18:49:51,360 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 18:49:51,360 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-03 18:49:51,361 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 18:49:51,405 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 18:49:51,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 30 transitions, 68 flow [2024-06-03 18:49:51,476 INFO L124 PetriNetUnfolderBase]: 0/28 cut-off events. [2024-06-03 18:49:51,478 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 18:49:51,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 28 events. 0/28 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 39 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 18:49:51,481 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 30 transitions, 68 flow [2024-06-03 18:49:51,483 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 22 transitions, 50 flow [2024-06-03 18:49:51,491 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 18:49:51,497 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;@7de8177c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 18:49:51,497 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-03 18:49:51,500 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 18:49:51,501 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-03 18:49:51,501 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 18:49:51,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:51,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 18:49:51,502 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:49:51,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:51,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1558221865, now seen corresponding path program 1 times [2024-06-03 18:49:51,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:51,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509415221] [2024-06-03 18:49:51,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:51,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:51,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:51,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:51,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:51,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509415221] [2024-06-03 18:49:51,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509415221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:51,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:51,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 18:49:51,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155847224] [2024-06-03 18:49:51,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:51,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 18:49:51,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:51,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 18:49:51,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 18:49:52,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 30 [2024-06-03 18:49:52,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 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) [2024-06-03 18:49:52,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:52,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 30 [2024-06-03 18:49:52,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:52,093 INFO L124 PetriNetUnfolderBase]: 65/143 cut-off events. [2024-06-03 18:49:52,093 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-03 18:49:52,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290 conditions, 143 events. 65/143 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 497 event pairs, 33 based on Foata normal form. 1/133 useless extension candidates. Maximal degree in co-relation 276. Up to 124 conditions per place. [2024-06-03 18:49:52,098 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 19 selfloop transitions, 3 changer transitions 0/28 dead transitions. [2024-06-03 18:49:52,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 28 transitions, 109 flow [2024-06-03 18:49:52,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 18:49:52,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 18:49:52,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2024-06-03 18:49:52,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-03 18:49:52,113 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 50 flow. Second operand 3 states and 60 transitions. [2024-06-03 18:49:52,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 28 transitions, 109 flow [2024-06-03 18:49:52,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 28 transitions, 106 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-03 18:49:52,119 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 69 flow [2024-06-03 18:49:52,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2024-06-03 18:49:52,124 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2024-06-03 18:49:52,125 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 69 flow [2024-06-03 18:49:52,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 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) [2024-06-03 18:49:52,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:52,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:49:52,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 18:49:52,126 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:49:52,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:52,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1492255198, now seen corresponding path program 1 times [2024-06-03 18:49:52,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:52,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067710489] [2024-06-03 18:49:52,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:52,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:52,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:52,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:52,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:52,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067710489] [2024-06-03 18:49:52,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067710489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:52,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:52,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 18:49:52,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799147166] [2024-06-03 18:49:52,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:52,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 18:49:52,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:52,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 18:49:52,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 18:49:52,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 30 [2024-06-03 18:49:52,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 69 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:52,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:52,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 30 [2024-06-03 18:49:52,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:52,490 INFO L124 PetriNetUnfolderBase]: 82/178 cut-off events. [2024-06-03 18:49:52,492 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-06-03 18:49:52,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 178 events. 82/178 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 635 event pairs, 34 based on Foata normal form. 2/178 useless extension candidates. Maximal degree in co-relation 396. Up to 144 conditions per place. [2024-06-03 18:49:52,494 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 26 selfloop transitions, 5 changer transitions 0/36 dead transitions. [2024-06-03 18:49:52,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 36 transitions, 162 flow [2024-06-03 18:49:52,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 18:49:52,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 18:49:52,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 75 transitions. [2024-06-03 18:49:52,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-03 18:49:52,496 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 69 flow. Second operand 4 states and 75 transitions. [2024-06-03 18:49:52,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 36 transitions, 162 flow [2024-06-03 18:49:52,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 36 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 18:49:52,498 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 102 flow [2024-06-03 18:49:52,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2024-06-03 18:49:52,499 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2024-06-03 18:49:52,499 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 102 flow [2024-06-03 18:49:52,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:52,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:52,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:49:52,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 18:49:52,500 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:49:52,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:52,500 INFO L85 PathProgramCache]: Analyzing trace with hash 982049000, now seen corresponding path program 1 times [2024-06-03 18:49:52,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:52,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807687009] [2024-06-03 18:49:52,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:52,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:52,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:52,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:52,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:52,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807687009] [2024-06-03 18:49:52,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807687009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:52,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:52,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 18:49:52,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994020299] [2024-06-03 18:49:52,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:52,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 18:49:52,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:52,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 18:49:52,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 18:49:52,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:49:52,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:52,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:52,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:49:52,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:52,778 INFO L124 PetriNetUnfolderBase]: 97/203 cut-off events. [2024-06-03 18:49:52,780 INFO L125 PetriNetUnfolderBase]: For 118/118 co-relation queries the response was YES. [2024-06-03 18:49:52,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 536 conditions, 203 events. 97/203 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 717 event pairs, 28 based on Foata normal form. 2/204 useless extension candidates. Maximal degree in co-relation 518. Up to 161 conditions per place. [2024-06-03 18:49:52,785 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 35 selfloop transitions, 7 changer transitions 0/46 dead transitions. [2024-06-03 18:49:52,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 46 transitions, 237 flow [2024-06-03 18:49:52,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:49:52,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:49:52,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-03 18:49:52,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5866666666666667 [2024-06-03 18:49:52,793 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 102 flow. Second operand 5 states and 88 transitions. [2024-06-03 18:49:52,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 46 transitions, 237 flow [2024-06-03 18:49:52,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 46 transitions, 237 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-03 18:49:52,798 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 158 flow [2024-06-03 18:49:52,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=158, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-03 18:49:52,800 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 12 predicate places. [2024-06-03 18:49:52,800 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 158 flow [2024-06-03 18:49:52,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:52,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:52,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:49:52,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 18:49:52,801 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:49:52,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:52,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1143680793, now seen corresponding path program 1 times [2024-06-03 18:49:52,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:52,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119017173] [2024-06-03 18:49:52,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:52,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:52,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:53,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:53,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:53,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119017173] [2024-06-03 18:49:53,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119017173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:53,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:53,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:49:53,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856580475] [2024-06-03 18:49:53,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:53,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:49:53,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:53,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:49:53,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:49:53,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:49:53,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 158 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:53,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:53,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:49:53,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:53,135 INFO L124 PetriNetUnfolderBase]: 93/195 cut-off events. [2024-06-03 18:49:53,136 INFO L125 PetriNetUnfolderBase]: For 224/224 co-relation queries the response was YES. [2024-06-03 18:49:53,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 596 conditions, 195 events. 93/195 cut-off events. For 224/224 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 682 event pairs, 12 based on Foata normal form. 4/198 useless extension candidates. Maximal degree in co-relation 573. Up to 135 conditions per place. [2024-06-03 18:49:53,140 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 35 selfloop transitions, 8 changer transitions 0/47 dead transitions. [2024-06-03 18:49:53,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 47 transitions, 270 flow [2024-06-03 18:49:53,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:49:53,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:49:53,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-03 18:49:53,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-03 18:49:53,144 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 158 flow. Second operand 6 states and 99 transitions. [2024-06-03 18:49:53,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 47 transitions, 270 flow [2024-06-03 18:49:53,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 47 transitions, 270 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-03 18:49:53,149 INFO L231 Difference]: Finished difference. Result has 46 places, 33 transitions, 170 flow [2024-06-03 18:49:53,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=170, PETRI_PLACES=46, PETRI_TRANSITIONS=33} [2024-06-03 18:49:53,150 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 17 predicate places. [2024-06-03 18:49:53,151 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 33 transitions, 170 flow [2024-06-03 18:49:53,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:53,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:53,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:49:53,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 18:49:53,152 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:49:53,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:53,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1139486920, now seen corresponding path program 1 times [2024-06-03 18:49:53,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:53,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524877941] [2024-06-03 18:49:53,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:53,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:53,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:53,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:53,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:53,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524877941] [2024-06-03 18:49:53,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524877941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:53,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:53,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:49:53,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346040587] [2024-06-03 18:49:53,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:53,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:49:53,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:53,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:49:53,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:49:53,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:49:53,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 33 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:53,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:53,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:49:53,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:53,485 INFO L124 PetriNetUnfolderBase]: 96/204 cut-off events. [2024-06-03 18:49:53,485 INFO L125 PetriNetUnfolderBase]: For 337/337 co-relation queries the response was YES. [2024-06-03 18:49:53,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 663 conditions, 204 events. 96/204 cut-off events. For 337/337 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 729 event pairs, 24 based on Foata normal form. 1/204 useless extension candidates. Maximal degree in co-relation 637. Up to 143 conditions per place. [2024-06-03 18:49:53,487 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 34 selfloop transitions, 13 changer transitions 0/51 dead transitions. [2024-06-03 18:49:53,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 51 transitions, 322 flow [2024-06-03 18:49:53,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:49:53,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:49:53,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-03 18:49:53,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5722222222222222 [2024-06-03 18:49:53,490 INFO L175 Difference]: Start difference. First operand has 46 places, 33 transitions, 170 flow. Second operand 6 states and 103 transitions. [2024-06-03 18:49:53,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 51 transitions, 322 flow [2024-06-03 18:49:53,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 301 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-03 18:49:53,495 INFO L231 Difference]: Finished difference. Result has 47 places, 37 transitions, 200 flow [2024-06-03 18:49:53,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=200, PETRI_PLACES=47, PETRI_TRANSITIONS=37} [2024-06-03 18:49:53,498 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 18 predicate places. [2024-06-03 18:49:53,500 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 37 transitions, 200 flow [2024-06-03 18:49:53,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:53,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:53,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:49:53,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 18:49:53,506 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:49:53,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:53,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1139607076, now seen corresponding path program 1 times [2024-06-03 18:49:53,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:53,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309147446] [2024-06-03 18:49:53,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:53,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:53,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:53,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:53,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:53,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309147446] [2024-06-03 18:49:53,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309147446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:53,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:53,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:49:53,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000601582] [2024-06-03 18:49:53,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:53,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:49:53,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:53,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:49:53,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:49:53,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:49:53,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 37 transitions, 200 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:53,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:53,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:49:53,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:53,772 INFO L124 PetriNetUnfolderBase]: 102/214 cut-off events. [2024-06-03 18:49:53,772 INFO L125 PetriNetUnfolderBase]: For 450/450 co-relation queries the response was YES. [2024-06-03 18:49:53,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 737 conditions, 214 events. 102/214 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 772 event pairs, 24 based on Foata normal form. 1/214 useless extension candidates. Maximal degree in co-relation 711. Up to 156 conditions per place. [2024-06-03 18:49:53,774 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 36 selfloop transitions, 14 changer transitions 0/54 dead transitions. [2024-06-03 18:49:53,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 54 transitions, 368 flow [2024-06-03 18:49:53,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:49:53,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:49:53,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-03 18:49:53,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5611111111111111 [2024-06-03 18:49:53,776 INFO L175 Difference]: Start difference. First operand has 47 places, 37 transitions, 200 flow. Second operand 6 states and 101 transitions. [2024-06-03 18:49:53,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 54 transitions, 368 flow [2024-06-03 18:49:53,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 54 transitions, 342 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 18:49:53,779 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 248 flow [2024-06-03 18:49:53,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=248, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2024-06-03 18:49:53,780 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 22 predicate places. [2024-06-03 18:49:53,780 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 248 flow [2024-06-03 18:49:53,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:53,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:53,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:49:53,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 18:49:53,781 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:49:53,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:53,782 INFO L85 PathProgramCache]: Analyzing trace with hash 2081455280, now seen corresponding path program 2 times [2024-06-03 18:49:53,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:53,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795532776] [2024-06-03 18:49:53,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:53,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:53,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:53,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:53,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:53,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795532776] [2024-06-03 18:49:53,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795532776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:53,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:53,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:49:53,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062975127] [2024-06-03 18:49:53,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:53,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:49:53,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:53,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:49:53,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:49:53,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:49:53,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 248 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:53,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:53,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:49:53,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:54,029 INFO L124 PetriNetUnfolderBase]: 105/223 cut-off events. [2024-06-03 18:49:54,029 INFO L125 PetriNetUnfolderBase]: For 580/580 co-relation queries the response was YES. [2024-06-03 18:49:54,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 223 events. 105/223 cut-off events. For 580/580 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 818 event pairs, 23 based on Foata normal form. 1/223 useless extension candidates. Maximal degree in co-relation 772. Up to 170 conditions per place. [2024-06-03 18:49:54,031 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 39 selfloop transitions, 12 changer transitions 0/55 dead transitions. [2024-06-03 18:49:54,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 384 flow [2024-06-03 18:49:54,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:49:54,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:49:54,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-03 18:49:54,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-06-03 18:49:54,033 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 248 flow. Second operand 6 states and 98 transitions. [2024-06-03 18:49:54,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 384 flow [2024-06-03 18:49:54,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 55 transitions, 373 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-03 18:49:54,036 INFO L231 Difference]: Finished difference. Result has 56 places, 45 transitions, 280 flow [2024-06-03 18:49:54,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=280, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2024-06-03 18:49:54,037 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 27 predicate places. [2024-06-03 18:49:54,037 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 45 transitions, 280 flow [2024-06-03 18:49:54,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:54,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:54,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:49:54,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 18:49:54,038 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:49:54,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:54,039 INFO L85 PathProgramCache]: Analyzing trace with hash 123017922, now seen corresponding path program 2 times [2024-06-03 18:49:54,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:54,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321570025] [2024-06-03 18:49:54,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:54,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:54,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:54,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:54,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:54,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321570025] [2024-06-03 18:49:54,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321570025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:54,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:54,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:49:54,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043186783] [2024-06-03 18:49:54,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:54,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:49:54,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:54,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:49:54,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:49:54,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:49:54,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 45 transitions, 280 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:54,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:54,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:49:54,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:54,258 INFO L124 PetriNetUnfolderBase]: 108/228 cut-off events. [2024-06-03 18:49:54,258 INFO L125 PetriNetUnfolderBase]: For 709/709 co-relation queries the response was YES. [2024-06-03 18:49:54,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 869 conditions, 228 events. 108/228 cut-off events. For 709/709 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 856 event pairs, 24 based on Foata normal form. 1/228 useless extension candidates. Maximal degree in co-relation 839. Up to 165 conditions per place. [2024-06-03 18:49:54,260 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 37 selfloop transitions, 16 changer transitions 0/57 dead transitions. [2024-06-03 18:49:54,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 57 transitions, 436 flow [2024-06-03 18:49:54,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:49:54,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:49:54,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-03 18:49:54,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5866666666666667 [2024-06-03 18:49:54,262 INFO L175 Difference]: Start difference. First operand has 56 places, 45 transitions, 280 flow. Second operand 5 states and 88 transitions. [2024-06-03 18:49:54,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 57 transitions, 436 flow [2024-06-03 18:49:54,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 57 transitions, 407 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-03 18:49:54,266 INFO L231 Difference]: Finished difference. Result has 56 places, 47 transitions, 303 flow [2024-06-03 18:49:54,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=303, PETRI_PLACES=56, PETRI_TRANSITIONS=47} [2024-06-03 18:49:54,266 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 27 predicate places. [2024-06-03 18:49:54,267 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 47 transitions, 303 flow [2024-06-03 18:49:54,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:54,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:54,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:49:54,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 18:49:54,268 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:49:54,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:54,268 INFO L85 PathProgramCache]: Analyzing trace with hash 123024432, now seen corresponding path program 3 times [2024-06-03 18:49:54,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:54,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130501356] [2024-06-03 18:49:54,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:54,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:54,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:54,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:54,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:54,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130501356] [2024-06-03 18:49:54,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130501356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:54,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:54,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:49:54,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916103005] [2024-06-03 18:49:54,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:54,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:49:54,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:54,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:49:54,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:49:54,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:49:54,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 303 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:54,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:54,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:49:54,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:54,501 INFO L124 PetriNetUnfolderBase]: 106/225 cut-off events. [2024-06-03 18:49:54,501 INFO L125 PetriNetUnfolderBase]: For 816/816 co-relation queries the response was YES. [2024-06-03 18:49:54,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 878 conditions, 225 events. 106/225 cut-off events. For 816/816 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 839 event pairs, 24 based on Foata normal form. 1/225 useless extension candidates. Maximal degree in co-relation 848. Up to 169 conditions per place. [2024-06-03 18:49:54,503 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 39 selfloop transitions, 12 changer transitions 0/55 dead transitions. [2024-06-03 18:49:54,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 55 transitions, 425 flow [2024-06-03 18:49:54,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 18:49:54,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 18:49:54,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 74 transitions. [2024-06-03 18:49:54,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-03 18:49:54,505 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 303 flow. Second operand 4 states and 74 transitions. [2024-06-03 18:49:54,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 55 transitions, 425 flow [2024-06-03 18:49:54,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 55 transitions, 398 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 18:49:54,509 INFO L231 Difference]: Finished difference. Result has 57 places, 47 transitions, 312 flow [2024-06-03 18:49:54,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=312, PETRI_PLACES=57, PETRI_TRANSITIONS=47} [2024-06-03 18:49:54,510 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 28 predicate places. [2024-06-03 18:49:54,510 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 47 transitions, 312 flow [2024-06-03 18:49:54,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:54,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:54,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:49:54,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 18:49:54,511 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:49:54,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:54,511 INFO L85 PathProgramCache]: Analyzing trace with hash 123017736, now seen corresponding path program 3 times [2024-06-03 18:49:54,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:54,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34433908] [2024-06-03 18:49:54,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:54,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:54,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:54,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:54,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:54,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34433908] [2024-06-03 18:49:54,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34433908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:54,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:54,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:49:54,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616411204] [2024-06-03 18:49:54,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:54,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:49:54,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:54,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:49:54,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:49:54,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:49:54,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 47 transitions, 312 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:54,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:54,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:49:54,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:54,764 INFO L124 PetriNetUnfolderBase]: 104/222 cut-off events. [2024-06-03 18:49:54,764 INFO L125 PetriNetUnfolderBase]: For 838/838 co-relation queries the response was YES. [2024-06-03 18:49:54,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 871 conditions, 222 events. 104/222 cut-off events. For 838/838 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 821 event pairs, 23 based on Foata normal form. 1/222 useless extension candidates. Maximal degree in co-relation 841. Up to 157 conditions per place. [2024-06-03 18:49:54,766 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 40 selfloop transitions, 15 changer transitions 0/59 dead transitions. [2024-06-03 18:49:54,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 59 transitions, 452 flow [2024-06-03 18:49:54,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:49:54,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:49:54,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-03 18:49:54,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5933333333333334 [2024-06-03 18:49:54,768 INFO L175 Difference]: Start difference. First operand has 57 places, 47 transitions, 312 flow. Second operand 5 states and 89 transitions. [2024-06-03 18:49:54,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 59 transitions, 452 flow [2024-06-03 18:49:54,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 59 transitions, 428 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 18:49:54,774 INFO L231 Difference]: Finished difference. Result has 59 places, 47 transitions, 329 flow [2024-06-03 18:49:54,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=329, PETRI_PLACES=59, PETRI_TRANSITIONS=47} [2024-06-03 18:49:54,775 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 30 predicate places. [2024-06-03 18:49:54,778 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 47 transitions, 329 flow [2024-06-03 18:49:54,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:54,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:54,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:49:54,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 18:49:54,780 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:49:54,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:54,780 INFO L85 PathProgramCache]: Analyzing trace with hash 123264000, now seen corresponding path program 1 times [2024-06-03 18:49:54,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:54,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944439345] [2024-06-03 18:49:54,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:54,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:54,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:54,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:54,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:54,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944439345] [2024-06-03 18:49:54,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944439345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:54,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:54,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:49:54,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514587113] [2024-06-03 18:49:54,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:54,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:49:54,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:54,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:49:54,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:49:54,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:49:54,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 47 transitions, 329 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:54,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:54,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:49:54,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:55,006 INFO L124 PetriNetUnfolderBase]: 101/217 cut-off events. [2024-06-03 18:49:55,007 INFO L125 PetriNetUnfolderBase]: For 990/990 co-relation queries the response was YES. [2024-06-03 18:49:55,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 881 conditions, 217 events. 101/217 cut-off events. For 990/990 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 792 event pairs, 23 based on Foata normal form. 2/218 useless extension candidates. Maximal degree in co-relation 850. Up to 173 conditions per place. [2024-06-03 18:49:55,009 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 43 selfloop transitions, 6 changer transitions 0/53 dead transitions. [2024-06-03 18:49:55,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 53 transitions, 441 flow [2024-06-03 18:49:55,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 18:49:55,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 18:49:55,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2024-06-03 18:49:55,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-03 18:49:55,010 INFO L175 Difference]: Start difference. First operand has 59 places, 47 transitions, 329 flow. Second operand 4 states and 68 transitions. [2024-06-03 18:49:55,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 53 transitions, 441 flow [2024-06-03 18:49:55,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 53 transitions, 409 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-03 18:49:55,014 INFO L231 Difference]: Finished difference. Result has 59 places, 47 transitions, 313 flow [2024-06-03 18:49:55,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=313, PETRI_PLACES=59, PETRI_TRANSITIONS=47} [2024-06-03 18:49:55,015 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 30 predicate places. [2024-06-03 18:49:55,015 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 47 transitions, 313 flow [2024-06-03 18:49:55,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:55,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:55,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:49:55,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 18:49:55,016 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:49:55,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:55,016 INFO L85 PathProgramCache]: Analyzing trace with hash 96885738, now seen corresponding path program 1 times [2024-06-03 18:49:55,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:55,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770672319] [2024-06-03 18:49:55,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:55,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:55,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:55,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:55,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:55,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770672319] [2024-06-03 18:49:55,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770672319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:55,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:55,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:49:55,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643633244] [2024-06-03 18:49:55,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:55,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:49:55,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:55,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:49:55,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:49:55,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:49:55,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 47 transitions, 313 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:55,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:55,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:49:55,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:55,277 INFO L124 PetriNetUnfolderBase]: 104/222 cut-off events. [2024-06-03 18:49:55,277 INFO L125 PetriNetUnfolderBase]: For 916/916 co-relation queries the response was YES. [2024-06-03 18:49:55,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 882 conditions, 222 events. 104/222 cut-off events. For 916/916 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 823 event pairs, 22 based on Foata normal form. 1/222 useless extension candidates. Maximal degree in co-relation 850. Up to 127 conditions per place. [2024-06-03 18:49:55,279 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 38 selfloop transitions, 24 changer transitions 0/66 dead transitions. [2024-06-03 18:49:55,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 66 transitions, 515 flow [2024-06-03 18:49:55,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:49:55,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:49:55,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-03 18:49:55,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-03 18:49:55,281 INFO L175 Difference]: Start difference. First operand has 59 places, 47 transitions, 313 flow. Second operand 7 states and 119 transitions. [2024-06-03 18:49:55,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 66 transitions, 515 flow [2024-06-03 18:49:55,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 66 transitions, 503 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-03 18:49:55,285 INFO L231 Difference]: Finished difference. Result has 64 places, 51 transitions, 382 flow [2024-06-03 18:49:55,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=382, PETRI_PLACES=64, PETRI_TRANSITIONS=51} [2024-06-03 18:49:55,285 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 35 predicate places. [2024-06-03 18:49:55,286 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 51 transitions, 382 flow [2024-06-03 18:49:55,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:55,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:55,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:49:55,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 18:49:55,287 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:49:55,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:55,287 INFO L85 PathProgramCache]: Analyzing trace with hash 100604808, now seen corresponding path program 2 times [2024-06-03 18:49:55,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:55,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818735144] [2024-06-03 18:49:55,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:55,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:55,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:55,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:55,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:55,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818735144] [2024-06-03 18:49:55,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818735144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:55,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:55,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:49:55,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464609068] [2024-06-03 18:49:55,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:55,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:49:55,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:55,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:49:55,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:49:55,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:49:55,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 51 transitions, 382 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:55,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:55,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:49:55,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:55,530 INFO L124 PetriNetUnfolderBase]: 112/239 cut-off events. [2024-06-03 18:49:55,531 INFO L125 PetriNetUnfolderBase]: For 1211/1211 co-relation queries the response was YES. [2024-06-03 18:49:55,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1022 conditions, 239 events. 112/239 cut-off events. For 1211/1211 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 934 event pairs, 22 based on Foata normal form. 1/239 useless extension candidates. Maximal degree in co-relation 989. Up to 163 conditions per place. [2024-06-03 18:49:55,533 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 42 selfloop transitions, 21 changer transitions 0/67 dead transitions. [2024-06-03 18:49:55,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 67 transitions, 588 flow [2024-06-03 18:49:55,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:49:55,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:49:55,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-03 18:49:55,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5523809523809524 [2024-06-03 18:49:55,535 INFO L175 Difference]: Start difference. First operand has 64 places, 51 transitions, 382 flow. Second operand 7 states and 116 transitions. [2024-06-03 18:49:55,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 67 transitions, 588 flow [2024-06-03 18:49:55,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 67 transitions, 554 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-03 18:49:55,539 INFO L231 Difference]: Finished difference. Result has 68 places, 55 transitions, 431 flow [2024-06-03 18:49:55,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=431, PETRI_PLACES=68, PETRI_TRANSITIONS=55} [2024-06-03 18:49:55,540 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 39 predicate places. [2024-06-03 18:49:55,540 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 55 transitions, 431 flow [2024-06-03 18:49:55,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:55,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:55,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:49:55,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 18:49:55,541 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:49:55,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:55,542 INFO L85 PathProgramCache]: Analyzing trace with hash 968081370, now seen corresponding path program 3 times [2024-06-03 18:49:55,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:55,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269406868] [2024-06-03 18:49:55,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:55,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:55,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:55,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:55,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:55,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269406868] [2024-06-03 18:49:55,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269406868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:55,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:55,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:49:55,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001267885] [2024-06-03 18:49:55,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:55,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:49:55,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:55,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:49:55,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:49:55,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:49:55,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 55 transitions, 431 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:55,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:55,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:49:55,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:55,810 INFO L124 PetriNetUnfolderBase]: 110/236 cut-off events. [2024-06-03 18:49:55,810 INFO L125 PetriNetUnfolderBase]: For 1333/1333 co-relation queries the response was YES. [2024-06-03 18:49:55,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1045 conditions, 236 events. 110/236 cut-off events. For 1333/1333 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 915 event pairs, 22 based on Foata normal form. 1/236 useless extension candidates. Maximal degree in co-relation 1010. Up to 161 conditions per place. [2024-06-03 18:49:55,813 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 42 selfloop transitions, 22 changer transitions 0/68 dead transitions. [2024-06-03 18:49:55,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 68 transitions, 589 flow [2024-06-03 18:49:55,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:49:55,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:49:55,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-03 18:49:55,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148148148148148 [2024-06-03 18:49:55,814 INFO L175 Difference]: Start difference. First operand has 68 places, 55 transitions, 431 flow. Second operand 9 states and 139 transitions. [2024-06-03 18:49:55,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 68 transitions, 589 flow [2024-06-03 18:49:55,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 68 transitions, 560 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-03 18:49:55,820 INFO L231 Difference]: Finished difference. Result has 74 places, 55 transitions, 451 flow [2024-06-03 18:49:55,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=451, PETRI_PLACES=74, PETRI_TRANSITIONS=55} [2024-06-03 18:49:55,820 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 45 predicate places. [2024-06-03 18:49:55,821 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 55 transitions, 451 flow [2024-06-03 18:49:55,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:55,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:55,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:49:55,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 18:49:55,822 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:49:55,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:55,822 INFO L85 PathProgramCache]: Analyzing trace with hash -481411332, now seen corresponding path program 4 times [2024-06-03 18:49:55,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:55,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323242044] [2024-06-03 18:49:55,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:55,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:55,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:55,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:55,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:55,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323242044] [2024-06-03 18:49:55,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323242044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:55,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:55,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:49:55,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826197232] [2024-06-03 18:49:55,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:55,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:49:55,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:55,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:49:55,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:49:55,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:49:55,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 55 transitions, 451 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:55,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:55,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:49:55,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:56,087 INFO L124 PetriNetUnfolderBase]: 118/253 cut-off events. [2024-06-03 18:49:56,087 INFO L125 PetriNetUnfolderBase]: For 1607/1607 co-relation queries the response was YES. [2024-06-03 18:49:56,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1168 conditions, 253 events. 118/253 cut-off events. For 1607/1607 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1009 event pairs, 22 based on Foata normal form. 1/253 useless extension candidates. Maximal degree in co-relation 1131. Up to 151 conditions per place. [2024-06-03 18:49:56,090 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 40 selfloop transitions, 32 changer transitions 0/76 dead transitions. [2024-06-03 18:49:56,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 76 transitions, 719 flow [2024-06-03 18:49:56,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:49:56,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:49:56,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 18:49:56,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5541666666666667 [2024-06-03 18:49:56,091 INFO L175 Difference]: Start difference. First operand has 74 places, 55 transitions, 451 flow. Second operand 8 states and 133 transitions. [2024-06-03 18:49:56,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 76 transitions, 719 flow [2024-06-03 18:49:56,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 76 transitions, 670 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-03 18:49:56,098 INFO L231 Difference]: Finished difference. Result has 74 places, 59 transitions, 510 flow [2024-06-03 18:49:56,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=510, PETRI_PLACES=74, PETRI_TRANSITIONS=59} [2024-06-03 18:49:56,099 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 45 predicate places. [2024-06-03 18:49:56,099 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 59 transitions, 510 flow [2024-06-03 18:49:56,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:56,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:56,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:49:56,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 18:49:56,100 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:49:56,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:56,100 INFO L85 PathProgramCache]: Analyzing trace with hash -481416912, now seen corresponding path program 5 times [2024-06-03 18:49:56,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:56,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640309999] [2024-06-03 18:49:56,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:56,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:56,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:56,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:56,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:56,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640309999] [2024-06-03 18:49:56,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640309999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:56,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:56,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:49:56,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356753898] [2024-06-03 18:49:56,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:56,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:49:56,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:56,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:49:56,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:49:56,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:49:56,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 59 transitions, 510 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:56,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:56,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:49:56,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:56,348 INFO L124 PetriNetUnfolderBase]: 116/250 cut-off events. [2024-06-03 18:49:56,348 INFO L125 PetriNetUnfolderBase]: For 1773/1773 co-relation queries the response was YES. [2024-06-03 18:49:56,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1186 conditions, 250 events. 116/250 cut-off events. For 1773/1773 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 998 event pairs, 22 based on Foata normal form. 1/250 useless extension candidates. Maximal degree in co-relation 1148. Up to 149 conditions per place. [2024-06-03 18:49:56,351 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 39 selfloop transitions, 30 changer transitions 0/73 dead transitions. [2024-06-03 18:49:56,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 73 transitions, 708 flow [2024-06-03 18:49:56,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:49:56,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:49:56,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-03 18:49:56,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888888888888889 [2024-06-03 18:49:56,352 INFO L175 Difference]: Start difference. First operand has 74 places, 59 transitions, 510 flow. Second operand 6 states and 106 transitions. [2024-06-03 18:49:56,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 73 transitions, 708 flow [2024-06-03 18:49:56,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 73 transitions, 629 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 18:49:56,358 INFO L231 Difference]: Finished difference. Result has 74 places, 59 transitions, 501 flow [2024-06-03 18:49:56,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=501, PETRI_PLACES=74, PETRI_TRANSITIONS=59} [2024-06-03 18:49:56,359 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 45 predicate places. [2024-06-03 18:49:56,359 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 59 transitions, 501 flow [2024-06-03 18:49:56,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:56,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:56,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:49:56,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 18:49:56,360 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:49:56,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:56,361 INFO L85 PathProgramCache]: Analyzing trace with hash -474059682, now seen corresponding path program 6 times [2024-06-03 18:49:56,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:56,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173810976] [2024-06-03 18:49:56,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:56,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:56,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:56,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:56,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:56,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173810976] [2024-06-03 18:49:56,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173810976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:56,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:56,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:49:56,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238471184] [2024-06-03 18:49:56,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:56,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:49:56,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:56,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:49:56,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:49:56,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:49:56,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 59 transitions, 501 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:56,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:56,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:49:56,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:56,613 INFO L124 PetriNetUnfolderBase]: 114/247 cut-off events. [2024-06-03 18:49:56,614 INFO L125 PetriNetUnfolderBase]: For 1649/1649 co-relation queries the response was YES. [2024-06-03 18:49:56,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1150 conditions, 247 events. 114/247 cut-off events. For 1649/1649 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 989 event pairs, 22 based on Foata normal form. 1/247 useless extension candidates. Maximal degree in co-relation 1112. Up to 171 conditions per place. [2024-06-03 18:49:56,616 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 50 selfloop transitions, 17 changer transitions 0/71 dead transitions. [2024-06-03 18:49:56,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 71 transitions, 665 flow [2024-06-03 18:49:56,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:49:56,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:49:56,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-03 18:49:56,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6133333333333333 [2024-06-03 18:49:56,617 INFO L175 Difference]: Start difference. First operand has 74 places, 59 transitions, 501 flow. Second operand 5 states and 92 transitions. [2024-06-03 18:49:56,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 71 transitions, 665 flow [2024-06-03 18:49:56,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 71 transitions, 598 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 18:49:56,624 INFO L231 Difference]: Finished difference. Result has 73 places, 59 transitions, 479 flow [2024-06-03 18:49:56,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=479, PETRI_PLACES=73, PETRI_TRANSITIONS=59} [2024-06-03 18:49:56,624 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 44 predicate places. [2024-06-03 18:49:56,624 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 59 transitions, 479 flow [2024-06-03 18:49:56,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:56,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:56,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:49:56,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 18:49:56,625 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:49:56,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:56,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1294370739, now seen corresponding path program 1 times [2024-06-03 18:49:56,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:56,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759714382] [2024-06-03 18:49:56,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:56,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:56,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:56,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:56,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:56,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759714382] [2024-06-03 18:49:56,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759714382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:56,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:56,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:49:56,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785086058] [2024-06-03 18:49:56,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:56,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:49:56,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:56,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:49:56,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:49:56,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:49:56,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 59 transitions, 479 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:56,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:56,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:49:56,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:56,914 INFO L124 PetriNetUnfolderBase]: 118/255 cut-off events. [2024-06-03 18:49:56,914 INFO L125 PetriNetUnfolderBase]: For 1702/1702 co-relation queries the response was YES. [2024-06-03 18:49:56,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1153 conditions, 255 events. 118/255 cut-off events. For 1702/1702 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1019 event pairs, 8 based on Foata normal form. 2/256 useless extension candidates. Maximal degree in co-relation 1115. Up to 140 conditions per place. [2024-06-03 18:49:56,917 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 54 selfloop transitions, 19 changer transitions 0/77 dead transitions. [2024-06-03 18:49:56,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 77 transitions, 695 flow [2024-06-03 18:49:56,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:49:56,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:49:56,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-03 18:49:56,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-03 18:49:56,918 INFO L175 Difference]: Start difference. First operand has 73 places, 59 transitions, 479 flow. Second operand 7 states and 115 transitions. [2024-06-03 18:49:56,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 77 transitions, 695 flow [2024-06-03 18:49:56,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 77 transitions, 646 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 18:49:56,927 INFO L231 Difference]: Finished difference. Result has 75 places, 60 transitions, 476 flow [2024-06-03 18:49:56,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=476, PETRI_PLACES=75, PETRI_TRANSITIONS=60} [2024-06-03 18:49:56,928 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 46 predicate places. [2024-06-03 18:49:56,928 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 60 transitions, 476 flow [2024-06-03 18:49:56,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:56,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:56,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:49:56,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 18:49:56,929 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:49:56,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:56,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1294310289, now seen corresponding path program 2 times [2024-06-03 18:49:56,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:56,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735291634] [2024-06-03 18:49:56,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:56,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:56,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:57,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:57,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:57,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735291634] [2024-06-03 18:49:57,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735291634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:57,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:57,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:49:57,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127516107] [2024-06-03 18:49:57,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:57,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:49:57,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:57,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:49:57,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:49:57,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:49:57,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 60 transitions, 476 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:57,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:57,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:49:57,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:57,180 INFO L124 PetriNetUnfolderBase]: 122/263 cut-off events. [2024-06-03 18:49:57,181 INFO L125 PetriNetUnfolderBase]: For 1860/1860 co-relation queries the response was YES. [2024-06-03 18:49:57,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1191 conditions, 263 events. 122/263 cut-off events. For 1860/1860 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1065 event pairs, 19 based on Foata normal form. 2/264 useless extension candidates. Maximal degree in co-relation 1153. Up to 181 conditions per place. [2024-06-03 18:49:57,183 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 54 selfloop transitions, 18 changer transitions 0/76 dead transitions. [2024-06-03 18:49:57,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 76 transitions, 662 flow [2024-06-03 18:49:57,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:49:57,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:49:57,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-03 18:49:57,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-03 18:49:57,184 INFO L175 Difference]: Start difference. First operand has 75 places, 60 transitions, 476 flow. Second operand 7 states and 115 transitions. [2024-06-03 18:49:57,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 76 transitions, 662 flow [2024-06-03 18:49:57,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 76 transitions, 625 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-03 18:49:57,194 INFO L231 Difference]: Finished difference. Result has 78 places, 61 transitions, 487 flow [2024-06-03 18:49:57,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=487, PETRI_PLACES=78, PETRI_TRANSITIONS=61} [2024-06-03 18:49:57,194 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 49 predicate places. [2024-06-03 18:49:57,194 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 61 transitions, 487 flow [2024-06-03 18:49:57,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:57,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:57,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:49:57,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 18:49:57,195 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:49:57,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:57,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1176222609, now seen corresponding path program 3 times [2024-06-03 18:49:57,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:57,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202878088] [2024-06-03 18:49:57,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:57,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:57,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:57,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:57,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202878088] [2024-06-03 18:49:57,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202878088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:57,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:57,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:49:57,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154327322] [2024-06-03 18:49:57,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:57,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:49:57,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:57,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:49:57,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:49:57,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:49:57,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 61 transitions, 487 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:57,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:57,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:49:57,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:57,485 INFO L124 PetriNetUnfolderBase]: 126/271 cut-off events. [2024-06-03 18:49:57,485 INFO L125 PetriNetUnfolderBase]: For 2039/2039 co-relation queries the response was YES. [2024-06-03 18:49:57,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1223 conditions, 271 events. 126/271 cut-off events. For 2039/2039 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1106 event pairs, 19 based on Foata normal form. 2/272 useless extension candidates. Maximal degree in co-relation 1184. Up to 204 conditions per place. [2024-06-03 18:49:57,488 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 57 selfloop transitions, 13 changer transitions 0/74 dead transitions. [2024-06-03 18:49:57,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 74 transitions, 660 flow [2024-06-03 18:49:57,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:49:57,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:49:57,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-03 18:49:57,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-06-03 18:49:57,489 INFO L175 Difference]: Start difference. First operand has 78 places, 61 transitions, 487 flow. Second operand 7 states and 111 transitions. [2024-06-03 18:49:57,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 74 transitions, 660 flow [2024-06-03 18:49:57,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 74 transitions, 624 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-03 18:49:57,496 INFO L231 Difference]: Finished difference. Result has 80 places, 62 transitions, 488 flow [2024-06-03 18:49:57,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=488, PETRI_PLACES=80, PETRI_TRANSITIONS=62} [2024-06-03 18:49:57,497 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 51 predicate places. [2024-06-03 18:49:57,497 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 62 transitions, 488 flow [2024-06-03 18:49:57,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:57,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:57,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:49:57,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 18:49:57,498 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:49:57,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:57,498 INFO L85 PathProgramCache]: Analyzing trace with hash -54241245, now seen corresponding path program 1 times [2024-06-03 18:49:57,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:57,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093944612] [2024-06-03 18:49:57,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:57,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:57,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:57,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:57,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:57,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093944612] [2024-06-03 18:49:57,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093944612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:57,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:57,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:49:57,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343277959] [2024-06-03 18:49:57,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:57,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:49:57,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:57,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:49:57,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:49:57,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:49:57,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 62 transitions, 488 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:57,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:57,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:49:57,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:57,743 INFO L124 PetriNetUnfolderBase]: 130/279 cut-off events. [2024-06-03 18:49:57,743 INFO L125 PetriNetUnfolderBase]: For 2232/2232 co-relation queries the response was YES. [2024-06-03 18:49:57,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1253 conditions, 279 events. 130/279 cut-off events. For 2232/2232 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1150 event pairs, 20 based on Foata normal form. 2/280 useless extension candidates. Maximal degree in co-relation 1213. Up to 203 conditions per place. [2024-06-03 18:49:57,746 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 54 selfloop transitions, 17 changer transitions 0/75 dead transitions. [2024-06-03 18:49:57,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 75 transitions, 664 flow [2024-06-03 18:49:57,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:49:57,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:49:57,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-03 18:49:57,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5380952380952381 [2024-06-03 18:49:57,748 INFO L175 Difference]: Start difference. First operand has 80 places, 62 transitions, 488 flow. Second operand 7 states and 113 transitions. [2024-06-03 18:49:57,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 75 transitions, 664 flow [2024-06-03 18:49:57,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 75 transitions, 638 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-03 18:49:57,759 INFO L231 Difference]: Finished difference. Result has 82 places, 63 transitions, 508 flow [2024-06-03 18:49:57,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=508, PETRI_PLACES=82, PETRI_TRANSITIONS=63} [2024-06-03 18:49:57,760 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 53 predicate places. [2024-06-03 18:49:57,760 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 63 transitions, 508 flow [2024-06-03 18:49:57,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:57,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:57,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:49:57,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 18:49:57,762 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:49:57,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:57,777 INFO L85 PathProgramCache]: Analyzing trace with hash -2039026745, now seen corresponding path program 4 times [2024-06-03 18:49:57,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:57,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678488710] [2024-06-03 18:49:57,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:57,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:57,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:57,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:57,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:57,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678488710] [2024-06-03 18:49:57,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678488710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:57,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:57,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:49:57,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892717295] [2024-06-03 18:49:57,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:57,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:49:57,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:57,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:49:57,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:49:57,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:49:57,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 63 transitions, 508 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:57,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:57,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:49:57,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:58,049 INFO L124 PetriNetUnfolderBase]: 127/274 cut-off events. [2024-06-03 18:49:58,049 INFO L125 PetriNetUnfolderBase]: For 2204/2204 co-relation queries the response was YES. [2024-06-03 18:49:58,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1234 conditions, 274 events. 127/274 cut-off events. For 2204/2204 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1131 event pairs, 7 based on Foata normal form. 2/275 useless extension candidates. Maximal degree in co-relation 1193. Up to 171 conditions per place. [2024-06-03 18:49:58,052 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 55 selfloop transitions, 18 changer transitions 0/77 dead transitions. [2024-06-03 18:49:58,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 77 transitions, 688 flow [2024-06-03 18:49:58,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:49:58,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:49:58,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-03 18:49:58,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-03 18:49:58,053 INFO L175 Difference]: Start difference. First operand has 82 places, 63 transitions, 508 flow. Second operand 6 states and 102 transitions. [2024-06-03 18:49:58,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 77 transitions, 688 flow [2024-06-03 18:49:58,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 77 transitions, 652 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-03 18:49:58,063 INFO L231 Difference]: Finished difference. Result has 83 places, 63 transitions, 516 flow [2024-06-03 18:49:58,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=516, PETRI_PLACES=83, PETRI_TRANSITIONS=63} [2024-06-03 18:49:58,064 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 54 predicate places. [2024-06-03 18:49:58,064 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 63 transitions, 516 flow [2024-06-03 18:49:58,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:58,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:58,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:49:58,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 18:49:58,065 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:49:58,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:58,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1802666687, now seen corresponding path program 2 times [2024-06-03 18:49:58,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:58,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878045939] [2024-06-03 18:49:58,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:58,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:58,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:58,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:58,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:58,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878045939] [2024-06-03 18:49:58,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878045939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:58,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:58,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:49:58,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385439855] [2024-06-03 18:49:58,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:58,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:49:58,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:58,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:49:58,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:49:58,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:49:58,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 63 transitions, 516 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:58,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:58,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:49:58,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:58,339 INFO L124 PetriNetUnfolderBase]: 131/282 cut-off events. [2024-06-03 18:49:58,340 INFO L125 PetriNetUnfolderBase]: For 2516/2516 co-relation queries the response was YES. [2024-06-03 18:49:58,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1288 conditions, 282 events. 131/282 cut-off events. For 2516/2516 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1171 event pairs, 21 based on Foata normal form. 2/283 useless extension candidates. Maximal degree in co-relation 1246. Up to 212 conditions per place. [2024-06-03 18:49:58,342 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 57 selfloop transitions, 13 changer transitions 0/74 dead transitions. [2024-06-03 18:49:58,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 74 transitions, 688 flow [2024-06-03 18:49:58,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:49:58,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:49:58,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-03 18:49:58,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-06-03 18:49:58,344 INFO L175 Difference]: Start difference. First operand has 83 places, 63 transitions, 516 flow. Second operand 5 states and 87 transitions. [2024-06-03 18:49:58,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 74 transitions, 688 flow [2024-06-03 18:49:58,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 74 transitions, 642 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 18:49:58,352 INFO L231 Difference]: Finished difference. Result has 82 places, 64 transitions, 510 flow [2024-06-03 18:49:58,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=510, PETRI_PLACES=82, PETRI_TRANSITIONS=64} [2024-06-03 18:49:58,353 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 53 predicate places. [2024-06-03 18:49:58,353 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 64 transitions, 510 flow [2024-06-03 18:49:58,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:58,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:58,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:49:58,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 18:49:58,354 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:49:58,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:58,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1802370017, now seen corresponding path program 3 times [2024-06-03 18:49:58,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:58,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007020880] [2024-06-03 18:49:58,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:58,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:58,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:58,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:58,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:58,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007020880] [2024-06-03 18:49:58,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007020880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:58,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:58,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:49:58,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451157724] [2024-06-03 18:49:58,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:58,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:49:58,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:58,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:49:58,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:49:58,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:49:58,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 64 transitions, 510 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:58,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:58,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:49:58,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:58,617 INFO L124 PetriNetUnfolderBase]: 135/290 cut-off events. [2024-06-03 18:49:58,617 INFO L125 PetriNetUnfolderBase]: For 2260/2260 co-relation queries the response was YES. [2024-06-03 18:49:58,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1293 conditions, 290 events. 135/290 cut-off events. For 2260/2260 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1219 event pairs, 19 based on Foata normal form. 2/291 useless extension candidates. Maximal degree in co-relation 1251. Up to 206 conditions per place. [2024-06-03 18:49:58,620 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 58 selfloop transitions, 15 changer transitions 0/77 dead transitions. [2024-06-03 18:49:58,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 77 transitions, 694 flow [2024-06-03 18:49:58,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:49:58,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:49:58,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-03 18:49:58,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-03 18:49:58,621 INFO L175 Difference]: Start difference. First operand has 82 places, 64 transitions, 510 flow. Second operand 6 states and 100 transitions. [2024-06-03 18:49:58,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 77 transitions, 694 flow [2024-06-03 18:49:58,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 77 transitions, 664 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-03 18:49:58,629 INFO L231 Difference]: Finished difference. Result has 85 places, 65 transitions, 526 flow [2024-06-03 18:49:58,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=526, PETRI_PLACES=85, PETRI_TRANSITIONS=65} [2024-06-03 18:49:58,630 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 56 predicate places. [2024-06-03 18:49:58,630 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 65 transitions, 526 flow [2024-06-03 18:49:58,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:58,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:58,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:49:58,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 18:49:58,631 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:49:58,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:58,632 INFO L85 PathProgramCache]: Analyzing trace with hash -2038842047, now seen corresponding path program 4 times [2024-06-03 18:49:58,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:58,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224885265] [2024-06-03 18:49:58,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:58,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:58,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:58,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:58,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224885265] [2024-06-03 18:49:58,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224885265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:58,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:58,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:49:58,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497913658] [2024-06-03 18:49:58,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:58,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:49:58,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:58,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:49:58,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:49:58,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:49:58,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 65 transitions, 526 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:58,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:58,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:49:58,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:58,855 INFO L124 PetriNetUnfolderBase]: 132/285 cut-off events. [2024-06-03 18:49:58,855 INFO L125 PetriNetUnfolderBase]: For 2170/2170 co-relation queries the response was YES. [2024-06-03 18:49:58,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1256 conditions, 285 events. 132/285 cut-off events. For 2170/2170 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1192 event pairs, 20 based on Foata normal form. 2/286 useless extension candidates. Maximal degree in co-relation 1213. Up to 203 conditions per place. [2024-06-03 18:49:58,858 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 54 selfloop transitions, 18 changer transitions 0/76 dead transitions. [2024-06-03 18:49:58,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 76 transitions, 696 flow [2024-06-03 18:49:58,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:49:58,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:49:58,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-03 18:49:58,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-03 18:49:58,860 INFO L175 Difference]: Start difference. First operand has 85 places, 65 transitions, 526 flow. Second operand 6 states and 100 transitions. [2024-06-03 18:49:58,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 76 transitions, 696 flow [2024-06-03 18:49:58,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 76 transitions, 660 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-03 18:49:58,870 INFO L231 Difference]: Finished difference. Result has 87 places, 65 transitions, 532 flow [2024-06-03 18:49:58,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=532, PETRI_PLACES=87, PETRI_TRANSITIONS=65} [2024-06-03 18:49:58,871 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 58 predicate places. [2024-06-03 18:49:58,871 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 65 transitions, 532 flow [2024-06-03 18:49:58,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:58,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:58,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:49:58,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 18:49:58,872 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:49:58,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:58,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1470786677, now seen corresponding path program 1 times [2024-06-03 18:49:58,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:58,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681074477] [2024-06-03 18:49:58,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:58,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:58,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:59,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:59,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:59,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681074477] [2024-06-03 18:49:59,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681074477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:59,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:59,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:49:59,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412839002] [2024-06-03 18:49:59,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:59,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:49:59,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:59,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:49:59,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:49:59,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:49:59,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 65 transitions, 532 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:59,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:59,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:49:59,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:59,128 INFO L124 PetriNetUnfolderBase]: 155/342 cut-off events. [2024-06-03 18:49:59,129 INFO L125 PetriNetUnfolderBase]: For 4150/4150 co-relation queries the response was YES. [2024-06-03 18:49:59,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1513 conditions, 342 events. 155/342 cut-off events. For 4150/4150 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1514 event pairs, 29 based on Foata normal form. 6/347 useless extension candidates. Maximal degree in co-relation 1469. Up to 118 conditions per place. [2024-06-03 18:49:59,133 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 43 selfloop transitions, 29 changer transitions 12/88 dead transitions. [2024-06-03 18:49:59,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 88 transitions, 800 flow [2024-06-03 18:49:59,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:49:59,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:49:59,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-03 18:49:59,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-03 18:49:59,134 INFO L175 Difference]: Start difference. First operand has 87 places, 65 transitions, 532 flow. Second operand 8 states and 134 transitions. [2024-06-03 18:49:59,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 88 transitions, 800 flow [2024-06-03 18:49:59,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 88 transitions, 742 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-03 18:49:59,145 INFO L231 Difference]: Finished difference. Result has 90 places, 62 transitions, 512 flow [2024-06-03 18:49:59,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=512, PETRI_PLACES=90, PETRI_TRANSITIONS=62} [2024-06-03 18:49:59,146 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 61 predicate places. [2024-06-03 18:49:59,146 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 62 transitions, 512 flow [2024-06-03 18:49:59,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:59,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:59,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:49:59,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 18:49:59,147 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:49:59,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:59,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1382073047, now seen corresponding path program 2 times [2024-06-03 18:49:59,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:59,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045370141] [2024-06-03 18:49:59,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:59,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:59,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:59,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:59,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:59,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045370141] [2024-06-03 18:49:59,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045370141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:59,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:59,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:49:59,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011449593] [2024-06-03 18:49:59,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:59,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:49:59,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:59,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:49:59,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:49:59,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:49:59,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 62 transitions, 512 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:59,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:59,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:49:59,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:59,406 INFO L124 PetriNetUnfolderBase]: 143/320 cut-off events. [2024-06-03 18:49:59,407 INFO L125 PetriNetUnfolderBase]: For 4487/4487 co-relation queries the response was YES. [2024-06-03 18:49:59,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1420 conditions, 320 events. 143/320 cut-off events. For 4487/4487 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1444 event pairs, 35 based on Foata normal form. 8/327 useless extension candidates. Maximal degree in co-relation 1375. Up to 178 conditions per place. [2024-06-03 18:49:59,410 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 37 selfloop transitions, 28 changer transitions 9/78 dead transitions. [2024-06-03 18:49:59,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 78 transitions, 706 flow [2024-06-03 18:49:59,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:49:59,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:49:59,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-03 18:49:59,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-03 18:49:59,411 INFO L175 Difference]: Start difference. First operand has 90 places, 62 transitions, 512 flow. Second operand 8 states and 129 transitions. [2024-06-03 18:49:59,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 78 transitions, 706 flow [2024-06-03 18:49:59,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 78 transitions, 642 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-03 18:49:59,421 INFO L231 Difference]: Finished difference. Result has 87 places, 59 transitions, 489 flow [2024-06-03 18:49:59,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=489, PETRI_PLACES=87, PETRI_TRANSITIONS=59} [2024-06-03 18:49:59,422 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 58 predicate places. [2024-06-03 18:49:59,422 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 59 transitions, 489 flow [2024-06-03 18:49:59,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:59,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:59,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:49:59,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 18:49:59,423 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:49:59,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:59,423 INFO L85 PathProgramCache]: Analyzing trace with hash -966262639, now seen corresponding path program 3 times [2024-06-03 18:49:59,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:59,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928736913] [2024-06-03 18:49:59,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:59,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:59,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:59,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:59,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:59,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928736913] [2024-06-03 18:49:59,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928736913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:59,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:59,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:49:59,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210037161] [2024-06-03 18:49:59,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:59,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:49:59,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:59,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:49:59,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:49:59,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:49:59,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 59 transitions, 489 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:59,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:59,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:49:59,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:59,680 INFO L124 PetriNetUnfolderBase]: 134/303 cut-off events. [2024-06-03 18:49:59,680 INFO L125 PetriNetUnfolderBase]: For 3364/3364 co-relation queries the response was YES. [2024-06-03 18:49:59,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1327 conditions, 303 events. 134/303 cut-off events. For 3364/3364 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1319 event pairs, 29 based on Foata normal form. 6/308 useless extension candidates. Maximal degree in co-relation 1284. Up to 168 conditions per place. [2024-06-03 18:49:59,683 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 32 selfloop transitions, 25 changer transitions 14/75 dead transitions. [2024-06-03 18:49:59,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 75 transitions, 671 flow [2024-06-03 18:49:59,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:49:59,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:49:59,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-03 18:49:59,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2024-06-03 18:49:59,684 INFO L175 Difference]: Start difference. First operand has 87 places, 59 transitions, 489 flow. Second operand 8 states and 127 transitions. [2024-06-03 18:49:59,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 75 transitions, 671 flow [2024-06-03 18:49:59,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 75 transitions, 611 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 18:49:59,693 INFO L231 Difference]: Finished difference. Result has 85 places, 55 transitions, 443 flow [2024-06-03 18:49:59,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=443, PETRI_PLACES=85, PETRI_TRANSITIONS=55} [2024-06-03 18:49:59,697 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 56 predicate places. [2024-06-03 18:49:59,697 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 55 transitions, 443 flow [2024-06-03 18:49:59,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:59,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:59,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:49:59,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 18:49:59,698 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:49:59,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:59,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1687055795, now seen corresponding path program 4 times [2024-06-03 18:49:59,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:59,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818480439] [2024-06-03 18:49:59,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:59,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:59,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:59,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:59,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:59,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818480439] [2024-06-03 18:49:59,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818480439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:59,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:59,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:49:59,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859338030] [2024-06-03 18:49:59,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:59,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:49:59,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:59,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:49:59,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:49:59,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:49:59,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 55 transitions, 443 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:59,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:59,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:49:59,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:59,950 INFO L124 PetriNetUnfolderBase]: 127/280 cut-off events. [2024-06-03 18:49:59,951 INFO L125 PetriNetUnfolderBase]: For 3303/3307 co-relation queries the response was YES. [2024-06-03 18:49:59,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1215 conditions, 280 events. 127/280 cut-off events. For 3303/3307 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1208 event pairs, 33 based on Foata normal form. 12/291 useless extension candidates. Maximal degree in co-relation 1173. Up to 176 conditions per place. [2024-06-03 18:49:59,953 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 38 selfloop transitions, 17 changer transitions 9/68 dead transitions. [2024-06-03 18:49:59,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 68 transitions, 607 flow [2024-06-03 18:49:59,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:49:59,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:49:59,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-03 18:49:59,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-03 18:49:59,954 INFO L175 Difference]: Start difference. First operand has 85 places, 55 transitions, 443 flow. Second operand 8 states and 126 transitions. [2024-06-03 18:49:59,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 68 transitions, 607 flow [2024-06-03 18:49:59,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 68 transitions, 547 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-03 18:49:59,961 INFO L231 Difference]: Finished difference. Result has 80 places, 52 transitions, 394 flow [2024-06-03 18:49:59,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=394, PETRI_PLACES=80, PETRI_TRANSITIONS=52} [2024-06-03 18:49:59,963 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 51 predicate places. [2024-06-03 18:49:59,964 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 52 transitions, 394 flow [2024-06-03 18:49:59,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:59,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:59,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:49:59,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 18:49:59,964 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:49:59,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:59,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1681687463, now seen corresponding path program 1 times [2024-06-03 18:49:59,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:59,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667071047] [2024-06-03 18:49:59,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:59,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:59,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:00,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:00,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:00,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667071047] [2024-06-03 18:50:00,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667071047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:00,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:00,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:50:00,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488880361] [2024-06-03 18:50:00,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:00,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:50:00,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:00,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:50:00,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:50:00,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:50:00,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 52 transitions, 394 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:00,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:00,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:50:00,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:00,248 INFO L124 PetriNetUnfolderBase]: 122/275 cut-off events. [2024-06-03 18:50:00,249 INFO L125 PetriNetUnfolderBase]: For 2571/2571 co-relation queries the response was YES. [2024-06-03 18:50:00,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1129 conditions, 275 events. 122/275 cut-off events. For 2571/2571 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1194 event pairs, 35 based on Foata normal form. 8/282 useless extension candidates. Maximal degree in co-relation 1089. Up to 172 conditions per place. [2024-06-03 18:50:00,251 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 38 selfloop transitions, 15 changer transitions 9/66 dead transitions. [2024-06-03 18:50:00,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 66 transitions, 556 flow [2024-06-03 18:50:00,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:50:00,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:50:00,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-03 18:50:00,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5037037037037037 [2024-06-03 18:50:00,253 INFO L175 Difference]: Start difference. First operand has 80 places, 52 transitions, 394 flow. Second operand 9 states and 136 transitions. [2024-06-03 18:50:00,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 66 transitions, 556 flow [2024-06-03 18:50:00,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 66 transitions, 516 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 18:50:00,259 INFO L231 Difference]: Finished difference. Result has 80 places, 49 transitions, 363 flow [2024-06-03 18:50:00,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=363, PETRI_PLACES=80, PETRI_TRANSITIONS=49} [2024-06-03 18:50:00,260 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 51 predicate places. [2024-06-03 18:50:00,260 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 49 transitions, 363 flow [2024-06-03 18:50:00,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:00,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:00,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:00,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 18:50:00,261 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:50:00,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:00,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1700468921, now seen corresponding path program 2 times [2024-06-03 18:50:00,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:00,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663961832] [2024-06-03 18:50:00,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:00,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:00,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:00,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:00,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:00,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663961832] [2024-06-03 18:50:00,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663961832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:00,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:00,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:50:00,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411217999] [2024-06-03 18:50:00,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:00,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:50:00,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:00,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:50:00,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:50:00,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:50:00,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 49 transitions, 363 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:00,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:00,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:50:00,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:00,578 INFO L124 PetriNetUnfolderBase]: 113/262 cut-off events. [2024-06-03 18:50:00,578 INFO L125 PetriNetUnfolderBase]: For 2323/2323 co-relation queries the response was YES. [2024-06-03 18:50:00,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1063 conditions, 262 events. 113/262 cut-off events. For 2323/2323 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1104 event pairs, 31 based on Foata normal form. 6/267 useless extension candidates. Maximal degree in co-relation 1023. Up to 162 conditions per place. [2024-06-03 18:50:00,580 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 36 selfloop transitions, 13 changer transitions 10/63 dead transitions. [2024-06-03 18:50:00,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 63 transitions, 515 flow [2024-06-03 18:50:00,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:50:00,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:50:00,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-03 18:50:00,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4962962962962963 [2024-06-03 18:50:00,582 INFO L175 Difference]: Start difference. First operand has 80 places, 49 transitions, 363 flow. Second operand 9 states and 134 transitions. [2024-06-03 18:50:00,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 63 transitions, 515 flow [2024-06-03 18:50:00,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 63 transitions, 470 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 18:50:00,588 INFO L231 Difference]: Finished difference. Result has 78 places, 46 transitions, 322 flow [2024-06-03 18:50:00,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=322, PETRI_PLACES=78, PETRI_TRANSITIONS=46} [2024-06-03 18:50:00,589 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 49 predicate places. [2024-06-03 18:50:00,589 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 46 transitions, 322 flow [2024-06-03 18:50:00,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:00,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:00,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:00,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 18:50:00,590 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:50:00,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:00,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1694743469, now seen corresponding path program 5 times [2024-06-03 18:50:00,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:00,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92558335] [2024-06-03 18:50:00,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:00,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:00,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:00,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:00,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:00,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92558335] [2024-06-03 18:50:00,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92558335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:00,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:00,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:50:00,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016297299] [2024-06-03 18:50:00,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:00,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:50:00,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:00,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:50:00,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:50:00,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:50:00,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 46 transitions, 322 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:00,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:00,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:50:00,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:00,901 INFO L124 PetriNetUnfolderBase]: 106/243 cut-off events. [2024-06-03 18:50:00,901 INFO L125 PetriNetUnfolderBase]: For 2297/2297 co-relation queries the response was YES. [2024-06-03 18:50:00,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 980 conditions, 243 events. 106/243 cut-off events. For 2297/2297 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 988 event pairs, 29 based on Foata normal form. 6/248 useless extension candidates. Maximal degree in co-relation 941. Up to 152 conditions per place. [2024-06-03 18:50:00,903 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 30 selfloop transitions, 9 changer transitions 16/59 dead transitions. [2024-06-03 18:50:00,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 59 transitions, 464 flow [2024-06-03 18:50:00,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:50:00,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:50:00,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-03 18:50:00,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5041666666666667 [2024-06-03 18:50:00,905 INFO L175 Difference]: Start difference. First operand has 78 places, 46 transitions, 322 flow. Second operand 8 states and 121 transitions. [2024-06-03 18:50:00,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 59 transitions, 464 flow [2024-06-03 18:50:00,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 59 transitions, 425 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-03 18:50:00,910 INFO L231 Difference]: Finished difference. Result has 73 places, 41 transitions, 258 flow [2024-06-03 18:50:00,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=258, PETRI_PLACES=73, PETRI_TRANSITIONS=41} [2024-06-03 18:50:00,912 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 44 predicate places. [2024-06-03 18:50:00,912 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 41 transitions, 258 flow [2024-06-03 18:50:00,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:00,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:00,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:00,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 18:50:00,913 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:50:00,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:00,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1672461945, now seen corresponding path program 3 times [2024-06-03 18:50:00,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:00,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636250656] [2024-06-03 18:50:00,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:00,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:00,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:01,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:01,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:01,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636250656] [2024-06-03 18:50:01,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636250656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:01,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:01,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:50:01,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683160052] [2024-06-03 18:50:01,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:01,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:50:01,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:01,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:50:01,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:50:01,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:50:01,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 41 transitions, 258 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:01,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:01,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:50:01,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:01,195 INFO L124 PetriNetUnfolderBase]: 98/222 cut-off events. [2024-06-03 18:50:01,195 INFO L125 PetriNetUnfolderBase]: For 2343/2351 co-relation queries the response was YES. [2024-06-03 18:50:01,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 866 conditions, 222 events. 98/222 cut-off events. For 2343/2351 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 916 event pairs, 35 based on Foata normal form. 16/238 useless extension candidates. Maximal degree in co-relation 828. Up to 136 conditions per place. [2024-06-03 18:50:01,197 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 23 selfloop transitions, 14 changer transitions 9/50 dead transitions. [2024-06-03 18:50:01,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 50 transitions, 376 flow [2024-06-03 18:50:01,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:50:01,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:50:01,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-03 18:50:01,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-06-03 18:50:01,198 INFO L175 Difference]: Start difference. First operand has 73 places, 41 transitions, 258 flow. Second operand 7 states and 108 transitions. [2024-06-03 18:50:01,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 50 transitions, 376 flow [2024-06-03 18:50:01,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 50 transitions, 345 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-03 18:50:01,203 INFO L231 Difference]: Finished difference. Result has 64 places, 38 transitions, 237 flow [2024-06-03 18:50:01,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=237, PETRI_PLACES=64, PETRI_TRANSITIONS=38} [2024-06-03 18:50:01,204 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 35 predicate places. [2024-06-03 18:50:01,205 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 38 transitions, 237 flow [2024-06-03 18:50:01,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:01,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:01,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:01,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 18:50:01,205 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:50:01,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:01,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1401024925, now seen corresponding path program 4 times [2024-06-03 18:50:01,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:01,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93151178] [2024-06-03 18:50:01,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:01,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:01,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:01,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:01,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:01,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93151178] [2024-06-03 18:50:01,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93151178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:01,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:01,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:50:01,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383472982] [2024-06-03 18:50:01,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:01,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:50:01,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:01,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:50:01,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:50:01,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:50:01,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 38 transitions, 237 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:01,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:01,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:50:01,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:01,482 INFO L124 PetriNetUnfolderBase]: 93/215 cut-off events. [2024-06-03 18:50:01,482 INFO L125 PetriNetUnfolderBase]: For 2029/2029 co-relation queries the response was YES. [2024-06-03 18:50:01,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 816 conditions, 215 events. 93/215 cut-off events. For 2029/2029 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 878 event pairs, 35 based on Foata normal form. 8/223 useless extension candidates. Maximal degree in co-relation 782. Up to 132 conditions per place. [2024-06-03 18:50:01,484 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 23 selfloop transitions, 12 changer transitions 9/48 dead transitions. [2024-06-03 18:50:01,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 48 transitions, 353 flow [2024-06-03 18:50:01,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:50:01,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:50:01,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-03 18:50:01,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 18:50:01,485 INFO L175 Difference]: Start difference. First operand has 64 places, 38 transitions, 237 flow. Second operand 8 states and 120 transitions. [2024-06-03 18:50:01,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 48 transitions, 353 flow [2024-06-03 18:50:01,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 48 transitions, 321 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 18:50:01,489 INFO L231 Difference]: Finished difference. Result has 63 places, 35 transitions, 214 flow [2024-06-03 18:50:01,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=214, PETRI_PLACES=63, PETRI_TRANSITIONS=35} [2024-06-03 18:50:01,489 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 34 predicate places. [2024-06-03 18:50:01,489 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 35 transitions, 214 flow [2024-06-03 18:50:01,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:01,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:01,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:01,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 18:50:01,490 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:50:01,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:01,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1666890315, now seen corresponding path program 5 times [2024-06-03 18:50:01,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:01,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387430745] [2024-06-03 18:50:01,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:01,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:01,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:01,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:01,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:01,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387430745] [2024-06-03 18:50:01,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387430745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:01,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:01,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:50:01,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313789748] [2024-06-03 18:50:01,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:01,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:50:01,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:01,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:50:01,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:50:01,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:50:01,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 35 transitions, 214 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:01,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:01,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:50:01,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:01,745 INFO L124 PetriNetUnfolderBase]: 84/198 cut-off events. [2024-06-03 18:50:01,745 INFO L125 PetriNetUnfolderBase]: For 1583/1583 co-relation queries the response was YES. [2024-06-03 18:50:01,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 741 conditions, 198 events. 84/198 cut-off events. For 1583/1583 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 760 event pairs, 29 based on Foata normal form. 6/204 useless extension candidates. Maximal degree in co-relation 708. Up to 122 conditions per place. [2024-06-03 18:50:01,746 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 21 selfloop transitions, 10 changer transitions 10/45 dead transitions. [2024-06-03 18:50:01,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 45 transitions, 320 flow [2024-06-03 18:50:01,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:50:01,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:50:01,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-03 18:50:01,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49166666666666664 [2024-06-03 18:50:01,748 INFO L175 Difference]: Start difference. First operand has 63 places, 35 transitions, 214 flow. Second operand 8 states and 118 transitions. [2024-06-03 18:50:01,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 45 transitions, 320 flow [2024-06-03 18:50:01,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 45 transitions, 292 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 18:50:01,751 INFO L231 Difference]: Finished difference. Result has 61 places, 32 transitions, 189 flow [2024-06-03 18:50:01,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=189, PETRI_PLACES=61, PETRI_TRANSITIONS=32} [2024-06-03 18:50:01,752 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 32 predicate places. [2024-06-03 18:50:01,752 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 32 transitions, 189 flow [2024-06-03 18:50:01,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:01,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:01,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:01,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 18:50:01,753 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:50:01,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:01,753 INFO L85 PathProgramCache]: Analyzing trace with hash -304801827, now seen corresponding path program 6 times [2024-06-03 18:50:01,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:01,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326953241] [2024-06-03 18:50:01,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:01,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:01,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:01,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:01,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326953241] [2024-06-03 18:50:01,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326953241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:01,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:01,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:50:01,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091139084] [2024-06-03 18:50:01,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:01,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:50:01,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:01,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:50:01,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:50:01,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:50:01,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 32 transitions, 189 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:01,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:01,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:50:01,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:02,039 INFO L124 PetriNetUnfolderBase]: 74/178 cut-off events. [2024-06-03 18:50:02,039 INFO L125 PetriNetUnfolderBase]: For 1350/1350 co-relation queries the response was YES. [2024-06-03 18:50:02,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 640 conditions, 178 events. 74/178 cut-off events. For 1350/1350 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 659 event pairs, 25 based on Foata normal form. 8/186 useless extension candidates. Maximal degree in co-relation 608. Up to 99 conditions per place. [2024-06-03 18:50:02,040 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 22 selfloop transitions, 8 changer transitions 6/40 dead transitions. [2024-06-03 18:50:02,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 40 transitions, 285 flow [2024-06-03 18:50:02,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:50:02,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:50:02,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-06-03 18:50:02,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-06-03 18:50:02,042 INFO L175 Difference]: Start difference. First operand has 61 places, 32 transitions, 189 flow. Second operand 6 states and 93 transitions. [2024-06-03 18:50:02,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 40 transitions, 285 flow [2024-06-03 18:50:02,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 40 transitions, 259 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-03 18:50:02,045 INFO L231 Difference]: Finished difference. Result has 55 places, 29 transitions, 162 flow [2024-06-03 18:50:02,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=162, PETRI_PLACES=55, PETRI_TRANSITIONS=29} [2024-06-03 18:50:02,045 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 26 predicate places. [2024-06-03 18:50:02,046 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 29 transitions, 162 flow [2024-06-03 18:50:02,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:02,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:02,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:02,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 18:50:02,046 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:50:02,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:02,047 INFO L85 PathProgramCache]: Analyzing trace with hash -304592577, now seen corresponding path program 7 times [2024-06-03 18:50:02,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:02,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647547012] [2024-06-03 18:50:02,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:02,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:02,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:02,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:02,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:02,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647547012] [2024-06-03 18:50:02,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647547012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:02,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:02,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:50:02,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620386299] [2024-06-03 18:50:02,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:02,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:50:02,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:02,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:50:02,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:50:02,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:50:02,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 29 transitions, 162 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:02,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:02,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:50:02,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:02,319 INFO L124 PetriNetUnfolderBase]: 65/165 cut-off events. [2024-06-03 18:50:02,319 INFO L125 PetriNetUnfolderBase]: For 833/833 co-relation queries the response was YES. [2024-06-03 18:50:02,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 560 conditions, 165 events. 65/165 cut-off events. For 833/833 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 599 event pairs, 21 based on Foata normal form. 6/171 useless extension candidates. Maximal degree in co-relation 530. Up to 89 conditions per place. [2024-06-03 18:50:02,320 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 21 selfloop transitions, 5 changer transitions 8/38 dead transitions. [2024-06-03 18:50:02,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 38 transitions, 252 flow [2024-06-03 18:50:02,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:50:02,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:50:02,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 94 transitions. [2024-06-03 18:50:02,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5222222222222223 [2024-06-03 18:50:02,322 INFO L175 Difference]: Start difference. First operand has 55 places, 29 transitions, 162 flow. Second operand 6 states and 94 transitions. [2024-06-03 18:50:02,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 38 transitions, 252 flow [2024-06-03 18:50:02,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 38 transitions, 225 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-03 18:50:02,324 INFO L231 Difference]: Finished difference. Result has 52 places, 26 transitions, 130 flow [2024-06-03 18:50:02,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=130, PETRI_PLACES=52, PETRI_TRANSITIONS=26} [2024-06-03 18:50:02,325 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 23 predicate places. [2024-06-03 18:50:02,325 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 26 transitions, 130 flow [2024-06-03 18:50:02,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:02,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:02,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:02,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 18:50:02,326 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:50:02,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:02,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1672615767, now seen corresponding path program 6 times [2024-06-03 18:50:02,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:02,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980021448] [2024-06-03 18:50:02,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:02,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:02,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:02,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:02,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:02,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980021448] [2024-06-03 18:50:02,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980021448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:02,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:02,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:50:02,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210162024] [2024-06-03 18:50:02,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:02,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:50:02,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:02,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:50:02,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:50:02,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:50:02,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 26 transitions, 130 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:02,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:02,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:50:02,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:02,599 INFO L124 PetriNetUnfolderBase]: 43/115 cut-off events. [2024-06-03 18:50:02,599 INFO L125 PetriNetUnfolderBase]: For 558/558 co-relation queries the response was YES. [2024-06-03 18:50:02,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 115 events. 43/115 cut-off events. For 558/558 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 329 event pairs, 17 based on Foata normal form. 6/121 useless extension candidates. Maximal degree in co-relation 336. Up to 52 conditions per place. [2024-06-03 18:50:02,601 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 16 selfloop transitions, 2 changer transitions 12/34 dead transitions. [2024-06-03 18:50:02,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 34 transitions, 206 flow [2024-06-03 18:50:02,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:50:02,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:50:02,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 101 transitions. [2024-06-03 18:50:02,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48095238095238096 [2024-06-03 18:50:02,602 INFO L175 Difference]: Start difference. First operand has 52 places, 26 transitions, 130 flow. Second operand 7 states and 101 transitions. [2024-06-03 18:50:02,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 34 transitions, 206 flow [2024-06-03 18:50:02,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 34 transitions, 187 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-03 18:50:02,603 INFO L231 Difference]: Finished difference. Result has 49 places, 21 transitions, 86 flow [2024-06-03 18:50:02,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=86, PETRI_PLACES=49, PETRI_TRANSITIONS=21} [2024-06-03 18:50:02,604 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 20 predicate places. [2024-06-03 18:50:02,604 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 21 transitions, 86 flow [2024-06-03 18:50:02,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:02,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:02,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:02,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 18:50:02,605 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-03 18:50:02,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:02,605 INFO L85 PathProgramCache]: Analyzing trace with hash -38895297, now seen corresponding path program 8 times [2024-06-03 18:50:02,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:02,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509483682] [2024-06-03 18:50:02,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:02,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:02,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:02,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:02,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:02,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509483682] [2024-06-03 18:50:02,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509483682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:02,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:02,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:50:02,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357626403] [2024-06-03 18:50:02,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:02,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:50:02,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:02,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:50:02,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:50:02,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-03 18:50:02,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 21 transitions, 86 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:02,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:02,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-03 18:50:02,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:02,837 INFO L124 PetriNetUnfolderBase]: 20/60 cut-off events. [2024-06-03 18:50:02,837 INFO L125 PetriNetUnfolderBase]: For 217/217 co-relation queries the response was YES. [2024-06-03 18:50:02,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 60 events. 20/60 cut-off events. For 217/217 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 92 event pairs, 2 based on Foata normal form. 6/66 useless extension candidates. Maximal degree in co-relation 145. Up to 24 conditions per place. [2024-06-03 18:50:02,838 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 0 selfloop transitions, 0 changer transitions 25/25 dead transitions. [2024-06-03 18:50:02,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 25 transitions, 120 flow [2024-06-03 18:50:02,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:50:02,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:50:02,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 82 transitions. [2024-06-03 18:50:02,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-06-03 18:50:02,840 INFO L175 Difference]: Start difference. First operand has 49 places, 21 transitions, 86 flow. Second operand 6 states and 82 transitions. [2024-06-03 18:50:02,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 25 transitions, 120 flow [2024-06-03 18:50:02,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 25 transitions, 98 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-03 18:50:02,840 INFO L231 Difference]: Finished difference. Result has 35 places, 0 transitions, 0 flow [2024-06-03 18:50:02,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=35, PETRI_TRANSITIONS=0} [2024-06-03 18:50:02,841 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 6 predicate places. [2024-06-03 18:50:02,841 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 0 transitions, 0 flow [2024-06-03 18:50:02,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:02,844 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-03 18:50:02,844 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-03 18:50:02,845 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-03 18:50:02,845 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-03 18:50:02,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 18:50:02,845 INFO L445 BasicCegarLoop]: Path program histogram: [8, 6, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2024-06-03 18:50:02,848 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-03 18:50:02,848 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-03 18:50:02,852 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-03 18:50:02,852 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-03 18:50:02,853 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.06 06:50:02 BasicIcfg [2024-06-03 18:50:02,853 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-03 18:50:02,853 INFO L158 Benchmark]: Toolchain (without parser) took 12694.33ms. Allocated memory was 157.3MB in the beginning and 272.6MB in the end (delta: 115.3MB). Free memory was 114.2MB in the beginning and 125.5MB in the end (delta: -11.3MB). Peak memory consumption was 103.3MB. Max. memory is 16.1GB. [2024-06-03 18:50:02,853 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 113.2MB. Free memory is still 85.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-03 18:50:02,854 INFO L158 Benchmark]: Witness Parser took 0.17ms. Allocated memory is still 157.3MB. Free memory is still 117.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-03 18:50:02,854 INFO L158 Benchmark]: CACSL2BoogieTranslator took 596.51ms. Allocated memory is still 157.3MB. Free memory was 113.5MB in the beginning and 87.6MB in the end (delta: 25.9MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2024-06-03 18:50:02,854 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.01ms. Allocated memory is still 157.3MB. Free memory was 87.6MB in the beginning and 85.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-03 18:50:02,854 INFO L158 Benchmark]: Boogie Preprocessor took 39.40ms. Allocated memory is still 157.3MB. Free memory was 85.5MB in the beginning and 83.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-03 18:50:02,855 INFO L158 Benchmark]: RCFGBuilder took 490.74ms. Allocated memory is still 157.3MB. Free memory was 83.4MB in the beginning and 109.4MB in the end (delta: -26.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-06-03 18:50:02,856 INFO L158 Benchmark]: TraceAbstraction took 11516.57ms. Allocated memory was 157.3MB in the beginning and 272.6MB in the end (delta: 115.3MB). Free memory was 108.4MB in the beginning and 125.5MB in the end (delta: -17.1MB). Peak memory consumption was 99.3MB. Max. memory is 16.1GB. [2024-06-03 18:50:02,857 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 113.2MB. Free memory is still 85.7MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.17ms. Allocated memory is still 157.3MB. Free memory is still 117.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 596.51ms. Allocated memory is still 157.3MB. Free memory was 113.5MB in the beginning and 87.6MB in the end (delta: 25.9MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.01ms. Allocated memory is still 157.3MB. Free memory was 87.6MB in the beginning and 85.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.40ms. Allocated memory is still 157.3MB. Free memory was 85.5MB in the beginning and 83.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 490.74ms. Allocated memory is still 157.3MB. Free memory was 83.4MB in the beginning and 109.4MB in the end (delta: -26.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 11516.57ms. Allocated memory was 157.3MB in the beginning and 272.6MB in the end (delta: 115.3MB). Free memory was 108.4MB in the beginning and 125.5MB in the end (delta: -17.1MB). Peak memory consumption was 99.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 763]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 764]: 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 5 procedures, 47 locations, 4 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: 11.4s, OverallIterations: 39, TraceHistogramMax: 1, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1893 SdHoareTripleChecker+Valid, 3.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1440 mSDsluCounter, 369 SdHoareTripleChecker+Invalid, 2.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 218 mSDsCounter, 201 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6126 IncrementalHoareTripleChecker+Invalid, 6327 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 201 mSolverCounterUnsat, 151 mSDtfsCounter, 6126 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 229 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=532occurred in iteration=25, InterpolantAutomatonStates: 253, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.2s InterpolantComputationTime, 588 NumberOfCodeBlocks, 588 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 549 ConstructedInterpolants, 0 QuantifiedInterpolants, 5325 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 39 InterpolantComputations, 39 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-03 18:50:02,887 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